superhighway
noun /ˌsuːpəˈhaɪweɪ/
/ˌsuːpərˈhaɪweɪ/
(North American English, old-fashioned)- an interstate (= in the US, a wide road, with at least two lanes in each direction, where traffic can travel fast for long distances across many states. You can only enter and leave the road at special ramps.)
高速公路：州际公路（在美国，=一条宽阔的道路，在每个方向上至少有两条车道，在许多州，交通可以快速长距离行驶。您只能在特殊的匝道上进出道路。）