Direct Vision Standard (DVS) London: The top cause for revocations

The Road Haulage Association (RHA) has warned that the top cause for revocations since the Direct Vision Standard (DVS) came into effect in March is lack of signage on third-party and rented trailers.

The Direct Vision Standard measures how much an HGV driver can see directly through their cab windows. This indicates the level of risk to vulnerable road users, such as people walking and cycling near the vehicle.

Under DVS, HGVs over 12 tonnes rated zero stars must carry a prominent rear sign, warning vulnerable road users of blind spots. Those found to be in breach of the scheme face a Penalty Charge Notice (PCN) of up to £550 (reduced by 50 per cent if paid within 14 days).


A warning sign must be displayed on all trailers, even if TfL has granted a permit to a zero-starred vehicle based on photo evidence showing a tractor and trailer in situ with a warning sign.

The absence of a warning sign on the trailer, even if the unit has a permit, will result in the permit for that vehicle being revoked.

RHA advises that drivers using third-party trailers should include looking for these signs as part of their walk-around check before leaving. If absent, a sticker or reusable magnetic sign must be affixed onto the trailer.

If stopped and the trailer signage is missing, operators must reapply for the permit for the vehicle as the revocation process can’t be reversed once set in motion.


The safety permit scheme covers most of Greater London and is in operation 24 hours a day, every day of the year. Applying for a permit is free of charge. More information about the scheme and map where it operates can be found here.