What happens to a 'safe' family car on a level crossing when a train hits it at high speed? Viewers of Top Gear will find ou on Sunday 25 February, when it broadcasts a unique event set up by Network Rail to highlight the dangers of level crossing misuse.

For the first time in over a decade, a staged crash involving a train was carried out in Britain. The event has a serious purpose - to graphically show to motorists the consequences of running the risk at level crossings.

Overseen by Jeremy Clarkson, a people carrier is parked on a level crossing on an operational part of the railway in rural Lincolnshire. Safely supervised by Network Rail specialists, an unmanned, 107-tonne, Class 31 diesel locomotive is set off by remote control. It hurtles towards the car at speeds of approaching 70mph. The aftermath is shocking.

Iain Coucher, Network Rail's Deputy Chief Executive said: "Though light-hearted in tone, the message is serious: Don't run the risk at level crossings. Our people worked hard for months to safely plan this staged event and the results are breathtaking. Level crossings are safe if used correctly so don't misuse them."

The event is one of the high points of a multi-million pound awareness campaign by Network Rail under the 'Don't run the risk' banner. This has included nationwide and local advertising including spots on television and radio and more than one million households were targeted to receive information leaflets. This is the most extensive public safety campaign ever run by the rail industry.

The show will be broadcast on BBC TWO 20.00 Sunday 25 February 2007. It was initially due to be aired earlier this month, but was postponed by the BBC due to a crossing accident in Scotland.