汽车站(qì chē zhàn) - bus stop, bus station, coach station in Mandarin

汽车站 (qìchēzhàn) covers both a roadside bus stop and a proper bus or coach station building, so context decides which one is meant. 汽车 (qìchē) is "car, motor vehicle" but is used loosely for buses and coaches too, and 站 (zhàn) means "stop, station", the same character in 火车站 (huǒchēzhàn), "train station".

If a scenario needs the specific sense of "long-distance coach station", 长途汽车站 (chángtú qìchēzhàn) removes any ambiguity, and 公交车站 (gōngjiāo chēzhàn) is the tighter word for a city bus stop specifically. For everyday speech, though, plain 汽车站 does most of the work.

在汽车站等 (zài qìchēzhàn děng), "wait at the bus stop", and 汽车站坐车 (qìchēzhàn zuò chē), "catch a bus at the bus station", are the two phrasings worth having ready.