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The Safety And Cost Effectiveness Of Bridge Approach Guardrail For County State Aid Csah Bridges In Minnesota
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Book Synopsis The Safety and Cost-effectiveness of Bridge-approach Guardrail for County State-aid (CSAH) Bridges in Minnesota by : Timothy J. Gates
Download or read book The Safety and Cost-effectiveness of Bridge-approach Guardrail for County State-aid (CSAH) Bridges in Minnesota written by Timothy J. Gates and published by . This book was released on 2005 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge-approach guardrail provides protection for vehicles from collision with bridge components, such as the blunt end of the bridge rail or abutment, and other types of run-off-the-road collisions. The primary objective of this research was to determine the average daily traffic (ADT) at which the benefit/cost ratio for the installation of approach guardrail at county-state-aid (CSAH) bridges in Minnesota becomes greater than 1.0. A survey of state transportation agencies found that 26 of 35 responding agencies have policies or guidelines requiring placement of approach guardrail on any bridge if the bridge was built using state funds. Results of the research analyses showed that bridge-approach guardrail was effective at reducing the severity of run-off-the-road crashes occurring on the approach or departure to CSAH bridges. Fatalities and A-injury crashes accounted for only 6 percent of the crashes occurring at bridges with approach guardrail compared to 28.5 percent at bridges without approach guardrail. The subsequent benefit/cost analysis showed that bridge-approach guardrail is cost-effective (i.e., B/C> 1) for CSAH bridges with ADT greater than or equal to 300 vehicles per day (vpd). Overall, approach guardrail has a benefit/cost ratio of approximately 3.5 to 5.5. The researchers recommended that the ADT threshold for approach guardrail on CSAH bridges be set at 400 vpd, which is consistent with previous Mn/DOT standards and AASHTO low-volume local road guidelines. Approach guardrail should be considered on a case-by-case basis for bridges with ADT between 150 and 400 vpd, especially those between 300 and 400 vpd. Placement of approach guardrail at bridges with ADT less than 150 vpd is not cost-effective in most cases.
Author :American Association of State Highway and Transportation Officials. Task Force for Roadside Safety Publisher :AASHTO ISBN 13 :1560515090 Total Pages :345 pages Book Rating :4.5/5 (65 download)
Book Synopsis Roadside Design Guide by : American Association of State Highway and Transportation Officials. Task Force for Roadside Safety
Download or read book Roadside Design Guide written by American Association of State Highway and Transportation Officials. Task Force for Roadside Safety and published by AASHTO. This book was released on 2011 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Roadside Design Guide presents a synthesis of current information and operating practices related to roadside safety and is written in dual units-metric and U.S. Customary. This book is a guide. It is not a standard, nor is it a design policy. It is intended to use as a resource document from which individual highway agencies can develop standards and policies. Although much of the material in the guide can be considered universal in its application, several recommendations are subjective in nature and may need modification to fit local conditions. However, it is important that significant deviations from the guide be based on operational experience and objective analysis. The 2011 edition of the AASHTO Roadside Design Guide has been updated to include hardware that has met the evaluation criteria contained in the National Cooperative Highway Research Program (NCHRP) Report 350: Recommended Procedures for the Safety Performance Evaluation of Highway Features and begins to detail the most current evaluation criteria contained under the Manual for Assessing Safety Hardware, 2009 (MASH). For the most part, roadside hardware tested and accepted under older guidelines that are no longer applicable has not been excluded in this edition." -- AASHTO website.
Book Synopsis Bridge Rail and Approach Railing for Low-volume Roads in Iowa by : Jake J. Bigelow
Download or read book Bridge Rail and Approach Railing for Low-volume Roads in Iowa written by Jake J. Bigelow and published by . This book was released on 2010 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Guidelines for bridge rail and approach guardrails can help improve the safety benefits of these devices while minimzing [i.e., minimizing] costs.
Book Synopsis Safety Beam Guardrail-bridge Approach Transitions by : Richard J. Ruby
Download or read book Safety Beam Guardrail-bridge Approach Transitions written by Richard J. Ruby and published by . This book was released on 1979 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Dynamic On-demand All-red Clearance Interval Extension Process for Stochastic Vehicular Arrivals at Signalized Intersections by : Timothy J. Gates
Download or read book A Dynamic On-demand All-red Clearance Interval Extension Process for Stochastic Vehicular Arrivals at Signalized Intersections written by Timothy J. Gates and published by . This book was released on 2007 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Improving Highway Safety at Bridges on Local Roads and Streets by :
Download or read book Improving Highway Safety at Bridges on Local Roads and Streets written by and published by . This book was released on 1998 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of Guardrail on Low-volume Roads According to Safety and Cost Effectiveness by : Margaret Joanna Rys
Download or read book Use of Guardrail on Low-volume Roads According to Safety and Cost Effectiveness written by Margaret Joanna Rys and published by . This book was released on 1999 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to develop guidelines for the use of guardrail on low-volume roads (LVR) in Kansas according to safety and cost effectiveness. A comprehensive review of the research literature was conducted to explore and gather information on the use of guardrail on LVR according to safety and cost effectiveness. The purpose of this information search was to identify the general elements used to determine the need for guardrail on LVR and to review any specific guidelines already in use by other states. The principle findings from this literature review are presented in this report.
Book Synopsis Use of Guardrail on Low-volume Roads According to Safety and Cost Effectiveness by : Margaret J. Rys
Download or read book Use of Guardrail on Low-volume Roads According to Safety and Cost Effectiveness written by Margaret J. Rys and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guardrails for Use on Historic Bridges by : Robert Frosch
Download or read book Guardrails for Use on Historic Bridges written by Robert Frosch and published by . This book was released on 2017-06-30 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridges that are designated historic present a special challenge to bridge engineers whenever rehabilitation work or improvements are made to the bridges. Federal and state laws protect historically significant bridges, and railings on these bridges can be subject to protection because of the role they play in aesthetics. Unfortunately, original railings on historic bridges do not typically meet current crash-test requirements and typically do not meet current standards for railing height and size of permitted openings. The primary objective of this study is to develop strategies that can be used to address existing railings on historic bridges and to develop solutions that meet current design requirements. In addition to the modification, selection, and design of the bridge railing, the bridge deck is also impacted by changes made to the railing. Due to increased force levels recently required by AASHTO, deck overhangs require significantly more reinforcement than for past practice. These increases are being realized on all bridge decks and may pose particular challenges for the attachment of railing to historic bridges. Therefore, a secondary objective of this project is to investigate the design of the deck overhang and determine whether reduced amounts of reinforcement are possible. For Volume 1 (Replacement Strategies), three phases of research were conducted. First, an overview of current practice for addressing historic bridge railings was performed. Second, an investigation was conducted to document historic bridge railings in Indiana. Finally, rehabilitation solutions were developed to address the specific bridge railings found in Indiana. Based on this research, three retrofit strategies were developed which include an inboard railing, curb railing, and a simulated historic railing. These rehabilitation solutions can be used to address historic bridge railings not only in Indiana, but across the country. For Volume 2 (Bridge Deck Overhang Design), experimental testing of half-scale and full-scale overhang specimens was conducted, and the results were analyzed. Failures of in-service bridge railings were also evaluated. Based on this research, recommendations are provided for the more efficient and economic design of bridge deck overhangs. These recommendations are applicable not only for historic bridges, but for all concrete bridge decks.
Book Synopsis Cost-effectiveness of Guardrail Improvements for Protecting Bridge Piers in Depressed Medians on Horizontal Curves by : Edward R. Post
Download or read book Cost-effectiveness of Guardrail Improvements for Protecting Bridge Piers in Depressed Medians on Horizontal Curves written by Edward R. Post and published by . This book was released on 1978 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Association of State Highway and Transportation Officials Publisher :Aashto ISBN 13 :9781560511663 Total Pages :0 pages Book Rating :4.5/5 (116 download)
Book Synopsis Guidelines for Geometric Design of Very Low-volume Local Roads (ADT [less Than Or Equal to Symbol] 400) by : American Association of State Highway and Transportation Officials
Download or read book Guidelines for Geometric Design of Very Low-volume Local Roads (ADT [less Than Or Equal to Symbol] 400) written by American Association of State Highway and Transportation Officials and published by Aashto. This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guardrail Evaluation for Hazards on Low-volume Rural Roads in Kansas by : Peng Wang
Download or read book Guardrail Evaluation for Hazards on Low-volume Rural Roads in Kansas written by Peng Wang and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Rural crashes, specifically roadside crashes, account for a disproportionately high number of fatal vehicle crashes in the United States. In 2017, the fatality ratios of rural crashes in Kansas was higher than the national average. Therefore, the Kansas Department of Transportation (KDOT) is continuously seeking to prevent and reduce rural roadside crashes. This research project was funded by KDOT to study the benefit-cost ratios of implementing guardrails to shield bridges, culverts, and embankments on low-volume rural roads in Kansas to reduce vehicle crash fatalities and decrease rural transportation expenditures. This study utilized RSAPv3 simulation because it implements previous crash statistics and could be readily updated with local data. With the help of KDOT staff, the research team synthesized traffic operation data and geometric features on rural roads in Kansas and carried out crash simulations using RSAPv3 to determine if the benefits of guardrail implementation exceeded the corresponding costs. The results were intended to help local engineers decide whether to implement guardrails in roadside locations with hazards. Meanwhile, the simulation also revealed significant contributing factors to rural roadside crashes. Survey results and simulation outcomes showed similar patterns. Based on project results, the benefit-cost ratios did not justify the implementation of new guardrails for bare culverts or bare embankments on rural roads in Kansas. However, W-beam guardrails were efficiently implemented on bridges with medium-hazard-level edges without attaching bridge-approach guardrails. Likewise, for bridges with TL-2 bridge rails, study results did not justify implementing bridge-approach guardrails.
Book Synopsis The Cost Effectiveness of Updating Guardrail Terminals to NCHRP 350 by : Douglas Robert Peterson
Download or read book The Cost Effectiveness of Updating Guardrail Terminals to NCHRP 350 written by Douglas Robert Peterson and published by . This book was released on 2001 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Association of State Highway and Transportation Officials Publisher :AASHTO ISBN 13 :1560514698 Total Pages :38 pages Book Rating :4.5/5 (65 download)
Book Synopsis LRFD Guide Specifications for the Design of Pedestrian Bridges by : American Association of State Highway and Transportation Officials
Download or read book LRFD Guide Specifications for the Design of Pedestrian Bridges written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 2009 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bridge Life-cycle Cost Analysis by : Hugh Hawk
Download or read book Bridge Life-cycle Cost Analysis written by Hugh Hawk and published by Transportation Research Board. This book was released on 2003 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accompanying CD-ROM contains software, Guidance manual, User manual, and appendixes to report.
Author :American Association of State Highway and Transportation Officials. Task Force for Roadside Safety Publisher : ISBN 13 : Total Pages :560 pages Book Rating :4.0/5 ( download)
Book Synopsis Roadside Design Guide by : American Association of State Highway and Transportation Officials. Task Force for Roadside Safety
Download or read book Roadside Design Guide written by American Association of State Highway and Transportation Officials. Task Force for Roadside Safety and published by . This book was released on 1989 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bridge Management Systems by : S. W. Hudson
Download or read book Bridge Management Systems written by S. W. Hudson and published by Transportation Research Board National Research. This book was released on 1987 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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