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Last edited 15 Dec 2021
Improving the Safety of Single Carriageways in Northern Ireland
The single biggest cause of road deaths in Northern Ireland is excessive speed on rural single carriageway roads. However, the risk of collisions on rural roads can be significantly altered through road safety engineering measures. This study examines road traffic collisions on single carriageways, exploring the performance of wide single 2+1 (WS2+1) carriageways as an effective road safety engineering solution to Northern Ireland’s single carriageway network.
An in-depth critical analysis of authoritative literature provided contextualisation for this study. Quantitative analyses of bespoke secondary data sets were conducted which found that 90% of fatal collisions occurred on single carriageways. WS2+1 carriageways were the best performing scheme type with a 67% reduction in collision severity. WS2+1 carriageway configurations are a beneficial, cost effective engineering solution that reduces driver frustration and collisions on single carriageways.
The judges said, “A superbly presented and well-written dissertation that addresses a topical issue and mobilises rigorous statistical analysis with full use of available secondary data. The literature review is exemplary. It draws from current literature and weaves together a compelling argument. It is an excellent piece of work that could easily be used for policy development and infrastructure investment in improving road safety in Northern Ireland and globally.”
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