Overview
- Dorset Council published proposals in June 2026 to set a default 20mph legal speed limit across almost all roads in Dorchester, replacing most 30mph limits.
- Under the plan only Middle Farm Way in Poundbury would remain at 30mph, and a small number of streets near schools already operate at 20mph.
- The council says no scheme will proceed without clear local backing, requiring town or parish council and local ward member agreement plus evidence such as a community survey.
- Dorset Police has confirmed it will not provide extra enforcement resources and will police the new 20mph limits using the same approach it uses for existing 30mph limits, acting where persistent speeding is evident.
- The council argues lower limits could encourage walking and cycling and reduce fuel use by smoothing driving, but it also notes current research has shown no clear improvement in local air quality so far.