Freeway lane change signal｜高速变道提前打灯

原创练习题 / Practice question

How far in advance should you signal a freeway lane change, in time?

高速公路变道前应至少提前多久打信号？

1. At least one second / 1秒
2. At least two seconds / 2秒
3. At least five seconds / 5秒
4. At least ten seconds / 10秒

答案与解析 / Answer and explanation

At least five seconds. Signal at least five seconds before changing freeway lanes, then check traffic and confirm there is room.

5秒。高速公路变道应至少提前5秒示意，随后仍须观察并确认安全。