What does a 2-plus-1 road configuration include?

A 2-plus-1 road configuration consists of two non-motorway lanes designated for vehicles traveling in one direction, while there is one non-motorway lane allocated for traffic in the opposite direction. This design allows for improved traffic flow and safety on roads that are not classified as motorways.

The two lanes in one direction provide additional capacity for vehicles, which is beneficial, particularly in heavy traffic conditions. Meanwhile, the single lane in the opposite direction helps manage oncoming traffic while still maintaining overall connectivity. This structure is effective in balancing the needs of both directions while helping to minimize head-on collisions.

In contrast, the other options do not accurately reflect the characteristics of a 2-plus-1 road. Thus, choosing the definition in the first option aligns with the established understanding of this road configuration.