speedway
/ˈspiːdweɪ/noun
mass noun
1- a form of motorcycle racing in which the riders race several laps around an oval dirt track, typically in a stadium（尤指在体育场中举行的）摩托车赛。
1.1
- count noun a stadium or track used for this sport摩托赛车场（或赛车道）。
1.2
- N. Amer. a road or track used for motor-car racing〈北美〉赛车路段（或赛车道）。
1.3
- N. Amer. a highway for fast motor traffic〈北美〉高速公路。