Several times I got stuck behind a slow-moving truck on a narrow road with a solid white line on my left, and I was clinching my fists with impatience.

在狭窄的公路上，我的车几次被缓缓行驶的货车挡在后面，左侧是一条的白色线，急得我攥紧了拳头。

youdao

They will be placed on the solid white bus lane line and are intended to deter motorists from cutting into the lane early or ignoring them completely.

BBC: Gateshead trials bus lane bollards