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Non-vital advance rail preemption of signalized intersections near highway-rail grade crossings
Technical report examining two strategies were investigated to ensure pedestrian clearance time in intersections near highway-rail grade crossings. The first utilizes a lower-level preemption sequence to guarantee full pedestrian clearance to a terminating phase before the traffic signal starts the preemption sequence. The second strategy uses the pedestrian-omit feature to prevent the controller from activating the pedestrian interval if there is not sufficient time in advance of the start of the preemption sequence to provide full pedestrian clearance.
Date:
June 2007
Creator:
Balke, Kevin N.; Engelbrecht, Roelof Johannes & Ruback, Leonard G.
System:
The Portal to Texas History
Archaeological Survey within the City of Azle's Central Park
An archaeological survey within the central park of the City of Azle for the proposed construction of two soccer fields, two basketball courts, a parking lot, and a narrow trail.
Date:
June 7, 2007
Creator:
Todd, Jesse
System:
The Portal to Texas History
Groundwater Resource Evaluation and Availability Model of the Gulf Coast Aquifer in the Lower Rio Grande Valley of Texas
This report describes the construction and calibration of the numerical groundwater availability model for the Gulf Coast Aquifer in the Lower Rio Grande Valley and presents predictive groundwater results through 2050, using pumping projections provided by the regional water planning groups for the 2002 State Water Plan.
Date:
June 2007
Creator:
Texas Water Development Board
System:
The Portal to Texas History