motorway

Short definition from Wiktionary

Noun

1. 1
   A highway with grade-separated crossings (rather than level crossings) and designed (and only permitted) for high-speed motor-traffic (in Europe motor vehicles with a higher speed limit than 40 km/h) running in two directions on one separate carriageway each.
2. 2
   A racetrack venue designated especially for the sport of auto racing.