Hybrid Pre-Signals
A hybrid pre-signal may also be used in which the pre-signal signal indications and the downstream traffic signal indications are both controlled by one traffic signal controller, but may have a more dynamic signal operation than a pure pre-signal. The hybrid pre-signal may change its operations based on time of day to improve the efficiency of the intersection operations. Operation modes that could be considered include using queue detection between the grade crossing and the downstream intersection that can operate the pre-signal as a queue cutter or a pre-timed operation where the pre-signal leads the downstream traffic signal indications to manage queues by providing queue prevention at the grade crossing at all times.