57. The most serious defect from the safety point of view to be revealed by the investigation carried out by the Transport and Road Research Laboratory was the almost total disregard by pedestrians of the twin red flashing lights and the audible warning that a train was approaching the level crossing. There is no doubt [hat this wide scale disobedience is largely due to the excessively long 'crossing closed' time. coupled with the fact that people are leaving the station and wishing to traverse the crossing while the train.is still standing in the station and road traffic is halted. From my comments in paragraph 55 above, I am satisfied that the arrangements have been improved as far as is reasonably practicable to eliminate the excessive 'crossing closed' times with platforms on the immediate approaches to AOCL. I am by no means satisfied, however, that the introduction of further AOCL adjacent to stations, whether on the Metro, British Railways or any other railway, should not, wherever possible, be sited immediately before the platform and not immediately after it, thus eliminating any reason for excessive crossing times. If this is unacceptable, I consider that the only safe alternative is to arrange that the driver of a train, having completed station duties, operates a plunger to initiate the steady amber and twin red flashing lights and, after a delay that ensures that the road traffic signals have been showing for the correct time, the protecting signal will clear or the white light flash. The latter, in my opinion, will not stop regular crossing users from learning that they can traverse the crossing while the train is stationary in the platform and thus 1 consider this arrangement to be less acceptable than the crossing on the approach to the platform, where there need be no excessive delay whatsoever.