Structural Gauge Envelopes - Public Transport Victoria

Victorian Rail Industry Operators Group Standards 

VRIOGS 001 

Structure Gauge Envelopes - Minimum 

Clearances for Infrastructure Adjacent to 

the Railway 

Revision: Revision B 

Issue Date: 04/06/12 

NOTE: This document is controlled only when viewed on the VRIOG Engineering Standards website. Any other 

copy of this document is uncontrolled, and the content may be inaccurate.

VRIOGS 001 Revision B ii 

VRIOGS 001 Structure Gauge Envelopes - Minimum Clearances for Infrastructure Adjacent to the 

Railway 

Revision B 

Issue Date: 04/06/2012 

APPROVAL STATUS 

APPROVER STATUS DATE QUALIFICATIONS 

Document Developer 

VRIOG Steering 

Committee 

Accredited Rail Operators 

Metropolitan Train 

Intrastate Train 

Interstate Train 

Tram 

VicTrack 

DOCUMENT CONTROL 

REVISION ISSUE DATE APPROVED BY SUMMARY OF CHANGE 

Rev A 26/03/07 VRIOGS Steering 

Committee 

New document 

Rev B 25/05/12 VRIOGS Steering 

Committee 

Document updated (see change register) 



VRIOGS 001 Revision B iii 

PURPOSE OF THE STANDARD 

The Standard has been created through the collaboration of members of the Victorian Rail Industry 

Operators’ Group (VRIOG) for the purpose of establishing standards which, if implemented throughout 

the Victorian Rail Network, will facilitate the interoperability of Infrastructure. The Victorian rail network 

covers all tracks within Victoria including metropolitan, country, interstate, intrastate and freight 

networks. 

The use of the Standard is not prescribed by law but, if adopted, it is expected that users of this 

Standard will conform with the provisions of the Standard so that the purpose of the Standard can be 

achieved. 

DISCLAIMER 

The Standard is published by the Public Transport Victoria for information purposes only and does not 

amount to any kind of advice. 

Each person is responsible for making his or her own assessment of all such information and for 

verifying such information. The content of this publication is not a substitute for professional advice. 

Public Transport Victoria and VRIOG accept no liability for any loss or damage to any person, 

howsoever caused, for information contained in this publication, or any purported reliance thereon. 

HISTORY 

This Standard supersedes VRIOGS 001-2005, issued on the 26/03/2007. 

COPYRIGHT STATEMENT 

© Public Transport Victoria 2012. 

This publication is copyright. No part may be reproduced by any process except in 

accordance with the provisions of the Copyright Act. 

Where information or material is so used, it should be used accurately and the Standard 

should be acknowledged as the source of the information. 



VRIOGS 001 Revision B iv 

TABLE OF CONTENTS 

SECTION 1.0 CONVENTIONS .......................................................................................... 1 

SECTION 2.0 DEFINITIONS ............................................................................................. 2 

SECTION 3.0 SCOPE AND GENERAL ............................................................................. 7 

3.1 Scope ............................................................................................................ 7 

3.2 Applications ................................................................................................... 7 

3.3 Background .................................................................................................... 7 

SECTION 4.0 NOTES APPLICABLE TO ALL FIGURES ................................................... 8 

4.1 General Notes ................................................................................................ 8 

4.2 Curved Track ............................................................................................... 10 

SECTION 5.0 DEVIATIONS AND CRITICAL CLEARANCES TO INFRASTRUCTURE... 11 

5.1 Deviations from the Minimum Clearances to Infrastructure .......................... 11 

5.2 Critical Clearances to Infrastructure ............................................................. 11 

SECTION 6.0 STRUCTURE GAUGE ENVELOPES FOR EXTERNAL DEVELOPERS – 

FOR NEW INFRASTRUCTURE ADJACENT TO, OR IN THE AIR SPACE OVER TRACK.. 12 

SECTION 7.0 STRUCTURE GAUGE ENVELOPES FOR THE PTV OR ACCREDITED 

RAIL OPERATOR – FOR NEW, OR ALTERED INFRASTRUCTURE ADJACENT TO, OR IN 

THE AIR SPACE OVER TRACK .......................................................................................... 15 

SECTION 8.0 STRUCTURE GAUGE ENVELOPES FOR THE PTV OR ACCREDITED 

RAIL OPERATORS – FOR INFRASTRUCTURE INTENDED TO BE ADJACENT TO, OR IN 

THE AIR SPACE ABOVE THE TRACK. .............................................................................. 18 

SECTION 9.0 STRUCTURE GAUGE ENVELOPES – FOR EXISTING 

INFRASTRUCTURE ADJACENT TO, OR IN THE AIR SPACE OVER TRACK, EXCLUDING 

TRACKS OPERATED BY ARTC. ........................................................................................ 21 

SECTION 10.0 STRUCTURE GAUGE ENVELOPES – FOR NEW OR EXISTING 

INFRASTRUCTURE ADJACENT TO, OR IN THE AIR SPACE OVER TRAM TRACKS AND 

TRAMSTOP PLATFORMS .................................................................................................. 23 

SECTION 11.0 ROLLING STOCK CENTRE AND END THROW AND CANT EFFECT .... 24 

11.1 Rolling Stock Centre and End Throw ........................................................... 24 

11.2 Cant Effect ................................................................................................... 25 

SECTION 12.0 BIBLIOGRAPHY ....................................................................................... 26 

SECTION 13.0 APPENDIX A ............................................................................................ 27 



VRIOGS 001 Revision B v 

LIST OF FIGURES 

Figure 1 – Structure Gauge Envelopes for External Developers – for new 

Infrastructure adjacent to, or in the Air Space over track ........................................ 14 

Figure 2 – Structure Gauge Envelopes for the PTV and Accredited Rail Operators – 

for new or altered Infrastructure adjacent to, or in the Air Space over track. ...... 17 

Figure 3 – Structure Gauge Envelopes for PTV and Accredited Rail Operators – for 

Infrastructure adjacent to tracks. ................................................................................ 20 

Figure 4 – Structure Gauge Envelopes for Existing Infrastructure adjacent to or in the 

Air Space over track...................................................................................................... 22 

Figure 5 Static Rolling Stock Outline dimension for RISSB Reference Vehicle 1. ..... 27 



VRIOGS 001 Revision B 1 

SECTION 1.0 Conventions 

1. Words or phrases that appear capitalised out of context are defined within the Definitions 

section of this VRIOG Standard. 

2. The word “Shall” is to be understood as mandatory. 

3. The word “Should” is to be understood as non-mandatory i.e. advisory or recommended. 

4. Uncontrolled Standards may not be referenced within the VRIOG Standards. These include 

former Public Transport Corporation Standards, Franchisee Standards, Franchisee 

Subcontractor Standards and Infrastructure Lessee Standards. 

5. Controlled Standards, including Australian Standards and other VRIOG Standards, may be 

referenced but only if: 

• The referenced item cannot be adequately explained with an amount of text that could 

not reasonably be inserted into the body of the Standard 

• The reader is not referenced to another Controlled Standard necessary for the item to 

be adequately explained i.e. one document link only 

• The referenced document is a figure or table and could not reasonably be included in 

the appendices of the Standard. 

6. The format employed in the VRIOG Standards is compatible with Australian Standards, and 

will be used from this point on. 

7. The VRIOG Standards contain engineering information necessary to operate a safe railway. 

VRIOG Standards will not contain any information that can be construed as a work instruction, 

procedure, process or protocol. This information forms the basis of each individual entity’s 

Safety Accreditation Certification, and, as such, is outside the scope of VRIOG Standards. 




SECTION 2.0 Definitions 

Terminology used and/or applied in this Standard is defined as follows: 

Accredited Rail 

Operator (ARO) 

An Accredited Rail Operator is a rail Infrastructure manager or 

a rolling stock operator who is accredited under part 5 of the 

Rail Safety Act 2006. 

Alignment Referred to as the horizontal or vertical alignment. Horizontal 

alignment is the design horizontal alignment of the track (i.e. 

straights, curves etc.). Vertical alignment is the design vertical 

alignment of the track (gradients and vertical curves). 

Alterations 

(pertaining to 

existing 

Infrastructure) 

Is a change to Infrastructure, be it track-side or track 

Infrastructure, which is significant enough to change the 

physical attributes or the position of that Infrastructure. 

Air Space The region that exists vertically above the railway and 

bounded by the horizontal extremities of the railway. 

Broad Gauge Track where the inside running edge of the two rail heads are 

separated by 1600mm. Typically, this configuration exists for 

the Victoria’s Suburban and Country passenger networks and 

the majority of the freight networks 

Cant The vertical distance that the outer rail is raised above the 

inner or grade rail at a curve. Also known as superelevation. 

Centre Line A vertical plane of equal distance to the running edge on the 

two adjacent rail heads on a section of track. On dual gauge 

track there are two track centre lines one for each gauge of 

track. The centre lines on dual gauge track are determined 

from the running edge of the common rail and the running 

edge of the applicable gauge’s running rail. 

Centre Throw The curve throw of the vehicle body towards the inside of a 

horizontal curve at the vehicle centre. The body centre is the 

position of maximum inwards curve throw for a symmetrical 

vehicle. 1 

Controlled 

Standards 

A standard that is currently protected by a system that 

ensures that the integrity of its contents cannot be 

compromised by revision or amendments by personnel not 

authorised by the Victorian Rail Industry Operators Group. 

Critical Clearance Any clearance which is less than, or at, those specified in the 

structure gauge envelope for existing structures. 

1 RISSB Glossary of Railway Terminology Guideline 




Curve Throw The extent to which a transverse cross-section of a vehicle is 

displaced inwards or outwards from the track centreline on a 

horizontal curve, or upwards and downwards on a vertical 

curve. 2 

Deviation to 

Standard 

Double Stacked 

Dual Gauge 

Track 

Where there is a deviation to the minimum Horizontal or 

Vertical clearance outlined in this Standard. 

Freight train wagons loaded with containers stacked in a 2 

high configuration are defined as double stacked. This is only 

permitted on corridors where there is unrestricted vertical 

clearance of 7.1m from the rail level. Refer to ARTC Track 

and Civil Code of Practice, SA/WAS & VIC, Section 7 

Clearances, Figure 7.6 Rolling Stock outline F. 

Track that is constructed with a mixture of both Standard 

gauge (1435mm) and Broad gauge (1600mm) widths utilising 

a common rail. 

End Throw The curve throw towards the outside of a horizontal curve at 

the vehicle end which is the position of maximum outwards 

curve throw for a uniform vehicle. 2 

Engineering 

Change Control 

Procedure 

Existing 

Infrastructure 

External 

Developers 

A document that sets out the procedure for initiating, 

developing, approving, implementing and auditing changes to 

the configuration, maintenance and technical standards of 

Rolling Stock and Infrastructure 

Infrastructure presently on the Victorian rail network that may 

have been designed to the standards prevailing at the time. 

Any entity which does not have a franchisee or lease 

agreement with the PTV and is not incorporated within PTV 

that endeavours to construct Infrastructure adjacent to and/or 

in the air space above the railway corridor. 

Grain Spout A conduit for the loading of grain into rail freight vehicles. 

These are only encountered in sidings on the country rail 

network specifically designed for the purpose. 





Horizontal 

Clearance 

Identified 

Structure 

The horizontal distance measured square to the track, 

separating trackside Infrastructure and the Centre Line of 

track and/or separating track centrelines 

Note that on canted/superelevated track the horizontal 

clearance is measured based on a vertical line through the 

track centre as shown below. 

Where Ea = Applied Cant (Superelevation) 

Additional horizontal clearances to allow for any Cant effect 

and Centre and End throw is added as outlined in Section 4.2 

and Section 11. 

Any Infrastructure that has a Critical Clearance, for example 

situated within the Structure Gauge Envelope for existing 

Infrastructure. 

Infrastructure Any building or permanent installation located within or 

borders the railway corridor. 

Kinematic 

Envelope 

A two dimensional cross-section of the shape of a rail vehicle 

that consists of the static outline plus the maximum permitted 

allowance for vertical and lateral movements. It also includes 

any cant and curve affect associated with curved track and 

dynamic movements in response to track irregularity. 

Maintainer Either an ARO or an organisation contracted to an ARO, that 

performs maintenance and renewal works. 

Management of 

Change 

A document that sets out the procedure for initiating, 

developing, approving, implementing and auditing changes to 

the configuration, maintenance and technical standards of 

Rolling Stock and Infrastructure 

PTV Public Transport Victoria 

Rail Level A horizontal plane formed by the rail heads, at right angles to 

the centre line, of a section of tangent track. Where the track 

has a cant the plane is assumed to be horizontal to the higher 

of the two rail heads. 

Rolling Stock Any train, track machine, piece of equipment, or lading, which 

is expected to be on a track, guided by the rails, outside of a 

worksite. 




Rolling Stock 

Outline 

The combination of rolling stock cross-section, bogie centres 

(or wheelbase for non-bogie rolling stock) and body 

overhang, and rolling stock tolerances which define the swept 

path of the rolling stock. This does not include expendable 

items located on the Rolling Stock. 

Safe Area A safe area is an area where Infrastructure and authorised 

staff are able to stand during the passage of a train. 

Safety 

Accreditation 

Certification 

The certification required by an entity or party to an 

Infrastructure Management Agreement with the Chief 

Executive Officer of Public Transport Victoria that ensures 

that, amongst other things, it has a robust Safety 

Management System. 

Standard Gauge Track where the inside running edge of the two rail heads are 

separated by 1435mm. Typically, this configuration exists for 

Interstate lines and branch lines off interstate lines and the 

Melbourne tram network. 

Structure Gauge 

Envelope 

Superelevation See Cant 

A cross sectional profile that designates the minimum 

allowable dimensions that must separate trackside 

Infrastructure from the Centre Lines and Rail Level of the 

track. 

Swept Path The swept path is the generic name for the 3-dimensional 

shape of the vehicle on any radius curve made up from the 

kinematic outline plus the inner and outer curve throws 

produced by the vehicle on that curve. 3 

Track Geometry The horizontal and vertical alignment, twist and cant of the 

track. 

Track Centres 

Uncontrolled 

Standards 

Vertical 

Clearance 


The horizontal distance between the centrelines of tracks 

A Standard that is not currently protected by a system that 

ensures that the integrity of its contents cannot be 

compromised by revision or amendments by personnel not 

authorised by the Victorian Rail Industry Operators Group. 

The minimum vertical distance from the top of the running 

rails to the underside of a structure. 




VRIOG The Victorian Rail Industry Operators’ Group comprising the 

following members: 

a) Public Transport Victoria 

b) VicTrack 

c) Metro Trains Melbourne 

d) Yarra Trams 

e) V/Line 

f) Australian Rail Track Corporation 




SECTION 3.0 Scope and General 

3.1 Scope 

The purpose of the structure gauge envelope is to create an adequate area that separates rolling 

stock from rolling stock and rolling stock from track side Infrastructure. This Standard mandates the 

minimum and absolute allowable dimensions (the Structure Gauge Envelope) that shall separate any 

new or altered trackside Infrastructure from the track centre line and the rail level. It also mandates the 

minimum and absolute allowable horizontal dimension that shall separate the centre line of any track. 

For existing Infrastructure this standard specifies the minimum structure gauge and the controls to be 

established for any deviations to these standards. 

The Victorian rail industry consists of a number of accredited rail operators which makes use of 

several disparate configurations of track and rolling stock. As such, the situation may arise where the 

structure gauge envelope will alter subject to the configurations of rolling stock and track 

Infrastructure. 

3.2 Applications 

This standard is applicable to all Infrastructure (excluding stabling sidings – refer to VRIOG 004.13) 

that is situated adjacent to, or in the Air Space over a railway. Standards applicable to light rail are 

outlined in Section 10 only. 

The Structure Gauge Diagrams are categorised according to ownership of the incumbent 

Infrastructure, such as: 

Figure 1 Structure Gauge Envelopes for External Developers, is to be used for new 

Infrastructure adjacent to, or in the Air Space over track. 

Figure 2 Structure Gauge Envelopes for the PTV and Accredited Rail Operators, is to be used 

for new, or altered, Infrastructure adjacent to, or in the Air Space over track. 

Figure 3 Structure Gauge Envelopes for the PTV and Accredited Rail Operators, for 

Infrastructure intended to be adjacent to, or in the Air Space above the track. This 

includes platform, signalling equipment, level crossing Infrastructure, services 

Infrastructure and track work. 

Figure 4 Structure Gauge Envelopes is to be used for existing Infrastructure adjacent to, or in 

the Air Space over track. 

3.3 Background 

Early efforts to establish a Structure Gauge Envelope primarily involved separating the kinematic 

envelopes of rolling stock from trackside Infrastructure, by a minimum nominal distance of 200mm. 

Typically the minimum horizontal clearance of 2400 mm (at signal posts only - Section 7, Envelope I) 

allows sufficient room, deemed to be 600mm to allow rail workers, under emergency situations, to 

safely take refuge while trains pass. A number of different increments of this horizontal clearance 

exist up to a maximum of 6000 mm, which allows for vehicles to travel parallel to the track. 

Some of these assets may have been designed with less rigorous clearances than currently specified 

and, unless being altered, need only comply with Structure Gauge Envelopes for Existing 

Infrastructure represented in Figure 4. 




SECTION 4.0 Notes Applicable to all Figures 

4.1 General Notes 

a) All horizontal distances are measured square to the track in metres. Each figure contains 

a suite of Structure Gauge Envelopes which are the minimum cross sectional profiles 

within which Infrastructure shall not encroach. These Structure Gauge Envelopes are 

orientated according to two normalised axes being: 

i. The centre line of the track extended Vertical Square to the plane of the 

rails. (Horizontal clearance axis) 

ii. Note to allow for any Cant effect and Centre and End throw an additional 

horizontal clearance is added as outlined in Section 4.2 and Section 11The 

rail level (Vertical clearance axis) 

b) All horizontal distances are measured from the track centre line. The vertical datum line in 

each of the drawings represents the track centre line of the two outer most tracks, where 

multiple tracks exist. 

c) All Structure Gauge Envelope measurements are applicable to broad, standard and dual 

gauge track. On dual gauge track, the standard gauge centreline shall be used on the 

common rail side and the broad gauge centreline shall be used on the dual gauge rail 

side. 

d) All Infrastructure design shall incorporate provisions for long term corridor strategies. 

Long term clearance forecast planning is the responsibility of Public Transport Victoria 

(PTV). Consultation shall be made with the Strategic Planning and Development Division 

and the Technical Services Division within PTV in the design phase of any project to 

determine what long term clearance allowances shall be made within the project design. 

e) Infrastructure adjacent and/or in the air space over track that has been identified to be 

used for freight purposes, as a default should be built to the Vertical, Horizontal and the 

Horizontal track centre to centre Clearances to allow for interstate freight and/or double 

stacked container operations as stipulated in this Standard. The only exception to this is 

where approval has been given by the Strategic Planning and Development Division and 

the Technical Services Division within PTV, to build to a reduced vertical clearance that 

does not provide for double stacked containers. The Structure Gauge for the ‘Passenger 

and Freight services (excluding interstate and double stacked container operations)’ 

should be used in these circumstances; 




f) The Track Centres of tracks running in parallel straight lines shall be separated by the 

following minimum Horizontal Clearances: 

i. If one or both tracks are utilised for interstate freight or for the transport of 

double-stacked containers: 4.5m 

ii. If both tracks are utilised only for passenger services or for freight services 

that are exempt from interstate/double-stacked freight requirements: 4.0m 

iii. For dual gauge track the horizontal clearance between track centres shall 

be measured from the track centre closest to the adjacent track. 

iv. Where standard signal structures are located between tracks the vertical 

clearances outlined in Figure 2, Envelope I shall be adhered to. 

Note these clearances are calculated from the outermost of any signal 

structure. 

v. Where overhead structures, lighting structures and/or signal gantries are 

located between tracks the vertical clearances outlined in Figure 2, 

Envelope H shall be adhered to. 

Note these clearances are calculated from the outermost of any structure or 

gantry. 

vi. The track Centreline spacing of tracks on curved tracks to allow for Cant 

and Centre and End throw, are nominated in Section 4.2 of this document 

vii. Where bridge piers are situated between tracks, the tracks centre line 

spacing shall be a minimum of 3.0m to the nearest face of the pier. 

For existing Infrastructure the horizontal clearances outlined in item f) may be 

unachievable. In these cases reference should be made to Section 5.1 Substandard 

Clearances. 

g) For any new Infrastructure be it a retaining wall, bridge pier or any other structure 

(excluding bridges where AS5100 or the relevant ARO standards shall apply), where the 

structure is longer than 20 metres and is within 3.7m of the track centre-line a ‘safe area’ 

shall be provided as part of the Infrastructure at 20 metre intervals to allow authorised 

staff to stand during the passage of a train. Where there are multiple tracks (2 or more) 

safe areas shall be provided on both sides of the tracks. Provision for a safe area is not 

required in the design of platforms. 

This ‘safe area’ dimensions shall be 

i. Height: 2000mm 

ii. Width: 1500mm 

iii. Depth: 700mm 

h) The minimum Vertical Clearance for a Grain Spout shall be 3.6m. The spout is to be 

aligned horizontally with the centre line of the track. 

i) Where track maintenance or renewal activities are carried out in locations subject to 

Substandard Clearances (Section 5.0), the maintainer shall conduct a post construction 

validation check on the clearances to ensure that they comply with this standard. 




j) Alterations to existing Infrastructure or to the existing track alignment shall not result in a 

reduction of the horizontal or vertical clearances in situations where the clearances do not 

met the minimum clearances set out in this document. Alterations shall be offset with an 

alteration in the new or existing Infrastructure or track alignment to ensure that the pre 

alteration clearances are maintained. 

k) Any Structure placed above or adjacent to overhead traction wires shall comply with the 

Electrical Safety (Installations) Regulations 2009. 

4.2 Curved Track 

Curved tracks centre-lines require an extra horizontal clearance to the inside and outside of the curved 

track to allow for the effects caused by the cant elevation and the centre and end throw of rolling 

stock. 

Where track (current or future) are utilised for interstate freight and/or for double stacked containers 

freight, the structure gauge envelopes outlined in Figures 1 to 4 and the horizontal clearances outlined 

in Section 4.1 item f) shall be altered based on the following conditions of curve radius: 

a) ≤1300 metres or ≥300 metres: Add 700mm to the horizontal clearances on the inside of 

the curve and add 100mm to horizontal clearances on the outside of the curve. Note 

these figures are based on a 150mm and 0mm Cant to provide for clearances on the 

inside and outside rail on curved track respectively. 

b) ≤300 metres or ≥100 metres: Add 1100mm to the horizontal clearances on the inside of 

the curve and add 400mm to horizontal clearances on the outside of the curve. Note 

these figures are based on a 150mm and 0mm Cant to provide for clearances on the 

inside and outside rail on curved track respectively. 

Where track is utilised for passenger services and has no future requirement to be utilised for 

interstate freight and/or for double stacked containers, the structure gauge envelope outlined in 

Figures 1 to 4 and the horizontal clearances outlined in Section 4 item f) shall be altered based on 

the following conditions of curve radius: 

c) 1200m: Add 60mm to the horizontal clearance on the inside of the curve and add 30mm 

to the horizontal clearances on the outside of the curve 

d) 1100m: Add 90mm to the horizontal clearance on the inside of the curve and add 35mm 

to the horizontal clearance on the outside of the curve 

e) 1000m: Add 110mm to the horizontal clearance on the inside of the curve and add 40mm 


f) 900m: Add 130mm to the horizontal clearance on the inside of the curve and add 45mm 


g) 800m: Add 170mm to the horizontal clearance on the inside of the curve and add 50mm 


h) 700m: Add 200mm to the horizontal clearance on the inside of the curve and add 55mm 


i) 600m: Add 240mm to the horizontal clearance on the inside of the curve and add 65mm 


j) 500m: Add 290mm to the horizontal clearance on the inside of the curve and add 80mm 


k) 400m: Add 330mm to the horizontal clearance on the inside of the curve and add 100mm 





l) 300m: Add 390mm to the horizontal clearance on the inside of the curve and add 135mm 


m) 200m: Add 480mm to the horizontal clearance on the inside of the curve and add 200mm 


Note these figures are based on a 100mm and 0mm Cant to provide for clearances on the inside and 

outside rail on curved track respectively. Where a curve radius value falls between the curve radius 

as given in points c) to m), the tighter curve radius shall be used. 

Alterations to the structure gauge envelope on curved track that provide allowance for Cant elevation 

and rolling stock Centre and End throw may also be derived by the use of the principles outlined in the 

Section 11. 

If these principles are used it shall be demonstrated to the Public Transport Victoria, Technical 

Services Division and to the ARO on how the allowances for curved tracks have been derived. 

SECTION 5.0 Deviations and Critical Clearances to Infrastructure 

5.1 Deviations from the Minimum Clearances to Infrastructure 

Clearances less than the minimum stipulated in this Standard are only permissible on works where 

there are alterations to existing track geometry, the installation of additional tracks within an existing 

rail environment or where significant physical constraints exist that prohibit complying with the 

dimensions outlined in this Standard. No deviations to the minimum clearances outlined in this 

document shall be employed in a particular situation if more clearance can be provided. In 

cases where existing Infrastructure does not conform to these conditions, refer to section 5.2 for the 

absolute limits. 

Any deviations to this Standard shall be received prior to the construction/modification of the 

Infrastructure. Where deviations are proposed, an ARO shall apply its Engineering Change/Waiver 

process to determine if the deviations are acceptable. In the event that an Engineering Change/Waiver 

process is approved the absolute minimum conditions as outlined in Section 9 shall be met. 

5.2 Critical Clearances to Infrastructure 

Critical clearances are defined as those where Infrastructure is situated closer than, or at the 

minimum clearance specified in Section 9.0 and cannot be improved without substantial changes to 

the Infrastructure. It is only applicable to a specific location and requires the application and approval 

of the AROs Engineering Change/Waiver process to demonstrate that the risk of collision is 

manageable. It may incorporate site specific track and rolling stock tolerances and may require 

conditions to be placed on the location or rolling stock such as a reduction in train speeds or an 

increase in inspection or maintenance. Infrastructure that has been identified with a critical clearance 

shall be defined as an Identified Structure which is held and updated by the ARO responsible for that 

particular railway. 

Due to the reduced clearances and the increased risk associated with these it is essential that: 

a) The ARO is to conduct a post construction clearance survey to verify that the dimensions 

are not less than those specified in the Engineering Change/Waiver process. 

b) The actual track design position shall be tied into a monitoring mark/s to enable manual 

checking by a track inspector at regular intervals and allow checking after any maintenance 

work has been carried out. 




SECTION 6.0 Structure Gauge Envelopes for External Developers – for New 

Infrastructure adjacent to, or in the Air Space over Track. 

This section applies to any new Infrastructure constructed or installed by external developers adjacent 

to or in the air space above the railway. These requirements are applicable only to tangent track and 

are to apply to the Centre Line of the two outermost tracks 

For curved track adjustments refer to Section 4.2. Notes applicable to Figure 1 

ENVELOPE A 

Envelope A applies to the placement of new Infrastructure adjacent to and/or in the air space 

above the track where track access for road vehicles is required. 

H1 

V1 

V2 

The minimum Horizontal Clearance shall be 6.0m for all Air Space developments 

adjacent to the track where track access for road vehicles is required. 

The minimum Vertical Clearance shall be 7.1m for Air Space above the track where 

the track has been identified to be used for interstate freight and/or double stacked 

containers operations. 

Note for a grain gantry over a siding the Vertical Clearance can be reduced to 5.26m 

subject to approval of PTV. 

For track that is or is to be utilised for passenger and/or freight services and has no 

future interstate freight and/or double stacked containers operation requirements, the 

Vertical Clearance may be reduced to a minimum of 5.75m, subject to approval being 

granted to alter the height of existing overhead traction power wiring if required. 

ENVELOPE B 

Envelope B applies to the placement of new Infrastructure adjacent to and/or in the airspace 

above the track where track access for road vehicles is not required. 

H2 

V1 

V2 

The minimum Horizontal Clearance shall be 4.0m for all Air Space developments 

where track access is not required for road vehicles parallel to track, subject to the 

approval of PTV. 

The minimum Vertical Clearance shall be 7.1m for the Air Space above the track 

where the track has been identified to be used for interstate freight and/or double 

stacked containers operation requirements. 







ENVELOPE C 

Envelope C applies to the placement of new Infrastructure adjacent to and/or in the air space 

above the track where track access for road vehicles is not required and the track uses 

concrete sleepers or slab track. 

H3 

The minimum Horizontal Clearance for all Air Space developments shall be 3.0m 

where track access is not required for road vehicles parallel to track and where the 

track uses concrete sleepers or slab track, subject to the approval of PTV. 




V1 

V2 

The minimum Vertical Clearance shall be 7.1m for the Air Space above the track 

where the track has been identified to be used for interstate freight and/or double 

stacked containers operation requirements. 







ENVELOPE D1 

Envelope D1 applies to the placement of temporary structures by developers of new 

Infrastructure adjacent to and/or in the air space above track that is being utilised by 

passenger and freight services excluding freight services that are to transport double stacked 

containers. For freight that is to transport doubled stacked containers refer to envelope D2. 

For electrified passenger services the vertical height shall be increased to 6.48m as 

represented by the dotted line on D1. 

The minimum vertical and horizontal dimensions are displayed in Envelope D1 and are 

subject to the approval of PTV. 

ENVELOPE D2 

Envelope D2 applies to the placement of temporary structures by developers of new 

Infrastructure adjacent to and/or in the air space above track that is being utilised for freight 

services that are to transport double stacked containers. The minimum vertical and horizontal 

dimensions are displayed in Envelope D2 and are subject to the approval of PTV. 

Checks shall also be made also with the rail operator and Infrastructure owner to ensure that 

the transit space for any oversize vehicles approved to operate on the line is not infringed 

upon 

ENVELOPE E 

Envelope E applies to the placement of any structural foundations beneath the track. 

V3 

H3 

The minimum vertical distance beneath the rail head to be free from any structural 

foundations (except platforms) shall be 1.0m. 

The minimum horizontal distance, measured from the centre line of the track, to be free 

from any structural foundations (except platforms) shall be 3.0m. 




Figure 1 – Structure Gauge Envelopes for External Developers – for new Infrastructure adjacent to, or in the Air Space over track 

V1 = 7.100m 

Interstate Freight and/or Double 

Stacked Containers Operations 

6.50m 

A B C 

6.80m 

D2 

1.08m 

H3 = 3.00 m 

H2 = 4.00 m 

H1 = 6.00 m 

1.525m 

2.5m 

1.70m 

0.79m 

Design Rail Level 

For Tangent 

Track Only 

Passenger and Freight Services 

(excluding Interstate Freight and Double 

Stacked Container Operations) 

NOTE: This document is controlled only when viewed on the VRIOG Engineering Standards website. Any other copy of this document is uncontrolled, and the content 

may be inaccurate. 

1.525m 

2.135m 

6.48m 1.345m 

1.55m 

1.70m 

H3 

D1 

E E 

V3 = 1.00m 

0.20m 

H2 

1.08m 

3.66m 

H1 

4.88m 

C B A 

V2 = 5.750m


SECTION 7.0 Structure Gauge Envelopes for the PTV or Accredited Rail 

Operator – for new, or altered Infrastructure adjacent to, or in 

the Air Space over Track 

This section applies to any new, or alterations to existing Infrastructure constructed or installed by or 

on behalf of the PTV or accredited Infrastructure managers. These requirements are applicable only to 

tangent track. For curved track adjustments, refer to Section 4.2. Notes applicable to Figure 2: 

ENVELOPE F 

Envelope F applies to the placement of bridges, retaining walls (excluding platforms), bridge 

piers and structures adjacent to and/or in the airspace above the track. 

V4 

V5 

H4 

H5 

H6 

ENVELOPE G 

The minimum Vertical Clearance shall be 7.1m for new bridges and/or structures 

above track that has been identified to be used for interstate freight and/or for double 

stacked containers operations. 




interstate freight or double stacked containers operation requirements, the Vertical 

Clearance may be reduced to a minimum of 5.75m subject to approval being 


The minimum Horizontal Clearance shall be 6.0m for bridge piers, bridge abutments 

and retaining walls (excluding platforms), where track access is required for road 

vehicles parallel to track. 


and retaining walls (excluding platforms), where track access is not required for road 

vehicles parallel to track, subject to the approval of PTV. 


and retaining walls (excluding platforms), where track access is not required for road 

vehicles parallel to track and where the track uses concrete sleepers or slab track, 

subject to the approval of PTV. 

Envelope G applies to the placement of verandah eaves adjacent to the track. 

V7 

V8 

H9 

H10 

There shall be a minimum Vertical Clearance of 7.1m for verandah eaves above 

track that has been identified to be used for interstate freight and/or for double 


For track that is utilised for passenger and/or freight services and has no future 

interstate freight and/or double stacked containers operation requirements, the 

Vertical Clearance may be reduced to a minimum of 5.26m for verandah eaves. 

There shall be a minimum Horizontal Clearance of 3m for verandah eaves where the 

track has been identified to be used for freight operations. Note in certain 

circumstances a reduced clearance of no less than 2.5m may be accepted subject 

to approval of PTV and the ARO. 

For track that is utilised for passenger services only and has no future freight 

requirements the minimum Horizontal Clearance may be reduced to 2.4m for 

verandah eaves. 




ENVELOPE H 

Envelope H applies to the placement of overhead electrification structures, lighting structures 

and signal gantries adjacent to and/or in the air space above track. 

V7 

V8 

H8 

ENVELOPE I 

The minimum Vertical Clearance shall be 7.1m for lighting structures and signal 

gantries above track that has been identified to be used for interstate freight and/or 

for double stacked containers operations. 

For track that is utilised for passenger and/or freight services and has no future 

interstate freight and/or double stacked containers operation requirements, the 

Vertical Clearance may be reduced to a minimum of 5.26m for overhead 

electrification structures, lighting structures and signal gantries. 

The minimum Horizontal Clearance shall be 3.0m for overhead electrification and 

lighting structures, and signal gantries. 

Envelope I applies to the placement of standard signal structures adjacent to and/or in the air 

space above track. Standard signal structures include items such as signal masts, relay boxes, 

signal equipment on stands or similar. The requirements for signal gantries are outlined in 

Envelope H. 

V7 

V8 

There shall be a minimum Vertical Clearance of 7.1m for standard signal structures 

above track that has been identified to be used for interstate freight and/or for double 


For track that is utilised for passenger services and has no future interstate freight 

and/or double stacked containers operation requirements, the Vertical Clearance may 

be reduced to a minimum of 5.26m for standard signal structures. 

H9, There shall be a minimum Horizontal Clearance of 3m for signal structures where the 

track has been identified to be used for freight operations. Note in certain circumstances 

a reduced clearance of no less than 2.5m may be accepted subject to approval of PTV 

and the ARO 

H10 

ENVELOPE J 

For track that is utilised for passenger services only and has no future freight 

requirements the minimum Horizontal Clearance shall be 3m for signal structures. Note 

in certain circumstances a reduced clearance of no less than 2.4m may be accepted 

subject to approval of PTV and the ARO. 

Envelope J applies to the placement of any structural foundations (except platforms) beneath the 

track. 

V6 

H7 

The minimum vertical distance shall be 1.0m beneath the rail head which is to be free 

from any structural foundations (except platforms). 

The minimum horizontal distance shall be 3.0m, measured from the centre line of the 

track, which is to be free from any structural foundations (except platforms). 




Figure 2 – Structure Gauge Envelopes for the PTV and Accredited Rail Operators – for new or altered Infrastructure adjacent to, or in the Air 

Space over track. 

V4, V7 = 7.10m 

6.50m 

3.80m 

F 

Interstate Freight and/or Double 

Stacked Containers Operations 

F 

F 

V6 = 1.00m 

G 

I 

1.50 m 

H6,H7,H8=3.00 m 

H5= 4.00 m 

H4 = 6.00 m 

H9 = 2.50 m 

H10 = 2.40 m 


H6, H7, H8 

H5 



1.55 m 

3.00 m 

J J 

Passenger and Freight Services 

(excluding Interstate Freight and Double 

Stacked Container operations) 

G 

I 

H 

F 

H4 

3.66m 

F F 

For Tangent 

Track Only 

3.80m 

V8 = 5.26m 

V5 = 5.75m


SECTION 8.0 Structure Gauge Envelopes for the PTV or Accredited Rail 

Operators – for Infrastructure intended to be adjacent to, or in 

the Air Space above the track. 

These requirements are applicable only to tangent track. For curved track adjustments, refer to 

Section 4.2. Notes applicable to Figure 3: 

ENVELOPE K and K* 

Envelope K and K* applies to the placement of platforms adjacent to the track. 

(K) 

H11,H12 

(K*) 

H13 

ENVELOPE L 

The Horizontal Clearance to the platform face shall be 

a) 1.7m with a construction tolerance of +10mm, - 0mm (H11) 

The Horizontal Clearance to the platform coping shall be 

b) 1.55m with a construction tolerance of +10mm, - 0mm (H12), (for 

example 150mm overhang). 

Platforms adjacent to standard gauge track identified to be used for interstate freight 

and/or double stacked containers operation, shall have a Horizontal Clearance of 1.7m 

with a construction tolerance of +10mm, - 0mm to the platform coping. 

For additional information on platform dimensions and minimum clearances at 

platforms refer to VRIOGS 002.1. 

Envelope L applies to the placement of signal trunking and train stops (in there lowered position) 

adjacent to the track. It applies to track that is utilised for the electrified network only. 

V12 

H14 

V13 

V14 

H15 

ENVELOPE M 

Signal trunking and train stops shall have a maximum Vertical Clearance of 102mm 

Signal trunking and train stops shall have a minimum Horizontal Clearance of 1067mm 

The sloping vertical extent of the placement of signalling trucking adjacent to the 

platform edge shall be a maximum of 230mm 

The sloping vertical extent of the placement of signalling trunking adjacent to 

structures other than the platform edge shall be a maximum of 158mm 

The sloping Horizontal Clearance of the placement of signal trunking shall be a 

minimum of 1220mm 

Envelope M applies to the placement of services adjacent to the track in the area beneath the 

platform overhang and is for the use of PTV or ARO’s only. It exists in the area beneath the 

platform coping overhang. 

H12 

The minimum Horizontal Clearance for the placement of services shall be 1.55m. 

NOTE: This Document is controlled only when viewed on the VRIOG Engineering Standards Website. Any other copy of 

this document is uncontrolled, and the content may not be current.


ENVELOPE N 

Envelope N applies on track that is used for passenger and freight operations and is for the 

placement of signalling equipment (excluding signalling masts and gantries) and approved 

structures only, and is typically situated between parallel running tracks. The signalling 

equipment outlined above includes such items as signal trunking, small track units and dwarf 

signals. On track that is only used for freight operations see Envelope N*. 

V15 

H12 

ENVELOPE N* 

The maximum Vertical Clearance shall be 1.5m 

The minimum Horizontal Clearance shall be 1.55m 

Envelope N* applies only where track has been identified to be used for interstate freight 

operations to prevent fouling of rolling stock. Envelope N* is for the placement of signalling 

equipment (excluding signalling masts and gantries) and approved structures only, and is 

typically situated between parallel running tracks. The signalling equipment outlined above 

includes such items as signal trunking, small track units and dwarf signals. 

V16 

H16 

ENVELOPE O 

The maximum Vertical Clearance of this cut out shall be 1.043m 

The minimum Horizontal Clearance of this cut out shall be 1.911m 

Envelope O applies to Broad or Standard gauge track and is for the placement of guard rails. The 

guard rail arrangements may exist for V and K crossings on the regional rail network. This 

Envelope is represented on the platform edge side but applies to both platform edge and nonplatform 

edge. The Vertical and Horizontal Clearances outlined below also applies to figures 1 and 

2. 

V17 

H17 

ENVELOPE P 

The maximum Vertical Clearance for the placement of guard rails is 25mm. 

The Horizontal Clearance for the placement of guard rails is 

1. On Broad gauge track between 580mm and 680mm from the track centre line 

2. On Standard gauge track between 660mm and 760mm from the track centre 

line. 

Envelope P applies to any track category be it Broad or Standard gauge and is for the placement 

of Tactile Ground Surface Indicators (TGSI’s) located on pedestrian level crossings. This 

Envelope is represented on the platform edge side but applies to both platform edge and nonplatform 

edge. The Vertical Clearance outlined below also applies to figures 1 and 2. 

V18 

The maximum Vertical Clearance for the placement of TGSI’s is 25mm. 

The Horizontal Clearance for the placement of TGSI’s excluding placement on the top of 

rail and across flange gap is to be as per VRIOGS 003.2. 




Figure 3 – Structure Gauge Envelopes for PTV and Accredited Rail Operators – for Infrastructure adjacent to tracks. 

For additional information on minimum 

clearances at platforms refer to 

VRIOGS 002.1 

1.080m with a construction 

tolerance of +/- 0,10mm 

0.150 m 

K* 

V13 = 0.230 m 

K 

0.150 m 

M 

L 

Platform Edge Non - Platform Edge 

V12 = 0.102m 

H13 = 1.70 m 

H12 = 1.550 m 

H11 = 1.70 m 

O 

V17 = 0.025m 

H14 = 1.067 m 

H15 = 1.220 m 

H17 

0.760 m 

0.660 m 

0.680 m 

0.580 m 


H14 = 1.067 m 

H16 = 1.911m 

H12 = 1.550 m 

H15 = 1.220 m 



P 

V18 = 0.025m 

L 

0.102 m 

N 

V14 = 0.151 m 

For Tangent 

Track Only 

N* 

V16 = 1.043 

V15 = 1.500m


SECTION 9.0 Structure Gauge Envelopes – for Existing Infrastructure 

adjacent to, or in the Air Space over Track, excluding tracks 

operated by ARTC. 

There are numerous cases of existing Infrastructure that have been built to lesser clearance 

requirements then those outlined within this standard. This is due to much of the Infrastructure being 

built to meet standards prevailing at that time. In the cases where existing Infrastructure does not 

conform to the dimensions outlined earlier within this document then as an absolute minimum they 

shall comply with the structure gauge envelopes detailed in Figure 4. 

In addition to the requirements outlined in Figure 4 the following minimum conditions shall also apply: 

The Centre lines of tracks running in parallel straight lines shall be separated by a minimum Horizontal 

Clearances of: 

a) 3.556m between track centrelines 

b) Where existing lighting structures and signals and electrification structures are located 

between tracks the minimum horizontal clearance to closest edge of the structure shall be 

2.007m 

c) For curved tracks, track centreline spacing’s as nominated in Section 4.2 of this document 

In cases where existing Infrastructure does not conform to the structure gauge envelope outlined in 

Figure 4, refer to Section 5.2 Critical Clearances. 

ENVELOPE Q - Notes applicable to Figure 4: 

The structure gauge envelope for existing Infrastructure over track that has been identified to be used 

for Electric Motor Units shall comply with envelope Q. Note that: 

a) The minimum horizontal clearances outlined in Envelope Q applies to existing bridge piers, 

retaining walls, lighting and electrification structures, Verandah Eaves and signal structures. 

b) The minimum vertical clearances outlined in Envelope Q applies to existing bridges, standard signal 

and electrification structures, and lighting structures. 

Note: The above absolute minimum clearances and those outlined in Figure 4 only apply to 

rolling stock that meet the rolling stock outline diagram – static condition outlined in Standard 

Drawing STD_ R0009. These absolute minimum clearances do not apply to rolling stock that 

does not meet this static rolling stock envelope. 

ENVELOPE R - Notes applicable to Figure 4: 

The Structure Gauge Envelope for existing Infrastructure over track that is not used by Electric 

Motor Units shall comply with Envelope R. Note that: 

a) The minimum horizontal clearances outlined in Envelope R applies to existing bridge piers, 

retaining walls, lighting structures, verandah eaves and signals and electrification structures; 

b) The minimum vertical clearances outlined in Envelope R applies to existing bridges, standard signal 

structures, Verandah Eaves and lighting structures. 

Note: The above absolute minimum clearances and those outlined in Figure 4 only apply to 

rolling stock that meet the static envelope outlined in Appendix A, Figure 5. These absolute 

minimum clearances do not apply to rolling stock that does not meet this static rolling stock 

envelope. 




Figure 4 – Structure Gauge Envelopes for Existing Infrastructure adjacent to or in the Air Space over track. 

4.420 m 

4.153 m 

3.708 m 

Non - Electrified Electrified 

3.100 m 

R 

1.070 m 

1.702m 

2.007 m 

1.168 m 

1.525 m 

0.762 m 

1.220 m 

1.067m 




1.429 m 

1.702 m 

1.561 m 

1.316 m 

1.067 m 

2.007 m 

Q 

0.230m 0.102m 0.097 m 0.227 m 

1.043 m 

3.505 m 

3.989 m 

For Tangent 

Track Only 

4.125 m 

4.873 m


SECTION 10.0 Structure Gauge Envelopes – for new or existing 

Infrastructure adjacent to, or in the Air Space over Tram 

tracks and Tramstop Platforms 

The Structure Gauge Envelope for new or existing Infrastructure adjacent to, or in the Air Space over 

tram tracks and tram stop platforms is outlined in standard drawings STD_T9000 Revision A and 

STD_T0306 Revision B. The referenced standard drawings can be accessed through the Public 

Transport Victoria Drawing Management System at: 

https://dms.ptv.vic.gov.au/ 

The clearances outlined in the referenced drawings are for straight track only and an additional lateral 

distance, varying up to 600mm, is required on curves. A table for the additional clearances required for 

curved track is located on standard drawing STD_T0306 Revision B. If this is not used then the 

additional distance needs to be calculated and approved by the ARO. 




SECTION 11.0 Rolling Stock Centre and End Throw and Cant Effect 

For curved track with a radius of less than 1300 metres, allowance shall be made for the effect of track 

Cant and of rolling stock Centre and End Throw to determine the structure gauge envelope outline on 

a curved track. 

On an inside of a curved track the Centre Throw (Ct) and the Cant Effect shall be added to the 

minimum horizontal clearances outlined in this document. On the outside of a curved track the End 

Throw (Et) shall be added to, and the Cant Effect subtracted from, the minimum horizontal clearances 

outlined in this document. Note that the horizontal clearances outlined in this document are the 

minimum that shall apply. Any figure that may be calculated below this shall not apply. 

11.1 Rolling Stock Centre and End Throw 

The equations outlined below can be used to determine the additional rolling stock centre and end 

throw on curved track that is to be applied to the minimum structure gauge envelope. 

Centre and end throw of vehicles may be calculated as follows: 

Equation 1 4 2 

Ct = Bc /8R 

Equation 2 Et = (L 2 2 

- Bc )/8R 

Where: 

Ct = Centre throw of nominated vehicle in mm 

Et = End throw of nominated vehicle in mm 

Bc = Bogie centres of nominated vehicle in mm 

R = Radius of curve in mm 

L = Length of nominated vehicle in mm 

For passenger and freight networks (excluding Defined Interstate Rail Networks) a ‘Bc’ value of 

16150mm shall be used. 5 

For the Defined Interstate Rail Network a ‘Bc’ value of 18300mm shall be used. 6 

For passenger lines and freight networks (excluding Defined Interstate Rail Networks) a ‘L’ value of 

22850mm shall be used. 5 

For the Defined Interstate Rail Network a ‘L’ value of 25900mm shall be used. 6 

4 RISSB AS7507.1 Railway Rolling Stock – Rolling Stock Outlines 

5 Standard Drawing, STD_R0009 ‘Maximum Rolling Stock outline Kinematic Diagram – Type 1 Single Deck Cars’ 

6 ARTC Track and Civil Code of Practice SA/WA & Vic, Section 7 Clearances, figure 7.6 Rolling Stock outline F. 




11.2 Cant Effect 

The cant of the track tilts the vehicle towards the low rail side and has greatest effect at the highest 

point of the vehicle at the low rail side. The horizontal clearance shall be increased on the inside of the 

curve as the vehicle leans to a structure or vehicle. 

11.2.1 Passenger and Freight services (excluding defined interstate rail traffic) of a track 

gauge of 1600mm 

The addition horizontal clearance that is to be applied to the minimum structure gauge for passenger 

and freight services on a track gauge of 1600mm due to the cant effect is outlined in table 1. Note that 

the additional horizontal clearance required shall be added to the inside of the curve. 

Additional 

Horizontal 

Clearance 

required 

CANT (mm) 

10 20 30 40 50 60 70 80 90 100 110 120 130 140 

22 44 66 88 111 132 154 176 198 220 242 264 286 308 

Table 1 Cant Effect on Minimum Structure Gauge 

The additional horizontal clearance is able to also be calculated using Equation 3. Equation 3 is to be 

used to determine the additional horizontal clearance that is to be applied to the inside of a curve on 

passenger and freight services on a track gauge of 1600mm due to the cant effect: 

Equation 3 Cant effect = (Ea x Z)/1600 

Where Z = the vertical height above design rail height (mm) 

Ea = Applied Cant (Superelevation) (mm) 

11.2.2 Passenger and Freight services of a track gauge of 1435mm. 

Equation 4 below can be used to determine the additional horizontal clearance that is to be applied to 

the inside of the a curve on passenger and freight services on a track gauge of 1435mm due to the 

cant effect: 

Equation 4 Cant effect = (Ea x Z)/1435 

Where Z = the vertical height above design rail height (mm) 

Ea = Applied Cant (Superelevation) (mm) 




SECTION 12.0 Bibliography 

The following documents have been used in preparation and usage of this Standard: 

1) ARTC Track and Civil Code of Practice – Infrastructure Guidelines – Section 7 

clearances. 

2) Rail Corp ESC 215 Transit Space, Version 4.5. 

3) V/Line Procedures, Transit Space Clearances 




SECTION 13.0 Appendix A 

Figure 5 Static Rolling Stock Outline dimension for RISSB Reference Vehicle 1. 

Notes: 

1. For unrestricted interchange of rolling stock on all Standard and Broad gauge lines this profile 

cannot be infringed in any way. 

2. The distance between bogie pivot points is not to be increased above, as shown in Figure 5, 

unless adequate allowance is made by a reduction in width to compensate for the increased 

centre and end throw on a curve of 100 metre radius. 

3. The bottom of side hung doors which swing outwards shall have a minimum height above rail 

of 1120mm under all conditions. 

4. The clearances above rail must be preserved under all conditions of operation, loading and 

maintenance of a vehicle on level track.

Structural Gauge Envelopes - Public Transport Victoria

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