Traffic signsUnited Kingdom

Learn traffic rules with clear explanations and visual examples in our illustrated book, designed to make studying simple and engaging.

Traffic signs

Traffic rules

Warning signs

A warning sign is a traffic sign that alerts drivers to a potential danger or change in road conditions ahead, giving them enough time to slow down and react safely. These signs warn about hazards such as sharp bends, pedestrian crossings, slippery surfaces, merging traffic, animals on the road, or upcoming intersections. Their purpose is not to forbid or command anything, but simply to prepare drivers for situations that require extra attention.

Warning for merging traffic from the left.

Warning for a double curve, first left then right.

Warning for a double curve, first right then left.

Warning for a road narrowing on the left.

Warning for a road narrowing on the right.

Warning for a road with two-way traffic.

Warning for a danger with no specific traffic sign.

Warning for loose chippings on the road surface.

Warning for a railway crossing without barriers.

Warning for a railway crossing with barriers.

Warning for a railway crossing with one track.

51. Warning for tractors

This traffic sign indicates a warning for tractors or other agricultural vehicles. Slow-moving agricultural vehicles may enter, cross or travel along the road ahead. Reduce speed and overtake only where it is permitted and clearly safe.

52. Warning for trams

This traffic sign indicates a warning for trams. Tram tracks cross or run along the road ahead, and trams may enter the traffic path. Reduce speed, watch carefully for approaching trams and follow the applicable traffic signals, priority signs and local rules.

53. Warning for a railway crossing without barriers

This traffic sign indicates a warning for a railway crossing without barriers. It alerts drivers to an upcoming level crossing where railway tracks cross the road and no barriers or gates are present to stop traffic. Drivers should slow down and look both ways for trains.

54. Warning for a railway crossing with barriers

This traffic sign indicates a warning for a railway crossing with barriers. It alerts drivers to an upcoming level crossing with gates or barriers that close when a train approaches. Drivers should be ready to stop when the barriers are down or flashing lights activate. Never attempt to cross when gates are closing or closed.

55. Warning for a railway crossing with one track

This traffic sign indicates a warning for a railway crossing with one track. It alerts drivers to a level crossing where a single railway track crosses the road. Drivers should approach with caution and be prepared to stop, even if no barriers or warning lights are active.