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
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.
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:
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:
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:
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:
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:
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 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.
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:
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:
Download or read book Transportation Research Record written by and published by . This book was released on 2003 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Human Factors Guidelines for Road Systems written by John L. Campbell and published by Transportation Research Board. This book was released on 2008 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: NCHRP report 600 explores human factors principles and findings for consideration by highway designers and traffic engineers. The report is designed to help the nonexpert in human factors to consider more effectively the roadway user's capabilities and limitations in the design and operation of highway facilities.
Download or read book Federal Highway Administration Research and Technology Program Highlights 1993 written by and published by . This book was released on 1994 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lawyers Desk Reference written by and published by . This book was released on 2001 with total page 1596 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guidelines for Dual advisory Speed Signing on Freeway to freeway Connectors in Texas written by Anthony P. Voigt and published by . This book was released on 2007 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Well-implemented public involvement programs have many potential benefits for transportation agencies including enhanced credibility with the public, decisions reflecting community values, and reduced risks of litigation (O'Connor et al., 2000). The objectives of this study included a broad assessment of the Virginia Department of Transportation's (VDOT's) public involvement practices and the development of a public involvement "toolkit" for use by VDOT staff. The toolkit describes an array of techniques that may be used from the earliest planning stages of transportation projects through their construction, noting advantages, disadvantages, special considerations in the use of each technique, and references and website links for further reading. The assessment of VDOT's current public outreach practices included information gathering from citizens and VDOT staff. A total of 948 citizens attending several types of VDOT meetings and hearings completed written surveys that included questions about how they prefer to be notified about upcoming VDOT meetings, how they prefer to be informed about projects, and how they prefer to be updated on the status of plans or projects. Focus groups and written "self evaluation" surveys provided information on the perceptions of VDOT staff about the effectiveness of VDOT's public involvement approaches and their suggestions for improving communication with the public and public involvement. Responses to the citizen and VDOT staff surveys indicated that the public is often unclear about the steps in VDOT's planning, project development, and public involvement processes. Citizens and VDOT staff also agreed that frequent updates on project status are desirable and that the public should get more feedback about how their input is really used in decision making. VDOT staff sees a need for more strategic communications planning and evaluation for major projects and more coordinated project communications within the agency. VDOT staff also believe that broader [staff] understanding of the responsibilities of different VDOT divisions in the project development process would improve communications within VDOT. Study recommendations include the following: VDOT staff should use the toolkit and a soon-to-be released interactive public involvement tool by the Federal Highway Administration to choose effective public involvement approaches; VDOT divisions should collaborate on ways to increase the public's understanding of the planning, project development, and public involvement processes; and as soon as the state budget situation permits, the Outreach Section of VDOT's Office of Public Affairs proposed by the Governor's Commission on Transportation Policy should be staffed to provide greater in-house strategic communications planning and evaluation capability for major projects
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:
