The Official Highway Code

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Motorways

Many other Rules apply to motorway driving, either wholly or in part: Rules 46, 57, 83-126, 130-134, 139, 144, 146-151, 160, 161, 219, 221-222, 225, 226-237, 274-278, 280, and 281-290.

General

Motorway signals

257

Amber flashing lights. These warn of a hazard ahead. The signal may show a temporary maximum speed limit, lanes that are closed or a message such as 'Fog'. Adjust your speed and look out for the danger until you pass a signal which is not flashing or one that gives the 'All clear' sign and you are sure it is safe to increase your speed.