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The M1 motorway ((アイルランド語:Mótarbhealach M1)) is a motorway in Ireland. It forms the large majority of the N1 national primary road connecting Dublin towards Belfast along the east of the island of Ireland. The route heads north via Swords, Drogheda and Dundalk to the Northern Irish border just south of Newry in County Armagh, where it joins the A1 road and further on, the M1 motorway in Northern Ireland. It also forms a significant part of the road connection between Dublin and the Northern Irish cities of Newry, and Lisburn. The route is part of European route E01. ==Route== Almost the entire length of the N1 has been upgraded to motorway standard and is designated the M1 motorway. It runs from the Junction 3 of the M50 ring road in Dublin, past Swords, Balbriggan Drogheda and Dundalk before ending at Ballymascanlon north of Dundalk, bypassing the intermediate towns through which the original route travelled.〔http://www.irishstatutebook.ie/2012/en/si/0053.html S.I. No. 53/2012 — Roads Act 1993 (Classification of National Roads) Order 2012〕 The original N1 route now forms the R132.〔http://www.irishstatutebook.ie/2012/en/si/0054.html S.I. No. 54/2012 — Roads Act 1993 (Classification of Regional Roads) Order 2012〕 At Ballymascanlon, it becomes the N1 dual carriageway and continues to the Northern Irish border. The motorway section of the N1 uses the M1 designation. Small yellow route markers along the motorway route also read N1. The motorway was built in several stages as short disconnected bypasses, replacing the original N1 route. The first section opened (in 1983) was from Whitehall to Coolock Lane followed (in 1985) by the ''Airport Motorway'' between Whitehall and Dublin Airport, only the third section of motorway opened in Ireland. 1980s style direction signs were still intact on this route up until 2006. Part of this original M1 is now a spur to Dublin Airport, while another part between Whitehall to the Port Tunnel portals is now narrowed to two+one lanes (although still grade separated) as a result of the Dublin Port Tunnel work. There are toll fees for use of the motorway between junctions 7 and 10, the section which forms the Drogheda bypass. Work began in 2004 on a bypass of Dundalk, and was completed three months ahead of schedule in 2005, extending the motorway to just south of the border. Construction finished in 2007 on a cross-border stretch of grade-separated dual-carriageway linking the northern end of the M1 with the A1 near Newry in County Armagh. This was opened to traffic on 2 August 2007. Its length is 14 km, 4.6 km north of the border and 9.4 km south of the border. This allows traffic to flow freely from Dublin Port on motorway/dual-carriageway standard road to the Hillsborough Roundabout, located south of Lisburn. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「M1 motorway (Republic of Ireland)」の詳細全文を読む スポンサード リンク
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