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T.P.D.M.V.2.4
4*3.13 Stagger Distances
4.3.13.1 It is important at staggered junctions that a minimum spacing be
achieved between the two side roads in order to provide for
satisfactory manoeuvring of large vehicles. The following
stagger distances will cater for the longest articulated vehicle
using the Territory's roads ;
Minimum stagger distances (m)
between centre lines of minor roads
Type of Junction Bight/Left Stagger Left/Right Stagger
Simple 50 50
Shadow Island 40 50*
Physical Island 50 60*
Dual Carriageway 60 60*
The left/right stagger values marked with an asterisk, although
representing the minimum distances for long vehicle manoeuvring,
should in fact be increased for higher design speeds. This is
because at left/right staggered junctions the right turning
lanes lie side by side and their combined length is greater than
the minimum length required for vehicle manoeuvring* Left right
stagger distances at all but simple Junctions are therefore
governed by design speeds as follows :
Design Speed (km/h) 70 85 100
Stagger Distance (m) 60 75 100
These figures will also vary with major road gradient as
described in paragraph 4.3.9.2.