Structural Gauge Envelopes - Public Transport Victoria

VRIOGS 001 Revision B 25
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)
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