Overtaking lane signs
Purpose: These signs show that an overtaking lane will begin after the distance shown on the sign
Safety ramp signs
Purpose: These signs show when there is a safety ramp on the side of the road and the distance to it. Safety ramps allow out-of-control vehicles on steep descents to stop safely. You must not park or stop on a safety ramp, except in an emergency.
If there is not enough room for a safety ramp, there may be an arrester bed instead. An arrester bed is a gravel filled ramp that reduces the speed of out of control vehicles.
On right signs
Purpose: These are supplementary signs used with safety ramp signs that are on the right-hand side of the road.
Unsuitable for large vehicles sign
Purpose: These signs show that the traffic area ahead is not suitable for large vehicles to drive through. You might see this sign with a local traffic only sign