Crash Investigation on Automobile vs. Crash Barrier: Assessment of W-Beam Guardrail with respect to REAM Standard

I. Abdul Hamid, S. T. M. Syed Tajul Arif, N. S. Mohd Zulkiffli, R. Sarani, M. S. Solah and M. R. Osman

Abstract: Road traffic crashes involving longitudinal traffic safety barriers, especially W-beam guardrails, are not uncommon. This shows the importance of the guardrails in performing its functions. In Malaysia, installation of the guardrails are according to a guideline published by REAM in 2006. However, the compliance of the barriers installation to the standards can be further verified to ensure its quality and integrity. Site survey on the barriers shows that compliance to the standards are high if it is installed and maintained under the concession, e.g. by PLUS Expressways Berhad. However, there are some issues concerning installation of barriers if it is under custodian of local authorities. The parameters used to measure the compliance, among others, are installation ground condition, overlapping, post height, post spacing, clear zone, guardrail conditions and sub-standards installation. It is suggested to the local authorities to give more emphasis on the inspection of existing barriers, as well as maintenance and replacement of barriers. This is because the barriers will not perform according to its function as it is intended under non-reliable conditions. The outcomes of this study will provide the road transport related agencies on the real conditions of W- beam guardrails installed on roads in Malaysia.

Keywords:Automotive crash investigation, traffic safety barrier, W-beam guardrail, barrier installation, REAM

References

Aqbal Hafeez A., Mohd Khairudin R., Mohd Syazwan S., Khairil Anwar A.K., & Wong S.V. (2012). Stability of high-deck buses in a rollover and contact-impact with traffic barriers (MRR 01/2012). Kuala Lumpur: Malaysian Institute of Road Safety Research.

Cortese, M., & Gazzaniga, M. (2015). Numerical approach to assess critical installation of vehicle restrain systems. Polytechnic University of Milan, Italy.

Ibitoye, A.B., Radin Umar R.S., Wong S.V., & Hamouda, A.M.S. (2004). Safety performance evaluation of W-beam guardrail along exclusive motorcycle lane. Paper presented at Malaysian Universities Transport Research Forum Conference (MUTRFC), Shah Alam, Malaysia.

Iskandar A.H., & Li, Q.M. (2013). Ageing Effect on crashworthiness of bus rollover. Paper presented at 9th European LS-DYNA Conference, Manchester, UK.

Marzougui, D., Mohan, P., Kan, C.D., & Opiela, K.S. (2007). Evaluation of rail height effects of the safety performance of W-beam barriers. Virginia: National Crash Analysis Center, The George Washington University.

Mohd Huzaifah M., Muhammad Marizwan A.M., Alvin Poi W.H., Ahmad Noor Syukri Z.A., Mohd. Hafzi M.I., Sharifah Allyana S.A.R., Iskandar A.H., & Wong S.V. (2010). Assessment of crash barriers and roadsides hazards along Malaysian Expressways. Kuala Lumpur: Malaysian Institute of Road Safety Research.

REAM (2006). Guidelines on design and selection of longitudinal traffic safety barrier. Shah Alam: Road Engineering Association of Malaysia.

Sicking, D.L., Mak, K.K., Rohde, J.R., & Reid, J.D. (2009). Manual for assessing safety hardware. Washington, DC: American Association of State Highway Transportation Officials.

Zainal Abidin, A.N.S., Abdul Rahim, M.M., Wong S.V., & Radin Sohadi, R.U. (2009). Single-vehicle accidents involving trees in Malaysia  A preliminary study (MRR 12/2009). Kuala Lumpur: Malaysian Institute of Road Safety Research.