The safety benefit of wide centerline treatments utilizing audio-tactile line-marking on undivided highways

Whittaker, Adam and Somasundaraswaran, Kathirgamalingam (2013) The safety benefit of wide centerline treatments utilizing audio-tactile line-marking on undivided highways. In: 14th Road Engineering Association of Asia and Australasia Conference (REAAA 2013): The Road Factor in Economic Transformation , 26-28 Mar 2013, Kuala Lumpur, Malaysia.


Major highways in Australia cover large distances through rural areas. They are typically undivided, have high operating speeds and carry high traffic volumes. Head-on and crossover-the-centreline crashes are of the most severe crash types that occur on these roads. They are disproportionally represented in crashes resulting in fatalities, yet conventional road design provides no separation between opposing traffic lanes. The Bruce Highway in Queensland, Australia has consistently rated as one of Australia's worst performing roads and is considered a 'killer highway' by the wider community, thus the road authority trialled a Wide Centreline Treatment (WCLT) utilising Audio-Tactile Line-Marking (ATLM). This innovative road safety treatment aims to reduce the incidence of cross centreline crashes by increasing separation between opposing vehicles and providing auditory and vibratory warning to drivers that have strayed from their lane. This paper quantifies the safety benefit following installation of a WCLT on a 56 km segment of the Bruce Highway. An Empirical Bayes analysis was used to account for the regression to the mean bias due to the short period of before and after data available and the higher than normal crash history experienced at the site. Results revealed a significant reduction for all crash types analysed. Importantly head-on crashes were reduced by 75% and both run-off-road-left and total crashes were each reduced by 59%. Further, it shows that the WCLT provides a cost effective safety benefit from its low cost of installation and maintenance. These preliminary yet encouraging results lay the foundation for future consideration and implementation of WCLT's as a road safety initiative for rural highways.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 06 Jun 2014 02:53
Last Modified: 16 Sep 2014 01:07
Uncontrolled Keywords: rural highway; road safety; audio-tactile line-marking; wide centreline treatment
Fields of Research : 12 Built Environment and Design > 1204 Engineering Design > 120402 Engineering Design Knowledge
09 Engineering > 0905 Civil Engineering > 090507 Transport Engineering
09 Engineering > 0915 Interdisciplinary Engineering > 091507 Risk Engineering (excl. Earthquake Engineering)
Socio-Economic Objective: B Economic Development > 88 Transport > 8801 Ground Transport > 880109 Road Safety

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