Assertion: railroad's train | /r/CapableOf | activate routine
Facets:
value: except for the signal
type: OTHER
Source sentences:
text: Approaching trains activate a routine where, before the train signals and gates are activated, all traffic signal phases go to red, except for the signal immediately after the train 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.