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The N21 road is a national primary road in Ireland. The route runs from the M20 outside Limerick to Tralee with connecting roads to other parts of County Kerry. It is in length. It runs through the towns of Abbeyfeale, Newcastlewest, Adare and the village of Templeglantine. Prior to October 2010 the N21 also ran through the town of Castleisland. The town has recently been bypassed. ==Details== The N21 route commences about southwest of Limerick city, just beyond Patrickswell. At the junction, which is reached by the main M20 motorway, the N20 diverges south to Cork and the main dual-carriageway becomes the N21 west. Prior to the 2001 opening the new dual-carriageway, traffic to Kerry left the city on the old N20 in a southwest direction on the Ballinacurra Road through Raheen and then went through Patrickswell to the beginning of the N21. The new M20/N21 dual-carriageway route begins at junction 1 on the Rosbrien Interchange as the M20 where it leaves the M7/N18 Limerick Southern Ring Road, and bypasses the Limerick suburbs of Dooradoyle, Raheen and Patrickswell, and continues, as the N21, almost to Adare. At this point the N21 becomes a standard two-lane road and flows through the main street of the scenic village. The N21 then runs by Croagh and Rathkeale, which were both bypassed in 1990, before entering Newcastle West and filtering through the town. Further along the route the N21 passes through Templeglantine, before going through the major town of Abbeyfeale. The road continues southwest, at the townland of Kilkinlea it crosses over the River Feale into County Kerry passing by Knocknagoshel and heading towards Castleisland. A new roadway from Abbeyfeale to Knocknagoshel, bypassing the accident-prone ''Headleys bridge'' near Knocknagoshel opened in July 2006. The remainder of the road to Castleisland was realigned in the 1980s. A section north of Casleisland was overlaid and brought up to standard in 1999. At Castleisland, the N21 heads west to Tralee. The short N23 continues southwest to Farranfore, allowing traffic to continue south along the N22 to Killarney. A new road from Castleisland to Ballycarty near Tralee was opened in early 2001. This was followed by a new section into Tralee, opened in April 2005. The N21 terminates at Camp Roundabout on the N22/N69 Tralee Bypass which opened in August 2013. 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「N21 road (Ireland)」の詳細全文を読む スポンサード リンク
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