From Middle English *rodeway, *radewey (attested in radewey-stile (literally “roadway-stile”)), equivalent to road + way; road had the early sense of "riding" when the compound was formed, thus originally "a way for riding on".
roadway (plural roadways)
- A way used as a road.
- The main or central portion of a road, used by the vehicles.
- The portion of a bridge or railway used by traffic.
main or central portion of a road used by the vehicles
portion of bridge/railway used by traffic