A super two, super two-lane highway or wide two-lane is a two-lane surface road built to highway standards with wide lanes and other safety features normally present on a freeway with more lanes, typically including partial control of access, occasional passing lanes and hard

shoulder The human shoulder is made up of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone) as well as associated muscles, ligaments and tendons. The articulations between the bones of the shoulder m ...

s. It is often built for eventual conversion to

freeway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms ...

or at least

divided-highway A dual carriageway ( BE) or divided highway ( AE) is a class of highway with carriageways for traffic travelling in opposite directions separated by a central reservation (BrE) or median (AmE). Roads with two or more carriageways which are ...

status once traffic volumes rise. Super twos have also been employed because of environmental concerns, such as where

Interstate 93 Interstate 93 (I-93) is an Interstate Highway in the New England states of Massachusetts, New Hampshire, and Vermont in the United States. Spanning approximately along a north–south axis, it is one of three primary Interstate Highways ...

becomes a super two in Franconia Notch, New Hampshire, United States.

Ireland

In the

Republic of Ireland Ireland ( ga, Éire ), also known as the Republic of Ireland (), is a country in north-western Europe consisting of 26 of the 32 Counties of Ireland, counties of the island of Ireland. The capital and largest city is Dublin, on the eastern ...

, the term ''wide two-lane'' is used by the

National Roads Authority The National Roads Authority (NRA) ( ga, An tÚdarás um Bóithre Náisiúnta) was a state body in Ireland, responsible for the national road network. The NRA was established as part of the Roads Act 1993 and commenced operations on 23 December ...

. In policy documents, the designation WS2 is used, which is also used in the UK for a wide single carriageway. Wide two-lane roads are c