Roaming sheep and deer can be a hazard for drivers
A road safety crackdown on traffic speeding through the Ashdown Forest is getting under way.
Police, fire and council officers in East Sussex are teaming up with volunteers to enforce the 40mph limit.
The move is to encourage drivers to give space to cyclists, horse riders, walkers, sheep, cattle and deer.
Volunteers will use mobile devices on Wednesday, which show drivers a smiley face if they are within the limit, and a frown if they should slow down.
East Sussex county councillor Matthew Lock said the forest had roaming livestock including sheep and deer, and it was for safety reasons that the council wanted drivers to cut their speed.
Last year, signs alerting drivers to the dangers of deer in the Ashdown Forest were put up on the A22.
Collisions involving deer in the Ashdown Forest have trebled in the past five years to more than 300 each year, the council said.