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Evaluation Of The Use Of Strobe Lights In The Red Lens Of Traffic Signals
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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 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:
Download or read book Transportation Research Record written by and published by . This book was released on 1997 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Field Evaluation of Innovative Active Warning Devices for Use at Railroad-highway Grade Crossings by : Kenneth W. Heathington
Download or read book Field Evaluation of Innovative Active Warning Devices for Use at Railroad-highway Grade Crossings written by Kenneth W. Heathington and published by . This book was released on 1988 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
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 Evaluation of the Effectiveness of Strobe Lights in Traffic Engineering Applications by : Deep Kumar Nohria
Download or read book Evaluation of the Effectiveness of Strobe Lights in Traffic Engineering Applications written by Deep Kumar Nohria and published by . This book was released on 1977 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Highway Research Abstracts written by and published by . This book was released on 1994 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis National Conference on Highway-rail Safety. 1985. Proceedings by : S. J. Richards (ed)
Download or read book National Conference on Highway-rail Safety. 1985. Proceedings written by S. J. Richards (ed) and published by . This book was released on 1985 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Evaluation of Traffic Signal Displays for Protected/permissive Left-turn Control by : Christopher Lynn Brehmer
Download or read book Evaluation of Traffic Signal Displays for Protected/permissive Left-turn Control written by Christopher Lynn Brehmer and published by Transportation Research Board. This book was released on 2003 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selection and Application of Warning Lights on Roadway Operations Equipment by : Ronald Bruce Gibbons
Download or read book Selection and Application of Warning Lights on Roadway Operations Equipment written by Ronald Bruce Gibbons and published by Transportation Research Board. This book was released on 2008 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB¿s National Cooperative Highway Research Program (NCHRP) Report 624: Selection and Application of Warning Lights on Roadway Operations Equipment explores recommended guidelines for the selection and application of warning lights on roadway operations equipment.
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 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 Traffic Control Devices, Visibility, and Railroad Grade Crossings by : National Research Council (U.S.). Transportation Research Board
Download or read book Traffic Control Devices, Visibility, and Railroad Grade Crossings written by National Research Council (U.S.). Transportation Research Board and published by . This book was released on 1997 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transportation Research Record 1495 contains the following papers: Effective use of variable message signs: Lessons learned through development of users' manuals; Motorist interpretation of yellow X and yellow diagonal arrow in freeway lane control signal array; Effects of pavement markings on driver behavior at freeway lane drop exits; Comparative study of advance warning signs at high speed signalized intersections; Evaluation of strobe lights in red lens of traffic signals; High-volume pedestrian crosswalk time requirements; Empirical analysis of traffic characteristics at two-way stop-controlled intersections in Alaska; Evaluation of proposed minimum retroreflectivity requirements for traffic signs; Detectability of pavement markings under stationary and dynamic conditions as a function of retroreflective brightness; Visibility of new yellow center stripes as a function of obliteration; Effects of lateral separation between double center-stripe pavement markings on visibility under nighttime driving conditions; Curve radius perception accuracy as function of number of delineation devices (Chevrons); Knowledge-based personal computer software package for applying and placing curve delineation devices; Visibility of new pavement markings at night under low-beam illumination; Loss of visibility distance caused by automobile windshields at night; Traffic sign reading distances and times during night driving; Yellow pavement markings with yellow nighttime color; Application of geographic information systems rail-highway grade crossing safety; Evaluation of accuracy of U.S. DOT rail-highway grade crossing accident prediction models.
Book Synopsis Human Factors Opportunities to Improve Ohio's Transportation System by :
Download or read book Human Factors Opportunities to Improve Ohio's Transportation System written by and published by . This book was released on 2005 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by Suzy J. Richards and published by . This book was released on 1985 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
