Road refers to the passage, road or road on land that has been laid or otherwise improved between two places to allow walking or some form of transportation (including motor vehicles, trolleys, bicycles or horses).

A road consists of one or two roads (British: carriageway), each with one or more lanes and any associated sidewalks (British: sidewalk) and road edges.

Roads available to the public can be called major roads, boulevards, highways, interstates, highways or major, minor, and tertiary local roads.

The theme of road design is considered to be part of highway engineering. Structural road design is the science of designing roads for the environment to extend their service life and reduce maintenance. Shell pavement design method is used to design new asphalt roadside in many countries.