Ten drivers were issued with £60 fines in a crackdown on boy racers in a Cumbrian town over the weekend.
Police set up speed checks in 30mph zones across Penrith in an operation to combat irresponsible driving.
A spokeswoman said the move was a response to complaints of young drivers speeding in the town, especially near the South End Road carpark.
The highest speed recorded was 47mph and eight of the drivers fined were aged between 17 and 25.
The motorists will also receive three penalty points on their licence.