Originally Answered: Are there cameras at all railroad crossings? No - but that is going to change. For real-time operations of traffic, my area of expertise, cameras are essential to properly implementing traffic changes via signals and signage.
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Once you enter the crossing, keep moving. Stop 15 feet away from flashing red lights, lowered gates, a signaling flagman or a stop sign. Never drive around a lowering gate or ignore signals. After a train passes, wait for gates to fully rise and for all lights to stop flashing before your cross.
The term level crossing (also called a railroad crossing, a road through railroad, railway crossing, train crossing or grade crossing) is a crossing on one level (at-grade intersection) - without recourse to a bridge or tunnel - of a railway line by a road, path, or another railroad.
Yes, they detect vehicles and pedestrians. The one facing down towards the pavement detects if a pedestrian walks away after pressing the button, and cancels the lights changing.
At most crossings, the signals will activate about 30 seconds before the train arrives but there are sensors measuring speed so that the crossing knows when to activate; so, the slower the train is, the longer the delay and the faster the train is, the earlier the crossing activates.