Where:
At the beginning of, and at entrances to, any carriageway, lane, path, bridge, or tunnel where it is unsafe or unsuitable for pedal cyclists and pedestrians to travel.
This sign is commonly found on freeways, high-speed roads, or restricted-access routes designed exclusively for motor vehicles.

Purpose:
To prohibit cyclists and pedestrians from entering or using that section of the road.
These areas are typically designed for faster-moving traffic, and the presence of slow-moving or vulnerable road users such as cyclists or pedestrians could create a serious safety hazard for both themselves and motorists.

Action:
Pedestrians and cyclists must not proceed beyond this sign.
They must use alternative routes specifically designated for non-motorised traffic.
Motorists should remain alert, as some cyclists or pedestrians may still ignore the prohibition and enter the restricted area.
Exercise extra caution, especially near entry or exit ramps, tunnels, or bridges where visibility and reaction time may be limited.