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Title: TENNESSEE BRIDGE RAIL TO GUARDRAIL TRANSITION DESIGNS
Accession Number: 00677719
Record Type: Component
Availability: Find a library where document is available Abstract: Potential problems associated with the impact performance of guardrail to bridge rail transition designs currently used by the Tennessee Department of Transportation were identified through use of computer simulation. To alleviate these deficiencies, three alternative designs were developed for use as a retrofit to their existing transition installations and for new installations. In the first retrofit alternative, the first three 6-ft (1.83-m)-long W6 x 15 posts adjacent to the concrete parapet are replaced with 8-ft (2.44-m)-long W8 x 21 posts. The second design involves the addition of two 6-ft (1.83-m)-long W6 x 15 posts between the first three existing W6 x 15 posts to effectively reduce the post spacing to 1 ft 6.75 in. (0.48 m). The third retrofit design involves the addition of a lower C6 x 8.2 channel rub rail to the existing transition system. All three modified designs were crash tested and found to perform satisfactorily in accordance with the recommended guidelines presented in NCHRP Report 230. Since the impact performances of the three systems were essentially the same, the choice of which design to use as a retrofit in the field becomes a consideration of cost and site-specific requirements. Details of these three alternative transition designs and the results of the full-scale crash tests are presented.
Supplemental Notes: This paper appears in Transportation Research Record No. 1468, Recent Research on Roadside Safety Features. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Monograph Accession #: 01401260
Language: English
Authors: Mak, King KBligh, Roger PFalkenberg, PetePagination: p. 75-83
Publication Date: 1994
Serial: ISBN: 0309061024
Features: Figures
(4)
; Photos
(12)
; References
(9)
; Tables
(1)
TRT Terms: Identifier Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Bridges and other structures; Design; Highways; Research; Safety and Human Factors; I85: Safety Devices used in Transport Infrastructure
Files: TRIS, TRB
Created Date: May 19 1995 12:00AM
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