20mph zones

MQT on 2012-03-14
Session date: 
March 14, 2012
Question By: 
Jenny Jones
City Hall Greens
Asked Of: 
The Mayor


A constituent has asked, is it possible to have a 20mph zone with a 30mph road running through it?


Answer for 20mph zones

Answer for 20mph zones

Answered By: 
The Mayor

There are already a number of locations in London where a 30mph road (for example the TLRN or borough principal roads) will go through areas where there are adjacent 20mph zones on both sides.

National mandatory speed limit signing regulations require that clear and unambiguous speed limit signs are provided to ensure that there is no doubt as to the speed limit in operation on a particular road. In order to comply with the signing regulations, both of the 20mph zones adjacent to the 30mph road would require 20mph signs and corresponding 30mph 'terminal' signs at every junction where they meet the 30mph road. The Department for Transport advises local highway authorities that entry treatments (in the form of speed reducing features) should also be provided at these junctions to highlight the change to the lower speed limit.