A renewed warning is being made for drivers to observe the red lights at a level crossing on the Romney, Hythe and Dymchurch miniature railway in Kent.
Driver Kevin Crouch died when a car collided with his train in 2003
Police said they had received reports of three vehicles driving through the lights and across the railway tracks in the space of just one day.
The incidents happened at the unmanned crossing in Dungeness Road, Lydd.
Train drivers Kevin Crouch and Suzanne Martin were killed in collisions with cars on the line in 2003 and 2005.
Police said a dark green Land Rover Discovery and a white Renault Traffic van "drove through the red lights at speed" in Dungeness Road on Sunday lunchtime.
A silver Volkswagen also went through the same crossing just after 1730 BST on Sunday, officers said.