20 mph limit

A speed limit, indicated by signs and repeaters.

There is no traffic calming requirement with 20 mph limits. See the example below, on Tottenham Court Road in Camden. 

20 mph limit Tottenham Court Road

For this reason, 20 mph limits are not to be confused with 20 mph zones, which have design features that ensure (or aim to ensure) that they are naturally self-enforcing.

Referenced by