Motorway rules•Rule 257
Amber Flashing Motorway Signals
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.
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Amber flashing lights on a motorway warn you of a hazard ahead, such as bad weather, an obstruction, or lane closures, and may show a temporary speed limit or message. For example, if you see amber lights with the word ‘Fog’ and a lower speed limit, you should slow down, stay alert and follow the instructions until you pass a sign that is no longer flashing or shows ‘All clear’, and you are sure it’s safe to speed up again.
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