A level crossing where barrier-dodging drivers have been dicing with death has failed railway industry safety tests.
The Government's chief rail safety watchdog said the Beddingham crossing, near Lewes, had failed a risk assessment.
The HM Railway Inspectorate considers it one of the most dangerous level crossings in the South-East.
It plans to meet with track operator Network Rail to press for speedy improvements.
A Network Rail spokeswoman said the safety tests indicated there was a problem but denied the crossing had failed.
She said misuse by motorists meant there was the potential for accidents.
The intersection, on the A27 between Lewes and Polegate, is a notorious bottleneck and an increasing number of drivers have been weaving between the existing half-barriers as trains approach in order to avoid delays.
Network Rail wants to fit full-width barriers to combat red-light jumpers but the plan has been criticised because it could make jams worse.
Network Rail believes a bridge would be the long-term solution.
Highways chiefs have proposed a flyover as part of £16 million project on that part of the A27.
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