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| Author | : |
| Publisher | : |
| Total Pages | : 160 |
| Release | : 2005 |
| Genre | : Highway-railroad grade crossings |
| ISBN | : |
| Author | : Hans W. Korve |
| Publisher | : Transportation Research Board |
| Total Pages | : 100 |
| Release | : 1999 |
| Genre | : Technology & Engineering |
| ISBN | : 9780309068246 |
Presents a review of the current practices associated with the operation of traffic signals at intersections located near highway-rail grade crossings.
| Author | : Institute of Transportation Engineers. Traffic Engineering Council. Joint Rail Grade Crossing Committee |
| Publisher | : |
| Total Pages | : 80 |
| Release | : 2019 |
| Genre | : Electronic traffic controls |
| ISBN | : 9781933452975 |
The Institute of Transportation Engineers (ITE) prepared this report to reflect the current state-of-the-practice and to provide the user with a broad overview of key considerations for the preemption of traffic signals near railroad grade crossings. Where a signalized intersection exists in close proximity to a railroad crossing and either queues from the intersection impact the crossing or queues from the crossing impact the intersection, the railroad signal control equipment and the highway traffic signal control equipment should be interconnected. The normal operation of the traffic signals controlling the intersection should be preempted to operate in a special control mode when trains are approaching. This proposed recommended practice was written primarily for an audience of engineers working for public agencies, railroads, and public transit agencies engaged in signal design and operational timing. The objective of this proposed revision is to include new information on the design and operation of traffic signal preemption that has been learned since the previous edition was published.
| Author | : Steven P. Venglar |
| Publisher | : |
| Total Pages | : 68 |
| Release | : 2000 |
| Genre | : Railroad accidents |
| ISBN | : |
| Author | : United States. Dept. of Transportation. Grade Crossing Safety Task Force |
| Publisher | : |
| Total Pages | : 148 |
| Release | : 1997 |
| Genre | : Highway-railroad grade crossings |
| ISBN | : |
| Author | : Kenneth W. Heathington |
| Publisher | : |
| Total Pages | : 288 |
| Release | : 1988 |
| Genre | : Highway-railroad grade crossings |
| ISBN | : |
Research was conducted to identify and evaluate innovative active warning devices with potential for improving safety at railroad-highway grade crossings. Candidate devices were identified and/or developed, and the most promising devices were evaluated in a detailed laboratory study. Three of the devices were chosen for field evaluation: (1) four-quadrant gates with skirts and flashing light signals; (2) four-quadrant flashing light signals with overhead strobes; and (3) highway traffic signals with white bar strobes in all red lenses. The report documents the methodology and results of the field evaluations, presents a summary of the research leading up to the field evaluations, and presents the results of benefit-cost analyses for the innovative devices and guidelines for their implementation.
| Author | : Leonard Ruback |
| Publisher | : |
| Total Pages | : 124 |
| Release | : 2004 |
| Genre | : Highway-railroad grade crossings |
| ISBN | : |
The Texas Department of Transportation (TxDOT) primarily uses simultaneous preemption of traffic signals near highway-rail grade crossings to clear queued vehicles prior to the arrival of a train at the crossing. At some intersections, 20 seconds of advanced warning may not be sufficient to allow the traffic signal to clear pedestrians using the normal clearance intervals between phases. The research developed an alternative method (non-vital advance preemption) of ensuring adequate pedestrian clearance in the presence of an approaching train without interfering with the normal preemption sequence at the intersection or installing costly additional track circuitry needed to provide advance preemption. Two strategies were investigated to ensure pedestrian clearance time. 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.
| Author | : Institute of Transportation Engineers. Traffic Engineering Council. Joint Rail Grade Crossing Committee |
| Publisher | : |
| Total Pages | : 67 |
| Release | : 2021 |
| Genre | : Electronic traffic controls |
| ISBN | : 9781734507836 |
ITE prepared this recommended practice to reflect the current state-of-the-practice and provide the user with a broad overview of key considerations for the preemption of traffic signals near railroad grade crossings. In these locations the railroad signal control equipment and the roadway traffic signal control equipment should be interconnected and normal operation of the traffic signals controlling the intersection should be preempted to operate in a special control mode when trains are approaching. The report is written primarily for an audience of engineers working for public agencies, railroads and public transit agencies engaged in signal design and operational timing.
| Author | : Neil D. Lerner |
| Publisher | : Transportation Research Board |
| Total Pages | : 49 |
| Release | : 2002 |
| Genre | : Highway capacity |
| ISBN | : 0309067510 |
| Author | : R. J. Ruden |
| Publisher | : |
| Total Pages | : 276 |
| Release | : 1977 |
| Genre | : Railroad crossings |
| ISBN | : |
This report describes a two-year study of some of the basic problems involved in improving the design of active warning devices intended to make motorists more aware of grade crossing hazards. Emphasis was placed upon improvement of the attention-getting aspect (conspicuity) of active crossing warning devices which was presumed to positively correlate with improvements in grade crossing safety. An indoor laboratory test was conducted in the FAA Low Visibility Research Facility located at the University of California. In excess of 150 subjects gave over 20,000 responses to flashing light displays. Results were analyzed to determine effects of color, flash rate, brightness, size and placement under daylight, darkness and daytime fog conditions. The laboratory tests resulted in development of two improved devices which were field tested on actual grade crossings. The first device consisted of an array of three eight-inch white (clear) strobe lights added to a standard flashing warning system at a high accident rate urban crossing in Richmond, CA. The second was a gate arm add-on device consisting of three small strobes, red, white (clear) and blue in color installed at a rural highway grade crossing with high speed truck and automobile traffic.
