Upgrades
The N11 has been gradually upgraded from single to dual carriageway standard from the 1950s to the present, with improvements taking place at an accelerated pace in recent years. The first short stretch of dual carriageway on the road, and indeed the first stretch of dual carriageway anywhere in Ireland (the republic), was built in the 1950s between the Stillorgan Road/Newtownpark Avenue junction and Foxrock Church (this stretch was substantially widened around the turn of the millennium). Subsequent short stretches of dual carriageway, at Loughlinstown, between Bray and Kilpedder, and from Donnybrook to Stillorgan were constructed during the early to mid 1970s, this phase ending with the opening of the Stillorgan bypass in October 1979. Since that time, these sections have been joined up through further improvements.
Read more about this topic: N11 Road (Ireland)