The death of an 82-year-old woman in a road crash on the A5 in Co Tyrone at the weekend brings to 58 the number of people killed on the road since 2006.
Bernadette Cranley from Lifford, Co Donegal, died following a two-vehicle collision outside Omagh at 12.30pm on Saturday.
The collision happened on the Mellon Road along the A5 near the Ulster American Folk Park between Omagh and Newtownstewart.
There have been plans to upgrade the road which links Derry with Aughnacloy in Co Tyrone since 2006.
A scheme to turn the road into a dual carriageway was first approved by the Executive in 2007, but it has been held up by legal challenges and uncertainty over funding.
Work was due to begin this year to upgrade the road to a dual carriageway along an 85km stretch.
Approval was given for the long-awaited upgrade in October 2024, but judicial review proceedings were brought against Stormont's Department for Infrastructure by nine applicants opposed to the project in November 2024.
The Irish Government has committed €600 million to the project.
After the then infrastructure minister in Stormont John O'Dowd gave the go-ahead for the £1.2bn upgrade last October, work was expected to commence early this year.
Kate Corrigan from Garvaghy, Co Tyrone, lost her son Nathan in a car crash on 27 December 2021.
Nathan Corrigan was killed four days before his 21st birthday on the A5 between Omagh and Aughnacloy, about 100m from his home.
Speaking to RTÉ News after the latest fatality, Ms Corrigan said "what we need now is a definitive timeframe for the works to start."
"We don't want any more delays," she added.
