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Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E. Director of Transportation Operations Texas Department of Transportation Waco.

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Presentation on theme: "Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E. Director of Transportation Operations Texas Department of Transportation Waco."— Presentation transcript:

1 Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E. Director of Transportation Operations Texas Department of Transportation Waco District

2 Waco District Dallas Ft Worth Austin

3 Waco Temple Killeen Fort Hood Copperas Cove

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6  Requires cooperation between agencies  Dependent on others  Catastrophic results when things don’t go according to plan Key Concerns with Preemption:

7 Other Key Concerns with Preemption:  Tools not available to assist.  Static (factors do not change).  Infrequent occurrences.

8 It equals a continual relearning process and a poor understanding by many technicians and engineers.

9 Waco Temple Killeen Fort Hood Copperas Cove

10 Copperas Cove, Texas

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19 Pedestrian Issues to Consider:  How to account for pedestrians.  How to handle ped walk time?  How to handle ped clearance time?

20 Vehicular Issues to Consider:  How much time is needed to clear the queue?  How much time is needed for track clearance green?  Is preemption affected by the signal being in different phases?  What is preemption delay time?

21 Railroad Issues to Consider:  How much preemption time do I need?  How much advance preemption time is needed?  How much total preemption time do I have available?

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23 Recent TxDOT Research on Preemption  Improved Traffic Signal Operation near Railroad Grade Crossings with Active Devices  Non-Vital Advance Rail Preemption of Signalized Intersections near Highway –Rail Grade Crossings  Best TxDOT Practices for Signal Timing & Detection Design at Intersection

24 Recent Tools Developed:  LADOT Preemption Form with Gate Interaction (Sean Skehan)  Texas Signal Coordination Optimization [Preemption page] (Michael Pratt & James Bonneson)


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