Road signs, markings, and vehicle markings•Rule 225
Flashing Amber Beacons on Slow Vehicles
This rule is a legal requirement
Vehicles with flashing amber beacons. These warn of a slow-moving or stationary vehicle (such as a traffic officer vehicle, salt spreader, snow plough or recovery vehicle) or abnormal loads, so approach with caution. On unrestricted dual carriageways, motor vehicles first used on or after 1 January 1947 with a maximum speed of 25 mph (40 km/h) or less (such as tractors) MUST use a flashing amber beacon (also see Rule 220).
💡Example
If you see a vehicle with a flashing amber beacon, it usually means it is moving slowly, is stationary, or is carrying an abnormal load, so you should approach with extra care. On unrestricted dual carriageways, very slow vehicles like tractors that cannot go faster than 25 mph must use a flashing amber beacon. For example, if you are driving on a dual carriageway at night and see a tractor ahead with a flashing amber light, you should slow down, keep your distance, and be prepared to pass it safely when it is clear to do so.
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