A racetrack venue designated especially for the sport of auto racing.
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
a track marked with several lanes, which is used for competitive running events.
A line on which trains can run, as opposed to a siding.