mid-states highway-rail crossing safety conference larry j. colclasure, p.e

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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 District [email protected]

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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 District [email protected]. Dallas Ft Worth. Austin. Waco District. Fort Hood. Waco. Temple Killeen. Copperas Cove. - PowerPoint PPT Presentation

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Page 1: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

Mid-States Highway-Rail Crossing Safety Conference

Larry J. Colclasure, P.E.Director of Transportation OperationsTexas Department of Transportation

Waco District

[email protected]

mailto:[email protected]

Page 2: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

WacoDistrict

Dallas Ft Worth

Austin

Page 3: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

Waco

Temple Killeen

Fort Hood

Copperas Cove

Page 4: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

Page 5: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

Page 6: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

Requires cooperation between agencies

Dependent on others Catastrophic results when things

don’t go according to plan

Key Concerns with Preemption:

Page 7: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

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

Page 8: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

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

Page 9: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

Waco

Temple Killeen

Fort Hood

Copperas Cove

Page 10: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

Copperas Cove, Texas

Page 11: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

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Pedestrian Issues to Consider:

How to account for pedestrians. How to handle ped walk time? How to handle ped clearance time?

Page 20: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

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?

Page 21: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

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?

Page 22: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

Page 23: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

Recent TxDOT Research on Preemption

0-4265 Improved Traffic Signal Operation near Railroad Grade Crossings with Active Devices

0-4746 Non-Vital Advance Rail Preemption of Signalized Intersections near Highway –Rail Grade Crossings

0-5629 Best TxDOT Practices for Signal Timing & Detection Design at Intersection

Page 24: Mid-States Highway-Rail Crossing Safety Conference Larry J. Colclasure, P.E

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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