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Citation |
Sun X, Urbanik T, Skehan S, Ablett M. Transp. Res. Rec. 2008; 2080: 1-7. |
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Copyright |
(Copyright © 2008, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing) |
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DOI |
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PMID |
unavailable |
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Abstract |
Railroad preemption is intended to improve safety at highway—railway intersections by minimizing the likelihood that a vehicle will become trapped on the crossing. However, unless sufficient time is provided to transfer right-of-way safely from the currently operating highway traffic phase, preemption can cause safety problems for highway users. Advance preemption has been used to address right-of-way transfer time issues without making the railroad warning time excessively long. The use of advance preemption without proper precautions can lead to the preempt trap. A new approach that uses improved communication has been developed and implemented to address the needs of all users at and near the highway—railway intersection. The results of a field implementation in Los Angeles, California, demonstrate the effectiveness of the new approach. |