"Network Rail said there were 400 incidents at level crossings and nearly 30 near misses, where trains narrowly avoided hitting motorists, in 2008.
The company is calling for changes so that tougher sentences can be handed out to offenders.
It released disturbing CCTV footage of a near-miss incident at Llangadog, Carmarthenshire in July 2007.
The video had already been viewed by a judge at Swansea before he sentenced the driver, who lived locally, and had his wife and young son in the car at the time.
The motorist admitted dangerous driving, claiming he did not see the flashing lights and failed to notice cars waiting at the crossing."