2+2 road
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A 2+2 road is a specific type of dual-carriageway that exists primarily in Ireland,[1] Sweden,[2] Estonia, and Finland,[3] consisting of two lanes in each direction separated by a steel cable barrier.
These roads do not have hard shoulders and therefore cannot be designated as motorways in the future. However, they may be designated as limited-access roads, as such roads do not require the physical standard of motorways to be designated as expressways. The Irish variant has 3.5-meter-wide (11 ft) lanes[4] where there are a number of Swedish variants some with 3.25-meter-wide (10.7 ft) lanes.
Junctions are generally at-grade roundabouts and minor roads cross under or over the mainline without connecting. They are also known as "type 2 dual-carriageways" by the Irish National Roads Authority. These roads look similar to expressways, except that expressways often have interchanges, large medians or concrete barriers between traffic.
History
First Irish 2+2
In Ireland first purpose-built road of this type opened in December 2007[5][6] as a new greenfield section of the N4 national primary route which joins Dublin to Sligo.
See also
- Swedish 2+2 Types (In Swedish)
- 2+1 road
- Limited-access road
References
- ^ Google (May 31, 2021). "2+2 road in Ireland" (Map). Google Maps. Google. Retrieved May 31, 2021.
- ^ Google (May 31, 2021). "2+2 road in Sweden" (Map). Google Maps. Google. Retrieved May 31, 2021.
- ^ Google (May 31, 2021). "2+2 road in Finland" (Map). Google Maps. Google. Retrieved May 31, 2021.
- ^ "Irish Design Standard (pdf)". Archived from the original on March 3, 2016. Retrieved July 28, 2013.
- ^ "N4 Drumsna Longford (Dromod Roosky)".[permanent dead link]
- ^ "Ireland's First 2+2 Road Type Opens in Dromod Roosky". Archived from the original on 26 July 2009.