The crime-fighting idea is now being tested at various train stations by British Transport Police (BTP).
British Transport Police (BTP) said no train passengers were hurt and the train was not derailed.
BBC: Train hits car on Great Coates level crossing killing two
Experts believe the recovered violin is a replica used for training, British Transport Police (BTP) said.
The BTP and legitimate operators now want much tougher legislation to make it easier for them.
The couple's hire car, a blue Fiat Stilo registration number 8588 BTP, is also missing.
British Transport Police (BTP) said the riders in Penrhyndeudraeth in Gwynedd also risked being prosecuted for trespass.
BBC: This cyclist was spotted carrying his bike along tracks
British Transport Police (BTP) said officers were called to Sandy Lane level crossing, Yarnton, at 15:40 GMT.
BBC: Man dies after car hit by train at Yarnton level crossing
British Transport Police (BTP) say such crimes are its top priority at the moment with the Easter holidays approaching.
They were arrested after officers from British Transport Police (BTP) observed them singing songs of a racially derogative nature.
Italy is launching a new four-year BTP Italia (an inflation-linked bond aimed at retail investors) between 15 April and 18 April.
Police asked people to report any trespassing by contacting the BTP on 0800 40 50 40 or Crimestoppers on 0800 555 111.
BBC: This cyclist was spotted carrying his bike along tracks
The 17:09 Pembroke Dock to Swansea service struck the vehicle at Manorbier in what British Transport Police (BTP) say was a "glancing blow".
British Transport Police (BTP) said it was working with LU to "reassure both staff and passengers" and check any future changes to procedures.
BBC: NEWS | UK | England | London | Probe into terrorist's Tube work
The 40-year-old was arrested on suspicion of manslaughter following the collision and released on bail while the British Transport Police (BTP) continued its investigation.
Network Rail has also been holding safety awareness days at level crossings, advising people how to use them safely, along with BTP and Arriva Trains Wales.
BBC: Level crossings: Wales safety work after 33 near misses
Insp Mike Edwards, of British Transport Police (BTP) in Cardiff, said most accidents at level crossings were down to impatience and a desire to "beat the train".
BBC: Level crossings: Wales safety work after 33 near misses
Based on intelligence and covert operations, "over the last couple of years much of the profit from this criminality is sent back to the heads of organized crime networks abroad, " a BTP spokesman said.
Some critics have denounced BTP Day as a ruse that deflects attention from the failure of politicians to get a grip on Italy's fiscal woes and that could imperil Italians' savings if the crisis worsens.
The 47-year-old car driver, from Grimsby, was confirmed dead at the scene of the automated half-barrier crossing on Woad Lane, while the other, a 40-year-old man from Cleethorpes, died on the way to hospital, BTP said.
"Monday promises to be a great day of football for Swansea fans, and our officers will be helping everyone to enjoy it, as well as ensuring fans travel to and from the game safely, " said BTP's sector commander for Wales, Ch Insp Sandra England.
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