Guardrail and guardrail terminals are frequently installed over curbs. However, in recent years, the safety performance of these systems has been a concern for researchers and designers. The evaluation of the myriad of potential effects of curbs adjacent to longitudinal barriers is a significant undertaking. Therefore, the objective of this research study was to study the effects of curb placement adjacent to a W-beam longitudinal barrier when impacted by a 3/4-ton pickup truck. A guardrail/curb combination was evaluated according to the Test Level 3 (TL-3) safety performance criteria provided in NCHRP Report No. 350. In an effort to reduce the scope of the research study, one standard-size curb geometry was selected for testing. For the research study, the member states of the pooled fund program chose an 102-mm high by 203-mm wide triangular shape, mountable curb. An 102 mm rather than a 152-mm high curb was selected; since, it offered an increased potential for meeting the safety standards while also providing an acceptable level of hydraulic capacity.
Guardrail And Guardrail Terminals Installed Over Curbs. Phase II
2001
76 pages
Report
No indication
English
Guardrail and Guardrail Terminals Installed over Curbs
NTIS | 2000
|Facts about Guardrail End Terminals
British Library Online Contents | 1996