EBookClubs

Read Books & Download eBooks Full Online

EBookClubs

Read Books & Download eBooks Full Online

Book In service Evaluation of a Detection control System for High speed Signalized Intersections

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 Evaluation of Detection and Signing Systems for High Speed Signalized Intersections

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 Development of a Second Generation Detection control System for Safer Operation of High Speed Signalized Intersections

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 Evaluation of Selected Video Detection Systems at Signalized Intersections

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 Guidelines for Detector Placement on High speed Approaches to Signalized Intersections

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 Vehicle Detector Placement for High speed Isolated Traffic actuated Intersection Control Final Report Prepared for Federal Highway Administration Offices of Research and Development

Download or read book Vehicle Detector Placement for High speed Isolated Traffic actuated Intersection Control Final Report Prepared for Federal Highway Administration Offices of Research and Development written by and published by . This book was released on 1977 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study was undertaken to improve understanding of how to place vehicle detectors at high-speed (at least 35 mph), isolated, traffic-actuated intersections, and how to test and evaluate alternative detector/controller configurations for intersection traffic safety and efficiency.

Book Traffic Control Systems Handbook

Download or read book Traffic Control Systems Handbook written by and published by . This book was released on 1976 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Design and Evaluation of an Advisory Speed Signal System for a High speed Intersection Under Traffic actuated Control

Download or read book The Design and Evaluation of an Advisory Speed Signal System for a High speed Intersection Under Traffic actuated Control written by Charles E. Dare and published by . This book was released on 1969 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Placement of Detection Loops on High Speed Approaches to Traffic Signals

Download or read book Placement of Detection Loops on High Speed Approaches to Traffic Signals written by and published by . This book was released on 2010 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains the results of the NC Department of Transportation research project Placement of Detection Loops on High Speed Approaches to Traffic Signals (HWY 2007-13). The goal of this project was to determine the best places to locate detectors on the approaches to high-speed signalized intersections and the best signal control strategy to employ in conjunction with those sensor placement ideas to minimize dilemma zone occurrences.

Book A Signalized Intersection for Experimentation and Evaluation of Traffic Signal and Detection System Technology

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: