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A Study Of Selected Warning Devices For Reducing Truck Speeds
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Book Synopsis A Study of Selected Warning Devices for Reducing Truck Speeds by : Dan R. Middleton
Download or read book A Study of Selected Warning Devices for Reducing Truck Speeds written by Dan R. Middleton and published by . This book was released on 1994 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing effective roadside warning devices for drivers of large trucks is critical on freeway connectors where speeds are relatively high but design speeds may be substantially less than on mainlanes. Identifying and testing appropriate methods of monitoring traffic on freeway connectors was also included in this research. Two monitoring systems evolved, one using roadway sensors and the other using roadside sensors. Roadway sensors consisted of both piezoelectric and inductive loop sensors, while roadside sensors applied infrared sensor technology. The roadway warning devices tested can be categorized as passive devices and active devices. Passive devices consisted of "truck tipping" warning signs, while the active device consisted of flashing lights mounted one above and one below a set of passive truck tipping signs on both sides of the roadway. Speed reduction, as associated with accident reduction, was the ultimate goal of these tests. The null hypothesis tested by ANOVA of no treatment effect in the presence of initial speed was rejected in all but one of four models, using the probability of a Type I error, $\\\\alpha, $ equal 0.05. Speed reductions due to the active system were significant in AC and BC data sets, but not in AB data sets, suggesting that truck driver response to the lights occurred downstream of Location B. Truck weights were not significant in any tenable test results, and separation of trucks into the categories of combination and non-combination trucks, peak/off-peak periods, and day/night/dusk periods was not helpful in understanding variations in truck speeds. Cumulative speed distributions showed that the fastest trucks decreased their speeds by approximately 2 to 3 mph (3 to 5 kph) during the test period. Five of the seven single-vehicle truck accidents that were recorded on the I-610/US-59 connector in an 8 1/2 year period that were speed-related resulted in rollover. None occurred after installation of warning treatments being tested, although there were other prior years with no recorded accidents
Book Synopsis Development and Evaluation of an Active Warning Device for School Bus Loading and Unloading Points in Areas of Limited Visibility by :
Download or read book Development and Evaluation of an Active Warning Device for School Bus Loading and Unloading Points in Areas of Limited Visibility written by and published by . This book was released on 2005 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objectives of this research project were: (1) to develop an active advance warning device (AAWD) comprised of an actuated flashing beacon supplement to a conventional SCHOOL BUS STOP AHEAD sign (S3-1) and (2) to evaluate its effect on driver performance and safety through school bus loading and unloading zones. Secondary objectives were to summarize system components and costs, develop an activation strategy, review the liability risk, review national experience related to safety, and provide guidance regarding specifications and use in Texas. With respect to safety, 37 of 46 studies reported a positive effect resulting from AAWDs. Findings from field studies conducted in Texas also suggest favorable results with confirmed reductions in vehicle approach speeds when the flashing beacon was activated. Costs for the final AAWD are estimated to be 2,000 dollars for the S3-1 sign and flashing beacons and 2,600 dollars for the flashing beacon activation system, not including sign installation or ongoing maintenance and operations costs. A review of published literature and historic case law suggests minimal additional liability risk above what is already experienced by transportation departments. Unique areas of risk relate to "jurisdictional responsibility" for establishing, operating, and maintaining school bus loading and unloading zones and the hazard expectation tied to the flashing beacon activation (i.e., motorists may not exercise the same degree of caution when the bus is not present and the beacons are not flashing despite children being present at the bus stop). Given the favorable safety impacts, the low system cost, and the minimal additional liability risk incurred, the AA WD is recommended for further implementation.
Book Synopsis Analysis & Summary of Accident Investigations, 1973-1976 by : United States. Bureau of Motor Carrier Safety
Download or read book Analysis & Summary of Accident Investigations, 1973-1976 written by United States. Bureau of Motor Carrier Safety and published by . This book was released on 1977 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1994 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Truck Safety Research by : National Research Council (U.S.). Transportation Research Board
Download or read book Truck Safety Research written by National Research Council (U.S.). Transportation Research Board and published by . This book was released on 1999 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Public Roads written by and published by . This book was released on 1997 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Safety Effectiveness of Advance Warning Signs on Mountain Pass Downgrades by : Mustaffa Raja
Download or read book Safety Effectiveness of Advance Warning Signs on Mountain Pass Downgrades written by Mustaffa Raja and published by . This book was released on 2018 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mountain passes increase the risk of a runaway, or out of control trucks. Advance warning signs inform the driver to take special precautions such as reducing speed or using lower gears during the descent. The Wyoming Department of Transportation has installed steep grade advance warning systems on Wyoming mountain passes. However, concerns for out of control trucks on mountain passes are still ongoing. Hence, a supplementary study is necessary to enhance safety and effectiveness of the preexisting warning systems. Quantitative data of truck crashes on downgrades throughout the state of Wyoming were investigated; five representative downgrades were selected for investigating the effectiveness of warning signs, namely, WY-22 (Teton Pass), WY-14 & 16 in the Bighorn Mountains, as well as WY-28 (South Pass). The purpose of this study is to explore the effectiveness of advanced warning signs on mountain pass downgrades with respect to truck-related crash events and to discuss a safety evaluation study of Wyoming mountain passes and to make recommendations for improving the warning systems used to alert drivers to take special precautions on steep downgrades. A propensity score was estimated in order to quantify the effectiveness of warning signs on downgrades. The study found that the estimated probability of a truck crash occurring on untreated sites is 1.3 higher than treated sites based on matching propensity scores. Individual sign types were also investigated by negative binomial modeling for truck and all vehicle crashes. Chevron and trucker warning signs were found to be significant predictors in decreasing the frequency of crashes. GIS maps of warning sign and truck crash hotspots were generated for areas selected by performance measures listed in HSM. These maps were used to analyze the current warning sign system and several recommendations from the MUTCD were given.
Book Synopsis A Guide for Reducing Speeding-Related Crashes by :
Download or read book A Guide for Reducing Speeding-Related Crashes written by and published by Transportation Research Board. This book was released on 2009 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Texas Transportation Researcher by :
Download or read book Texas Transportation Researcher written by and published by . This book was released on 1995 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Truck Accommodation Design Guidance: Final Report by : Dan R. Middleton
Download or read book Truck Accommodation Design Guidance: Final Report written by Dan R. Middleton and published by . This book was released on 2003 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidelines for Selection of Speed Reduction Treatments at High-speed Intersections by : Brian Ray
Download or read book Guidelines for Selection of Speed Reduction Treatments at High-speed Intersections written by Brian Ray and published by Transportation Research Board. This book was released on 2008 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB¿s National Cooperative Highway Research Program (NCHRP) Report 613: Guidelines for Selection of Speed Reduction Treatments at High-Speed Intersections explores the effectiveness of geometric design features as well as signage and pavement markings to reduce vehicle speeds at high-speed intersections.
Author :United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations Publisher : ISBN 13 : Total Pages :1180 pages Book Rating :4.:/5 ( download)
Book Synopsis Department of Transportation and Related Agencies Appropriations for 1994: Department of Transportation: Federal Highway Administration by : United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations
Download or read book Department of Transportation and Related Agencies Appropriations for 1994: Department of Transportation: Federal Highway Administration written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations and published by . This book was released on 1993 with total page 1180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Highway Safety Literature written by and published by . This book was released on 1982 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1995 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1995 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis R & D Highway & Safety Transportation System Studies by : United States. Federal Highway Administration
Download or read book R & D Highway & Safety Transportation System Studies written by United States. Federal Highway Administration and published by . This book was released on 1970 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations Publisher : ISBN 13 : Total Pages :1188 pages Book Rating :4.0/5 (18 download)
Book Synopsis Department of Transportation and Related Agencies Appropriations for 1994 by : United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations
Download or read book Department of Transportation and Related Agencies Appropriations for 1994 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations and published by . This book was released on 1993 with total page 1188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
