美国闯黄灯一样违章，只是看警察的掌握尺度。

严格讲，美国闯黄灯也违章。至少有的州明文规定黄灯亮了后，车没进垂直马路curb延长线的要停下来。我也知道有人因此吃ticket。

Driver's manual of Arizona and Pa...

A STEADY YELLOW LIGHT tells you a steady red light will soon appear. If you are driving toward an intersection and a yellow light appears, slow down and prepare to stop. If you are within the intersection or cannot stop safely before entering the intersection, continue through carefully.