page_title: N31 road (Ireland)
section_title: Route
hierarchical_section_title: N31 road (Ireland) / Route
caption_attribution_description: English: N31 Blackrock By-Pass.
context_page_description: 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 and Dublin's M50 C-ring motorway connect to the N31.
context_section_description: 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.
caption: N31 Blackrock By-Pass
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