
Advance Warning
Traffice merges from
left

Light Signal
Stop.
At level crossings,
lifting bridges,
airfields,
fire stations etc

Negative Instruction
No goods vehicles
over maximum gross
weight shown

Positive Instruction
Turn left ahead

Advance Warning
Maximum headroom
available at arch bridge

Positive Instruction
Mini roundabout

Advance Warning
Steep hill upwards

Positive Instruction
Traffic may pass either
side to reach
same destination

Information
Pedestrian crosing point
over tramway

Advance Warning
Quayside or riverbank

Information
Temporary hazard
at road works

Negative Instruction
No left turn