Someone was killed in a car at a level crossing in our town on Saturday - it's the second death there in two years, and there was another a few years back, where it was thought the girl involved was blinded by the low sun shining in her eyes.
I don't know the circumstances of this accident, but I've seen plenty of people taking risks at the (different) crossing next to the station - it's common to see two or three cars jump the lights - but there's a roundabout a car's length from the exit gate and the first car usually has to stop & the next two get stuck on the crossing.
The gates are down for an average of 20 minutes in an hour, so people know they are likely to be stuck for ages if they stop, and they take a chance. If they go ahead with the new Heathrow rail link, the gates will be shut for half an hour, so probably ther'll be even more idiots willing to risk it...