Editing Level crossing (section)

==Traffic signal preemption==
{{see also|Traffic signal preemption}}
[[Traffic signal]]-controlled intersections next to level crossings on at least one of the roads in the intersection usually feature [[traffic signal preemption]].<ref>[https://mutcd.fhwa.dot.gov/HTM/2003r1/part4/part4d.htm#section4D13 Section 4D.13] and [https://mutcd.fhwa.dot.gov/HTM/2003r1/part8/part8d.htm#section8D07 Section 8D.07] of the [[Manual on Uniform Traffic Control Devices]]</ref> In the US, approaching trains activate a routine where, before the road lights and barriers are activated, all traffic signal phases go to red, except for the signal immediately after the crossing, which turns green (or flashing yellow) to allow traffic on the tracks to clear (in some cases, there are auxiliary traffic signals prior to the railroad crossing which will turn red, keeping new traffic from crossing the tracks. This is in addition to the flashing lights on the crossing barriers). After enough time to clear the crossing, the signal will turn. The crossing lights may begin flashing and the barriers lower immediately, or this might be delayed until after the traffic light turns red.

The operation of a traffic signal, while a train is present, may differ from municipality to municipality. There are a number of possible arrangements:
#All directions will flash red, turning the intersection into an [[all-way stop]].
#While the train is passing, the traffic parallel to the railroad track will have a flashing yellow, while the other directions face a flashing red light.
#While the train is passing, the traffic parallel to the railroad track will have a green light, while the other directions face a red light.
#Traffic lights can operate relatively normally, with only the blocked direction turning red while the train is passing.