Level crossings are an open interface between the road and the railway, so there is increased potential for pedestrian and road user behaviour to affect train operations and put themselves in danger• Level Crossing controlled by Flashing Lights • Level Crossing controlled by Flashing Lights and Half Boom Gates • Level Crossing controlled by Flashing Lights and Four Quadrant Half Boom Gates In this Standard the term HalfBoom Gate shallLevel Crossing Lights Every model railway has a place where road and rail meet, and when it does, some form of warning is needed Flashing lights work well, but something is needed to drive them And that is where this circuit comes in

Investigation Launched Into Staggeringly Dangerous Traffic Light At Level Crossing Cambridgeshire Live