There have been some questions about what certain lights mean at that intersection, specifically some blue lights on top of the traffic lights. Watch the full video at the top of this story.

So if you’ve ever spotted a pink traffic sign, you’re probably wondering when the heck that came into play. Unlike the elusive blue stop sign, pink traffic signs are more common than you think.

Traffic signs could ... appear out of the blue, forcing drivers to press the brakes hard. Department of Transportation statistics paint a worrying picture. Running a red light is the most common ...

So why are traffic lights considered blue in Japan ... The global standard of a green light indicating “go” was set by the Vienna Convention on Road Signs and Signals Treaty in 1968.