N31 road (Ireland)
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| Route information | |
| Length: | 7.11 km (4.42 mi) |
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| Primary destinations: |
(bypassed routes in italics)
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| Road network | |
(bypassed routes in italics)
The N31 road is a national primary road in Ireland. It connects the harbour at Dún Laoghaire southeast of Dublin to the national route network. Both the N11 (Dublin – Wexford) and Dublin's M50 C-ring motorway connect to the N31.
With the completion of the Southeastern Motorway section of the M50 in 2005, the N31 was extended to connect to it. Since 2006, the N31 begins at J14 on the M50. Leopardstown Road and Brewery Road bring the N31 northeast to join the N11 Stillorgan Road southeast of Stillorgan.
The route diverges from the N11 again further north as Mount Merrion Avenue, bringing the N31 east to the sea front. From here, the N31 passes through Blackrock via Frescati Road/Blackrock By Pass; (see thumbnail) alongside Monkstown via Temple Road, Newtown Avenue and Seapoint Avenue; and to Dún Laoghaire via Dunleary Road and Crofton Road.
The route was revised in 2005 to include a new section between the M50 and N11. No further planned amendments to the route have been publicised as of 2015, but the N31 would be affected in the event of an Eastern Bypass of Dublin. The current M50 would connect at the southern end of this via a link on a similar alignment to the first half of the current N31.
A major upgrade of the Blackrock By-pass commenced on 18 August 2014 from its junction with Mount Merrion Avenue to Stradbrook Road which was completed on 31 August 2015. It was undertaken by Dún Laoghaire-Rathdown County Council.
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