Antonyms of adj three-lane

1 sense of three-lane

Sense 1
three-lane -- (having a lane for traffic in each direction and a center lane for passing)

INDIRECT (VIA multilane) -> single-lane -- ((of roads) having a single lane for traffic in both directions; when vehicles meet one must pull off the road to let the other pass)

Similarity of adj three-lane

1 sense of three-lane

Sense 1
three-lane -- (having a lane for traffic in each direction and a center lane for passing)
       => multilane (vs. single-lane) -- ((of roads and highways) having two or more lanes for traffic)