Train Stations, Rail Yards and Switching Trains
Where train stations, rail yards and/or train switching occurs in the railroad approaches there is potential for trains to be accelerating, decelerating, or stopping. These operations can cause traffic signals to enter and exit preemption without a train ever reaching the crossing. This can lead to driver confusion and frustration. If possible, railroad approaches for interconnected traffic signals should not extend into sidings or rail yards. TAT should be kept to a minimum at these locations to reduce the potential of having these elements in the approaches. If a switch or station is located inside the railroad approach, the ADV and XR circuits could energize at the same time. Where these elements cannot be avoided, the XR circuit shall be included in the interconnection. When the XR input is received the traffic signal shall immediately transition to track clearance green by serving the yellow and red clearance for any conflicting phases to begin clearing vehicles off the tracks as soon as possible. Queue management techniques should also be evaluated by the diagnostic team to provide queue prevention at all times and reduce the likelihood that vehicles are stopped on the tracks.