高こう速そく車しゃ線せん

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Meanings

1

noun

high-speed lane; fast lane

Refers to a lane on a highway or expressway designated for faster traffic, often the passing lane.

高tall, high, expensive

速quick, fast

線line, track

追おい越こし車しゃ線せん
追越車線 specifically means 'overtaking lane' or 'passing lane', while 高速車線 is a more general term for a lane where vehicles travel at higher speeds.
走そう行こう車しゃ線せん
走行車線 is the 'driving lane' or 'travel lane', typically the lane for normal cruising speed, as opposed to the faster 高速車線.

Compound of 高速 (high-speed) and 車線 (traffic lane).