High beam is not allowed on 2 lane highway.

来源: 于 2012-01-17 15:01:47 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

However, people may forget to switch to low beam when road change to 2-way from one way.

Just flash once and most people will switch to low beam. For those new or never learned the rule, blame on your luck.