Why is the speed limit through roadworks on Motorways 40 mph when it used to be 50mph?
For safety reasons, when traffic management is installed on a motorway, we advise that the speed limit is reduced to 50 mph. However, there are occasions where conditions for road workers and/or drivers are particularly hazardous and the speed limit has to be reduced to 40mph. These are where operatives are working close to running lanes or in a restricted space within the traffic management or where narrow lanes are in operation.
