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ISBN 13 :
Total Pages : 888 pages
Book Rating : 4.:/5 (891 download)
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1998 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 502 pages
Book Rating : 4.3/5 (555 download)
Download or read book Transportation Research Record written by and published by . This book was released on 1994 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 110 pages
Book Rating : 4.X/5 (2 download)
Download or read book Recent Research on Roadside Safety Features written by and published by . This book was released on 1994 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Malcolm H. Ray
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ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 (17 download)
Download or read book Guidelines for Shielding Bridge Piers written by Malcolm H. Ray and published by . This book was released on 2018 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : American Association of State Highway and Transportation Officials. Task Force for Roadside Safety
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ISBN 13 :
Total Pages : 560 pages
Book Rating : 4.0/5 ( download)
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:
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ISBN 13 : 9780309077217
Total Pages : 96 pages
Book Rating : 4.0/5 (772 download)
Download or read book Geometric Design and the Effects on Traffic Operations, 2002 written by and published by . This book was released on 2002 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Federal Highway Administration
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ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.:/5 (3 download)
Download or read book Roadside Safety Design written by United States. Federal Highway Administration and published by . This book was released on 1975 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: This roadside safety design package has been developed to satisfy a need for training in this area. It is hoped that all persons involved in the design, construction, operation, and maintenance of highways will become familiar with the concepts contained in the program. The concepts and practices discussed come from those contained in the AASHTO publication, "Highway Design and Operational Practices Related to Highway Safety". They are discussed in considerable depth in this program and should provide a good working knowledge of roadside safety design. Much of the program is oriented around freeways; however, the principles apply equally toward the lower order highway.
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ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 ( download)
Download or read book Intelligent Transportation Systems and Vehicle-highway Automation, 2002 written by and published by . This book was released on 2002 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Roger P. Bligh
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ISBN 13 :
Total Pages : 200 pages
Book Rating : 4.:/5 (1 download)
Download or read book Evaluation of Bridge Approach Rails written by Roger P. Bligh and published by . This book was released on 1992 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: A recent study on the performance of guardrail-to-bridge rail transitions revealed that many widely used designs do not meet current safety standards. As a result, the Federal Highway Administration (FHWA) requested that the Arizona Department of Transportation verify the safety performance of its standard transition designs. Three transition designs currently being used by ADOT were evaluated through a combined program of computer simulation and full-scale crash testing. The standard ADOT wood post transition, incorporating a channel rubrail and two different sizes of timber posts at a reduced post spacing near the bridge rail end, was found to be in compliance with National Cooperative Highway Research Program (NCHRP) Report 230 performance criteria. The standard ADOT steel post transition with channel rubrail was also found to be in compliance with NCHRP Report 230 requirements when impacted near the end of the bridge rail. However, the upstream end of the steel post transition required modification to eliminate deficiencies identified during testing. The modified design, which terminated the channel rubrail behind a W6x9 guardrail post, was successfully crash tested. A recent study on the performance of guardrail-to-bridge rail transitions revealed that many widely used designs do not meet current safety standards. As a result, the Federal Highway Administration (FHWA) requested that the Arizona Department of Transportation verify the safety performance of its standard transition designs. Three transition designs currently being used by ADOT were evaluated through a combined program of computer simulation and full-scale crash testing. The standard ADOT wood post transition, incorporating a channel rubrail and two different sizes of timber posts at a reduced post spacing near the bridge rail end, was found to be in compliance with National Cooperative Highway Research Program (NCHRP) Report 230 performance criteria. The standard ADOT steel post transition with channel rubrail was also found to be in compliance with NCHRP Report 230 requirements when impacted near the end of the bridge rail. However, the upstream end of the steel post transition required modification to eliminate deficiencies identified during testing. The modified design, which terminated the channel rubrail behind a W6x9 guardrail post, was successfully crash tested.
Author : John Russell Jewell
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.:/5 (318 download)
Download or read book Vehicular Crash Tests of the California ST-20 Bridge Rail written by John Russell Jewell and published by . This book was released on 2004 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the course of this project a see-through steel bridge rail (Type California ST-20) was developed and tested. The ST-20, as tested, is at the limits of meeting the NCHRP Report 3501 TL-4 test matrix. The bridge rail also met the requirements established in the AASHTO Bridge Design Specifications for use as a bicycle rail and is considered an aesthetically pleasing see-through bridge rail. The barrier, as tested, uses steel posts at 3-m spacing to support four boxbeam rails and one additional handrail to meet the height requirements for bicycles. Because the ST-20 is based on a TL-4 bridge rail from Wyoming DOT3,4, only Test 4-11 (NCHRP Report 350) was considered necessary.
Author : Scott K. Rosenbaugh
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ISBN 13 :
Total Pages : 125 pages
Book Rating : 4.:/5 (125 download)
Download or read book Development and Testing of an Optimized MASH TL-4 Concrete Bridge Rail written by Scott K. Rosenbaugh and published by . This book was released on 2021 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new concrete bridge rail was developed and optimized using recently updated Manual for Assessing Safety Hardware (MASH) Test-Level 4 (TL-4) design loads. The rail was optimized to maximize vehicle stability, minimize installation costs, and mitigate the potential for deck damage by minimizing loads transferred to the deck. Additionally, the bridge rail was designed with a 39-in. installation height so that it would remain crashworthy after future roadway overlays up to 3 in. thick. The barrier had a front face with a 3-degree slope (i.e., batter) away from vertical to promote vehicle stability during impacts while also providing some slope to allow for slipforming real-world installations. Yield-line theory was utilized to design both interior and end regions of the barrier. Further, minimum deck strengths were determined and a deck overhang design procedure was provided for users desiring to modify their existing deck details. Finally, MASH test designation no. 4-12 was conducted on the new bridge rail to evaluate its safety performance as well as the potential for damage to the barrier and bridge deck. In test no. 4CBR-1, the 22,198-lb single-unit truck impacted the concrete bridge rail at a speed of 57.6 mph and an angle of 16 degrees. The single-unit truck was successfully contained and redirected, and all safety performance criteria were within acceptable limits as defined in MASH. Therefore, test no. 4CBR-1 was determined to be acceptable according to MASH test designation no. 4-12. Conclusions and recommendations for implementation were provided.
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ISBN 13 :
Total Pages : 172 pages
Book Rating : 4.:/5 (1 download)
Download or read book Two Approach Guardrail Transitions for Concrete Safety Shape Barriers written by and published by . This book was released on 1998 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two approach guardrail transitions for use with concrete safety shape barriers were developed and crash tested. For this study, the transition systems were attached to the New Jersey safety shape concrete barrier; however, it is believed that these transition systems could be easily adapted to the F-shape barrier with no need for further crash testing. Both transition designs were constructed with two nested thrie beam rails measuring 2.66-mm thick. The first transition design was supported by nine W150x13.5 steel posts measuring, 1,981-mm long, while the second transition design was supported by nine 152-mm x 203-mm wood posts measuring 2,134-mm long. For both systems, post spacings consisted on one at 292 mm, five at 476 mm, and three at 952 mm. A triangular-shape concrete curb was constructed below the thrie beam rail on each approach guardrail transition system. The two transition systems successfully met the Test Level 3 requirements specified in NCHRP Report 350, "Recommended Procedures for the Safety Performance Evaluation of Highway Features."
