The term LINE ON A STREET MAP can be solved by the crossword solution ROAD, which is a four letter word. A ROAD is a type of thoroughfare, route, or way on land between two places that has been paved or otherwise improved to allow travel by foot or some form of conveyance, including a motor vehicle, cart, bicycle, or horse. Roads consist of one or two roadways (British English: carriageways), each with one or more lanes and any associated sidewalks (British English: pavement) and ROAD verges.