放狗查了一下， 好像在这方面各州交通规则并不完全相同，有下面一句话

来源: 于 2023-09-26 06:15:48 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

Solid Yellow－ A yellow signal light means "CAUTION." The red signal is about to appear.
When you see the yellow light, stop if you can do so safely. If you cannot stop safely, cross the intersection cautiously.