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[quote user="henry6"] I understand there is no law.  And I don't think a law could be written, implimented or enforeced either.  It is a matter of engineering the timing and of the expertise and ability of a driver.  If you see the warning and can stop, stop, if you can't stop, go through.  It is the "yellow light syndrome", yes, but it is part of the design and if you are going the right speed, you should be able to make a safe judgement and either stop or clear with safety.  And gates are usually down 10-15 seconds before the train enters the crossing.  Of course, the assumption here is that there are gates in addition to lights and bells. One of the ideas I've always thought of...I am not an engineer or inventor or whatever...is a strobe light curtain changing from clear to yellow to red as it "falls" across the roadway.  Another would be a concrete and steel wall which sets in the roadway flush but pops up three or four feet (red lights and or reflective paints) to prevent a vehicle from entering the track.   Or bigger and heavier "gate" drop to the roadway. <div style="clear:both;"></div> [/quote] I do not understand what you mean when you say there is no law.  Impassible solid barriers that rise out of the road have been considered quite extensively.  It is costly, but certainly feasible.  Believe it or not, the biggest official objection to the idea is the crash hazard it presents to drivers.  They don't want drivers to get killed by trains, but they also don't want drivers to get killed running into a wall. One thing I have thought about is locomotive-borne crossing signals.  It would consist of powerful strobe lights in an array that would be programed to target a road approach to a crossing.  They would adjust to the speed of the train so the lights would turn to shift their aim down the road as the train approaches the crossing.  This would be primarily intended to protect non-signalized crossings at a lower overall cost than adding signals and gates to them.
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