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NCHRP Report 350 Test 3-21 of the Vertical Flared Back Transition

Publication Number: FHWA-RD-99-062
Date: December 1998

NCHRP Report 350 Test 3-21 of the Vertical Flared Back Transition

FOREWORD

This report will be of interest to researchers and those State and local highway officials who select, locate, and design traffic barriers. It documents the results of a crash test of a transition from a W-beam guardrail to a vertical flared back concrete end section. The test was conducted with a 2000-kg pickup truck impacting the critical point of the transition at a nominal speed and angle of 100 km/h and 25 degrees. Damage to the transition section was moderate. However, the pickup truck rolled over after impact. It was found that the test results did not meet all of the required criteria for test no. 3-21 in NCHRP Report 350.

Michael F. Trentacoste
Director, Office of Safety Research and Development

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TECHNICAL REPORT DOCUMENTATION PAGE

1. Report No.

FHWA–RD–99–062

2. Government Accession No.

3. Recipient's Catalog No.

4. Title and Subtitle

NCHRP Report 350 Test 3–21 of the Vertical Flared Back Transition

5. Report Date

6. Performing Organization Code

7. Author(s)

C. Eugene Buth, Wanda L. Menges and Barbara G. Butler

8. Performing Organization Report No.

404211–4

9. Performing Organization Name and Address

Texas Transportation Institute
The Texas A&M University System
College Station, Texas 77843–3135

10. Work Unit No. (TRAIS)

11. Contract or Grant No.

DTFH61–97–C–00039

12. Sponsoring Agency Name and Address

Office of Safety and Traffic
Operations Research and
Development
Federal Highway Administration
6300 Georgetown Pike
McLean, Virginia 22101–2296

13. Type of Report and Period Covered

Test Report
July 1997 – September 1998

14. Sponsoring Agency Code

15. Supplementary Notes

Research performed in cooperation with the Federal Highway Administration.
Research Study Title: Assessment of Existing Roadside Safety Hardware – II
Contracting Officer's Technical Representative (COTR): Charles F. McDevitt – HSR–20

16. Abstract

Few transitions have been tested to NCHRP Report 350 standards. Officials at FHWA decided that the W–Beam with W–Beam Rub Rail and Steel Posts Transition to the Vertical Flared Back Concrete Bridge Rail should be tested to test level three (TL–3). The test performed (test designation 3–21) involves the 2000P (pickup truck) traveling at a nominal speed and angle of 100 km/h and 25 degrees impacting the critical impact point. This test is intended to evaluate the strength of the section in containing and redirecting the pickup truck.

This report presents the details and results of NCHRP Report 350 test destination 3–21 for evaluation of the W–Beam with W–Beam Rub Rail and Steel Posts Transition to the Vertical Flared Back Concrete Bridge Rail to TL–3. The W–Beam with W–Beam Rub Rail and Steel Posts Transition to the Vertical Flared Back Concrete Bridge Rail did not meet required criteria K and F of NCHRP Report 350 test designation 3–21.

17. Key Words

Bridge rail, transition, crash testing, roadside safety.

18. Distribution Statement

No restrictions. This document is available to the public through the National Technical Information Service, 5285 Port Royal Road, Springfield, VA 22161.

19. Security Classification (of this report)

Unclassified

20. Security Classification (of this page)

Unclassified

21. No. of Pages

22. Price

Form DOT F 1700.7 (8-72) Reproduction of completed page authorized

FHWA-RD-99-062

Page Owner: Office of Research, Development, and Technology, Office of Safety, RDT

Keywords: Bridge rail, transition, crash testing, roadside safety.
TRT Terms: Guardrails, Bridge railings, Impact tests
Scheduled Update: Archive - No Update needed

This page last modified on 03/08/2016