In 2005 the Republic of Ireland’s National Roads Authority and Roads Service Northern Ireland jointly applied the EuroRAP Risk Mapping methodology to motorways and major highways. Crash and traffic data for the five year period 1998-2002 inclusive was collated and assessed.
In the Republic of Ireland, the National Road Network spanned 5,400km and comprised 93% of single carriageways, 4% dual and 3% motorway. This represented around 6% of the entire road network and accounted for 47% of all travel. Just under half of all road deaths occurred on this network.
In Northern Ireland analysis covered main regional inter-urban routes, approximately 2,200km in length. 89% of this network was single carriageway, 6% dual and 5% motorway. This represented about 9% of the entire road network, accounted for around 60% of all travel, and half of all road deaths.
Results showed that the fatal collision rate of an average rural single carriageway was twice that of a dual and 6 times that of a motorway.
In the Republic sections of road with higher than average risk were distributed throughout the network, with 10% rated as medium-high risk and 2% rated as high risk.
In Northern Ireland 19% of the network was rated medium-high risk. No sections fell into the high risk banding.
Updated results were published in 2008, covering the data period 2002 to 2006. This showed that all high risk sections had been eliminated. Out of the 125 sections assessed in Northern Ireland, 112 had improved or remained within the same risk band.