Could someone explain why and how crossbuck lights & bars (not track signals) could benefit from a directional detection. I can only seem to focus on the fact that if the space between A&B is occupied, both crossbuck signals should activate. Speed doesn't even really matter; on slow days you wait longer to cross. That is what I've observed on the real rails. I even knew the exact A&B spots for crossings near me; fast or slow they triggered the crossbucks at the same spot every day.
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