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An Analysis Of Red Lens Strobe Signals And Their Effect On Reducing Right Angle Traffic Accidents
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Book Synopsis An Analysis of Red Lens Strobe Signals and Their Effect on Reducing Right Angle Traffic Accidents by : Tim Luttrell
Download or read book An Analysis of Red Lens Strobe Signals and Their Effect on Reducing Right Angle Traffic Accidents written by Tim Luttrell and published by . This book was released on 1999 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of the Use of Strobe Lights in the Red Lens of Traffic Signals by : Benjamin H. Cottrell
Download or read book Evaluation of the Use of Strobe Lights in the Red Lens of Traffic Signals written by Benjamin H. Cottrell and published by . This book was released on 1994 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to evaluate the effectiveness of using strobe lights in the red lens of traffic signals and, if appropriate, to recommend guidelines for their use. Strobe lights are used as a supplement to the red lens to draw the attention of drivers to a traffic signal. VDOT has 22 intersections with strobe lights in six of its nine districts; this is up from 3 intersections in 1987. Nineteen of these are in the western part of the state, and most have the strobe light in the red signal over the left through lane. The Barlo strobe light, a horizontal bar positioned across the middle of the red lens with about 60 flashes of white light per minute, is used at all 22 intersections. The cost of a red signal head with a Barlo strobe light is about $765. Strobe lights are used by VDOT primarily for (1) areas with a high truck volume and high speed; (2) areas with a high accident rate; (3) areas with road geometrics, especially grades (downgrade), horizontal curves, and other features, that result in limited sight distance; and (4) isolated intersections where a signal is unexpected. Based on the analyses, there was no evidence indicating that strobe lights are consistently effective in reducing accidents. The limitations of the analyses are identified in the study. There is no basis for recommending the use of strobe lights unless there are other bona fide measures of effectiveness that can be used to justify installing them.
Book Synopsis Evaluation of the Flashing Red Strobe Signal by : Wayne J. Styles
Download or read book Evaluation of the Flashing Red Strobe Signal written by Wayne J. Styles and published by . This book was released on 1982 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Safety Evaluation of Red-light Indicator Lights (RLILs) at Intersections by : Scott Himes
Download or read book Safety Evaluation of Red-light Indicator Lights (RLILs) at Intersections written by Scott Himes and published by . This book was released on 2017 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Development of Crash Modification Factors program conducted the safety evaluation of red-light indicator lights (RLILs) at intersections for the Evaluation of Low-Cost Safety Improvements Pooled Fund Study. This study evaluated safety effectiveness of RLILs. RLILs are auxiliary lights mounted on signal heads, mast arms, or poles that are directly connected to a traffic-control signal. The RLIL activates at the onset of the red phase and allows an enforcement officer to observe red-light running from downstream of the intersection. This strategy is intended to reduce the frequency of crashes resulting from drivers disobeying traffic signals by providing a safer and more efficient means for police to enforce the red interval. Geometric, traffic, and crash data were obtained at treated four-legged signalized intersections in Florida. To account for potential selection bias and regression-to-the-mean, an empirical Bayes before–after analysis was conducted using reference groups of untreated four-legged signalized intersections with characteristics similar to those of the treated sites. The analysis also controlled for changes in traffic volumes over time and time trends in crash counts unrelated to the treatment. Results indicate statistically significant crash reductions for most crash types. Disobeyed signal crashes had an estimated crash modification factor (CMF) of 0.71. Total crashes, fatal and injury crashes, right-angle, and left-turn crashes had estimated CMFs of 0.94, 0.86, 0.91, and 0.60, respectively. The benefit-cost ratio estimated with conservative cost and service life assumptions was 92:1 for four-legged signalized intersections. The results suggest that the treatment, even with conservative assumptions on cost, service life, and the value of a statistical life, can be cost effective. In addition to the crash-related benefits, RLILs can improve the efficiency and safety of red-light running enforcement efforts. While this study did not evaluate the efficiency and safety impacts with respect to enforcement, it should be noted that RLILs do allow police to observe violators from a downstream position, eliminating the need for a second observer (upstream) and the need to pursue a violator through the red light.
Book Synopsis Safety Evaluation of Red-light Cameras by : Forrest M. Council
Download or read book Safety Evaluation of Red-light Cameras written by Forrest M. Council and published by . This book was released on 2005 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental objective of this research was to determine the effectiveness of red-light-camera (RLC) systems in reducing crashes. The study involved an empirical Bayes (EB) before-after research using data from seven jurisdictions across the United States to estimate the crash and associated economic effects of RLC systems. The study included 132 treatment sites, and specially derived rear end and right-angle unit crash costs for various severity levels. Crash effects detected were consistent in direction with those found in many previous studies: decreased right-angle crashes and increased rear end ones. The economic analysis examined the extent to which the increase in rear end crashes negates the benefits for decreased right-angle crashes. There was indeed a modest aggregate crash cost benefit of RLC systems. A disaggregate analysis found that greatest economic benefits are associated with factors of the highest total entering average annual daily traffic (AADT), the largest ratios of right-angle to rear end crashes, and with the presence of protected left-turn phases. There were weak indications of a spillover effect that point to a need for a more definitive, perhaps prospective, study of this issue.
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 The Effect of Right-turn-on Red on Traffic Performance and Accidents at Signalized Intersections by : James C. Ray
Download or read book The Effect of Right-turn-on Red on Traffic Performance and Accidents at Signalized Intersections written by James C. Ray and published by . This book was released on 1956 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transportation Research Record written by and published by . This book was released on 1992 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of the Use of Strobe Lights in the Red Lens of Traffic Signals. Technical Assistance Report by : B. H. Cottrell (Jr)
Download or read book Evaluation of the Use of Strobe Lights in the Red Lens of Traffic Signals. Technical Assistance Report written by B. H. Cottrell (Jr) and published by . This book was released on 1994 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Association of Selected Intersection Factors with Red-light-running Crashes. Summary Report. Highway Safety Information System by : Yusuf M. Mohamedshah
Download or read book Association of Selected Intersection Factors with Red-light-running Crashes. Summary Report. Highway Safety Information System written by Yusuf M. Mohamedshah and published by . This book was released on 2000 with total page 10 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 Making Intersections Safer by : Hugh W. McGee
Download or read book Making Intersections Safer written by Hugh W. McGee and published by . This book was released on 2003 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impact of Red Light Camera Enforcement on Crash Experience by : Hugh W. McGee
Download or read book Impact of Red Light Camera Enforcement on Crash Experience written by Hugh W. McGee and published by Transportation Research Board. This book was released on 2003 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: At head of title: National Cooperative Highway Research Program.
Book Synopsis Safety Impact of Permitting Right-turn-on-red by : Richard P. Compton
Download or read book Safety Impact of Permitting Right-turn-on-red written by Richard P. Compton and published by . This book was released on 1994 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Energy Policy Act of 1992 required NHTSA to conduct a study of the safety impact of permitting right and left turns on red lights. The report presents a brief summary of the current status of State implementation of laws permitting right and left turns at red lights, a brief review of previous research, and the results of analyses of currently available data assessing the safety impact of permitting right turns on red.
Book Synopsis Review and Evaluation of Enforcement Issues and Safety Statistics Related to Red-light-running by : James A. Bonneson
Download or read book Review and Evaluation of Enforcement Issues and Safety Statistics Related to Red-light-running written by James A. Bonneson and published by . This book was released on 2003 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this research project are to: (1) quantify the safety impact of red-light-running at intersections in Texas, and (2) provide guidelines for identifying truly problem intersections and whether enforcement or engineering countermeasures are appropriate. This report documents the findings from the first year of a two-year project. During the first year, data were collected to quantify the character and extent of red-light violations and related crashes in Texas. Data were also collected to quantify the effectiveness of intersection traffic control enforcement. The findings from a review of the literature on red-light-running and an analysis of red-light-running crash data are included in this report. A procedure for identifying and quantifying red-light-running-related crashes is described.
Book Synopsis Right-turn-on-red by : Alan M. Voorhees & Associates
Download or read book Right-turn-on-red written by Alan M. Voorhees & Associates and published by . This book was released on 1976 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Right-turn-on-a-red traffic signal (RTOR) is a practice which has gained wider acceptance and use by the states in the last few years. However, there is still disagreement on whether, where, and how RTOR should be implemented. Accordingly, the objectives of this study were to determine whether permitting RTOR is desirable and to prepare guidelines for determining inclusion or exclusion of this movement. The study scope included field data collection and computer simulation analyses, accident analyses, driver and pedestrian attitude surveys, legal and law enforcement analyses, and a signing needs evaluation.
Book Synopsis Light Rail Vehicle Collisions with Vehicles at Signalized Intersections by : Kelley Klaver Pecheux
Download or read book Light Rail Vehicle Collisions with Vehicles at Signalized Intersections written by Kelley Klaver Pecheux and published by Transportation Research Board. This book was released on 2009 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the mitigation methods tested and used by transit agencies to reduce collisions between light rail vehicles (LRVs) and motor vehicles where light rail transit (LRT) runs through or adjacent to highway intersections controlled by conventional traffic signals. A particular focus is placed on collisions occurring between LRVs and vehicles making left-hand turns at these intersections. This report offers success stories and specific actions to achieve positive results, as well as examples of unsuccessful actions. The issues addressed include a range of LRT operations and environments such as median-running, side-running, contra-flow, and mixed-use LRT alignments; urban and suburban setting; and a variety of U.S. geographic regions.
