Tidal flow lane control

Signals and markings that change which lanes carry traffic at different times of day. These are the tidal flow lane control you need to recognise for the DVSA theory test and for safe driving afterwards.

Every tidal flow sign in this category

Tidal flow lane open, green arrow

An overhead green arrow signal showing that a tidal flow lane is open for use in your direction of travel.

Tidal flow lane closed, red cross

An overhead red cross signal showing that a lane is closed to traffic and must not be used.

White diagonal arrow, move left

An overhead white diagonal arrow signal warning drivers that a tidal flow lane is closing and they must move left.

Tidal flow lane ahead

A triangular warning sign advising drivers that a tidal flow lane system operates on the road ahead.