TRAFFIC INSTRUCTION SIGNS
Traffic instruction signs give you direction and more information about the road you are travelling on. This extra information can include:
Clearance of structures over the road
Restrictions for vehicle load limits
Climbing and overtaking lanes and turnouts
Steep descents and climbs and safety ramps
Road flooding depth indicators
Advance instruction for motorways and highways
DETOUR AND ALTERNATIVE ROUTE SIGNS
Low or load limited bridge ahead with detour signs
Purpose: These signs indicate that there is a bridge, underpass or other structure on or over the road ahead with a height clearance or weight limit. High or heavy vehicles must use the detour shown by the arrow on the sign.
Detour signs for high, heavy, long and wide vehicles
Purpose: These signs indicate that high, heavy, long or wide vehicles must not continue on the route ahead and that a detour is available instead. These vehicles must use the detour shown by the arrow on the sign.