A new speed-activated warning sign is in action around Princes Risborough by volunteers from the Neighbourhood Action Group.
It will be moved to different locations around the town for seven days at a time and flash the messages ‘slow down’ and ‘30’.
It is funded by the local area forum.
Chairman of the action group Mandy Dormer said: “We often receive complaints about speeding from our residents and unfortunately we do have some roads that particularly suffer from this problem.
“We regularly carry out community speedwatch sessions in the areas of concern and now finally we have a new tool to help us remind drivers to watch their speed in residential areas, the much awaited mobile vehicle activated sign.
“We have also enlisted the help of local schoolchildren in the fight against speeding motorists.
“Pupils are currently producing posters designed to make drivers slow down – the winning designs will be reproduced as road side signs and we can’t wait to see them in November when a primary and a secondary school winner will be chosen.”