A 2+2 road is a type of dual-carriageway highway. It provides two lanes in each direction. A wire rope barrier separates the oncoming traffic. Unlike standard freeways, 2+2 roads often use roundabouts or flat junctions instead of exit ramps. This makes them cheaper to build while still preventing head-on collisions. They are popular on medium-traffic rural routes.
Mechanic Glossary
2+2 Road
A four-lane road design featuring two lanes in each direction, separated by a central cable barrier or narrow median, without grade-separated junctions.
Frequently Asked Questions
A four-lane road (two lanes in each direction) separated by a central steel cable safety barrier.
Freeways have exit ramps and overpasses. 2+2 roads have roundabouts or standard intersections, which makes them cheaper to construct.
The wire rope catches out-of-control vehicles and stops them from crossing into oncoming lanes.