Hard-pressed commuters could face long tail backs for several years as plans for the third lane along the N11/M11 are unveiled.
Anyone coming from Wicklow and Wexford are likely to be affected as junctions are closed along sections of the road between Loughlinstown Hospital and Ashford.
Traffic on the M11/N11 road has risen dramatically since the Glen o’ the Downs road was widened to a dual carriageway, going from 25,600 vehicles a day in 1999, to 53,000 last
Traffic volume grows to 78,000 when it is counted north of Bray, on the M11 just inside the Co Dublin border. Some 20,000 of these vehicles are from Co Wexford, about 14,000 of them recorded north of Gorey.
Wicklow County Council is set to start work on a parallel service road to the southbound lane of the N11 at Kilmacanogue, in a matter of weeks.
The 22-kilometre scheme is set to include a third lane on the M11/N11 stretching from the M50 merge southwards to south of the village of Kilmacanogue, a distance of about 10km.
While the public consultation is only proposing “options”, the options include the redesign of a number of junctions and closure of a range of smaller access roads from north of Bray to Coyne’s Cross.
Proposals for redesign include Fassaroe and Killarney Road, Kilmacanogue, Glenview and Delgany interchanges.
In addition, a number of access roads will be closed to improve traffic flow on the N11. Proposals for these include turns between the N11 and the Enniskerry Road, the Herbert Road access to Bray, as well as roads from the N11 to Willow Grove and Drummin and from the N11 northbound to Delgany at Barry’s Bridge.
Wicklow County Councillors have also asked design consultants Arup and the regional design office to consider how an express bus lane could be added.