UWE’s Bristol Twenty Miles Per Hour Limit Evaluation (BRITE) study found that, on average, speeds on more than 100 surveyed roads have reduced since the 20mph speed limits were implemented, with average speeds of between 19mph and 26mph on 20mph roads shown in the report.
On 30mph streets, average speeds on the roads surveyed were below 30mph in every area.
The lower speeds were also found during night and summer times, when there is typically less traffic to slow motorists.