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Evaluation Of Detection And Signing Systems For High Speed Signalized Intersections
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Book Synopsis Evaluation of Detection and Signing Systems for High Speed Signalized Intersections by : Prahlad D. Pant
Download or read book Evaluation of Detection and Signing Systems for High Speed Signalized Intersections written by Prahlad D. Pant and published by . This book was released on 1996 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of two dynamic signs that begin to flash a few seconds before the onset of the yellow interval and a static sign that flashes all the time were examined at tangent and curved approaches to rural, high speed signalized intersections. The dynamic signs included (a) a PTSWF (prepare to stop when flashing) sign, and (b) a FSSA (flashing symbolic signal ahead) sign with green, yellow, and red circles. The static sign was a CFSSA (continuously flashing symbolic signal ahead) sign with the three circles. The effects of these signs on vehicular speeds at different segments of the intersection approach including the dilemma zone were analyzed as were the vehicle conflict rates and the responses from the drivers' surveys.
Book Synopsis In-service Evaluation of a Detection-control System for High-speed Signalized Intersections by : Karl Zimmerman
Download or read book In-service Evaluation of a Detection-control System for High-speed Signalized Intersections written by Karl Zimmerman and published by . This book was released on 2005 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traffic engineers are often faced with operational and safety challenges at rural, high-speed signalized intersections. Vehicle-actuated control, combined with multiple advance detectors, is often used to improve operations and safety. However, this type of detection and control has not always resulted in a significant number of crashes. Crashes sometimes continue to occur at high-speed intersections, and delays to traffic movements can be unnecessarily long. An innovative detection-control system was developed for the Texas Department of Transportation to minimize both delay and crash frequency at rural intersections. This system was subsequently implemented at several intersections in Texas and its safety and operational benefits were evaluated. This report documents the findings and conclusions reached as a result of a three-year implementation project. The Detection-Control System was installed at each of eight intersections in Texas during the three-year period. Five of the intersections were suitable for a before-after study of safety and operational data. An evaluation of the before-after data indicated that the Detection-Control System was able to reduce delay by 14 percent, stop frequency by 9 percent, red-light violations by 58 percent, heavy-vehicle red-light violations by 80 percent, and severe crash frequency by 39 percent.
Book Synopsis Evaluation of Detector Placement for High-speed Approaches to Signalized Intersections by : Dan R. Middleton
Download or read book Evaluation of Detector Placement for High-speed Approaches to Signalized Intersections written by Dan R. Middleton and published by . This book was released on 1997 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Advance Warning Signals on High Speed Signalized Intersections by : Peter T. Martin
Download or read book Evaluation of Advance Warning Signals on High Speed Signalized Intersections written by Peter T. Martin and published by . This book was released on 2003 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Progress Report. 1987 by :
Download or read book FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Progress Report. 1987 written by and published by . This book was released on 1987 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1991 by :
Download or read book FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1991 written by and published by . This book was released on 1991 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nationally Coordinated Program of Highway Research, Development, and Technology by :
Download or read book Nationally Coordinated Program of Highway Research, Development, and Technology written by and published by . This book was released on 1987 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development and Evaluation of a Detection-control System for Rural Intersections by : James A. Bonneson
Download or read book Development and Evaluation of a Detection-control System for Rural Intersections written by James A. Bonneson and published by . This book was released on 2001 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Selected Video Detection Systems at Signalized Intersections by : Jeromy L. Grenard
Download or read book Evaluation of Selected Video Detection Systems at Signalized Intersections written by Jeromy L. Grenard and published by . This book was released on 2001 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of a Second Generation Detection-control System for Safer Operation of High Speed Signalized Intersections by : Karl H. Zimmerman
Download or read book Development of a Second Generation Detection-control System for Safer Operation of High Speed Signalized Intersections written by Karl H. Zimmerman and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This Innovations Deserving Exploratory Analysis project improved and evaluated a detection-control system (D-CS) for enhanced traffic safety at high speed signalized intersections. A literature review was conducted to identify potential enhancements to the D-CS control algorithm required to create the "second generation" D-CS algorithm. The needed enhancements included dilemma zone protection based on vehicle size, real-time dilemma zone changes, coordination, and real-time measures of effectiveness reporting. After selecting the most feasible enhancements, the control algorithm was modified and tested in the laboratory. Based on laboratory test results and refinements, a "second generation" D-CS control algorithm was developed capable of providing dilemma zone protection specific to vehicle type using a modified system to prevent max out during "Stage 2" operation.
Book Synopsis Advance Detection on High-speed Signalized Intersection Approaches by : Patrick T. McCoy
Download or read book Advance Detection on High-speed Signalized Intersection Approaches written by Patrick T. McCoy and published by . This book was released on 2002 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Accident Countermeasures at High-speed Signalized Intersections by : Ronald W. Eck
Download or read book Accident Countermeasures at High-speed Signalized Intersections written by Ronald W. Eck and published by . This book was released on 1984 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advance warning including flashing signs and strobe lights. Survey of traffic engineers at state and local agencies.
Book Synopsis Intelligent Detection-control System for Rural Signalized Intersections by :
Download or read book Intelligent Detection-control System for Rural Signalized Intersections written by and published by . This book was released on 2002 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Signalized Intersection for Experimentation and Evaluation of Traffic Signal and Detection System Technology by : Kelvin R. Santiago-Chaparro
Download or read book A Signalized Intersection for Experimentation and Evaluation of Traffic Signal and Detection System Technology written by Kelvin R. Santiago-Chaparro and published by . This book was released on 2012 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Intersection Decision Support written by and published by . This book was released on 2006 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project entailed the design, development, testing, and evaluation of intersection decision support (IDS) systems to address straight crossing path (SCP) intersection crashes. This type of intersection crash is responsible for more than 100,000 crashes and thousands of fatalities each year. In developing these IDS systems for both signalized and stop-controlled intersections, a top-down systems approach was used that determined the necessary system functions and evaluated the capability of different technologies to perform those functions. Human factors tests were also conducted that evaluated the effectiveness of warning algorithms and infrastructure-based driver-infrastructure interfaces in eliciting a stopping response from drivers about to be involved in an SCP intersection crash. Results indicated that further technological development is needed for the sensing and intersection state IDS functions. Furthermore, infrastructure-based warning interfaces tested were greatly outperformed by previously-tested in-vehicle warnings. Thus, future research on IDS systems should focus on their infrastructure-cooperative configuration, where the system supports an in-vehicle warning.
Book Synopsis Guidelines for Detector Placement on High-speed Approaches to Signalized Intersections by :
Download or read book Guidelines for Detector Placement on High-speed Approaches to Signalized Intersections written by and published by . This book was released on 1997 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this research was to validate the new TxDOT procedures for loop detector placement on high-speed approaches to signalized intersections. The study approach involved conducting a field study at selected sites to compare the proposed new loop configuration to the existing configuration. The data analysis included investigating approach speeds to the intersection, driver actions in response to a yellow indication, and vehicle location at the onset of yellow. The Results from the field study revealed that the new loop configuration is as good as, and in some cases better than the old loop configuration. Because the new loop configuration can detect vehicles further upstream from the intersection (at the beginning of the dilemma zone), it results in fewer vehicles being caught in the dilemma zone at the onset of yellow. Also, because the new loop configuration typically resulted in more vehicles running the yellow light instead of stopping, fewer rear-end accidents may result. In addition, the new loop configuration resulted in fewer vehicles running the red light, also a major cause of accidents.
Book Synopsis Evaluation of Vehicle Detection Systems for Traffic Signal System Operations by : Riannon L. Zender
Download or read book Evaluation of Vehicle Detection Systems for Traffic Signal System Operations written by Riannon L. Zender and published by . This book was released on 2016 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Typical vehicle detection systems used in traffic signal operations are comprised of inductive loop detectors. Because of costs, installation challenges, and operation and maintenance issues, many alternative "non-intrusive" systems have been developed and are now commercially available. Field-testing was conducted to evaluate eight alternative vehicle detection systems (four video, one radar, one infrared, and two hybrid) at the stop bar zone of a signalized intersection under six conditions: (a) daytime, (b) nighttime, (c) favorable conditions, (d) windy conditions, (e) rain, and (f) snow. With several exceptions, performance generally degraded in nighttime when compared with day light conditions, and in adverse versus favorable weather conditions. In general, radar and hybrid systems performed with the greatest accuracy.
