Drivers are to receive warning letters after they were caught speeding in Rothbury.
More than 200 vehicles were checked as part of a Community Speedwatch initiative, a partnership between police and the Safer Northumberland Partnership which enables local people to help reduce traffic speeds.
Volunteers were located in three areas where locals have raised concerns about speeding. Thirty motorists were caught driving faster than the speed limit.
Neighbourhood Inspector Paul Truscott, said: “Community Speedwatch volunteers give up their own time to provide a valuable contribution to the work of police and other agencies to tackle neighbourhood issues. People driving above the speed limit should be aware we will continue to carry out initiatives such as this and take action against those who are persistently caught speeding.”