单选题 · 选择一个答案
Where two traffic streams merge and no lane markings decide priority, what is the recommended zipper-merging practice?
两股车流汇合，且没有车道线决定让行次序时，建议怎样拉链汇流？
Where no lane markings determine priority, merge alternately like a zip, letting one vehicle in.
没有车道线决定让行次序的汇流处，按拉链原则交替让一辆车汇入。
阅读相关知识
Marked lane changes and give-way controls retain their own rules. Zipper merging does not justify forcing a gap or require a fixed 40 km/h speed.
已明确标线的变道或让行位置仍须按其规则处理。拉链汇流不代表强行挤入或固定必须把车速降到40公里。