Get an exclusive 15% off - Offer ends next week!

    With-flow bus lane — UK road sign

    A blue sign showing a bus and cycle, marking a lane reserved for buses running in the same direction as other traffic.

    With-flow bus lane — blue and white rectangle UK road sign

    A with-flow bus lane runs alongside general traffic in the same direction. The sign is a blue rectangle showing a bus, often with a cycle and taxi symbol, plus the hours of operation.

    The lane is separated by a solid white line and the words BUS LANE painted on the surface.

    What this sign means

    During the hours shown the lane is reserved for buses and any other users listed on the sign, typically cycles and licensed taxis.

    If no times are shown, the lane operates twenty four hours a day.

    What to do when you see it

    Read the hours before deciding whether you may use the lane.

    • Stay out of the lane during its hours of operation.
    • You may cross it to turn left into a side road or a driveway.
    • Do not park or load in the lane while it is operating.
    • Check mirrors for cyclists before crossing the lane.

    How this sign is tested

    Questions test who may use a bus lane and what happens when no times are displayed, which means the lane is always in force.

    Others test that you may cross the lane to reach a side road.

    Common mistakes

    Using an empty bus lane to pass a queue during operational hours, which is enforced by camera in most cities.

    Assuming a lane with no times shown is only busy at peak periods.

    With-flow bus lane — blue and white rectangle UK road sign

    Test yourself on this one

    Road and traffic signs is the biggest category in the question bank with 102 questions, and signs turn up inside other categories too. Work through them free, no sign-up needed.

    Practise road sign questions

    Frequently asked questions

    Can I drive in a bus lane outside its hours?

    Yes, provided the times on the sign have ended and no other restriction applies.

    What if no times are shown?

    The lane operates at all times.

    Can I cross a bus lane to turn left?

    Yes, you may cross it to enter or leave a side road or premises.

    Passed your theory? Get the practical booked

    Your theory certificate lasts two years. Most learners who use it quickly do it with an intensive course — a block of hours with a DVSA approved instructor and a practical test at the end, instead of one lesson a week for months.