Bit shaky about your NASCAR? Well, I'm going to make a NASCAR series of 文章 called NASCAR 101.
Green:
The track is clear and cars may proceed at speed. This flag is used to signal the beginning of the race and any restarts.
Yellow (Caution):
The track is not clear, slow down and hold your position behind the pace car. This flag is used to signal an accident, debris caused 由 contract 或者 mechanical failure, 或者 weather-related issues. NASCAR rules allow cars to bunch up behind the leader. In most cases, lead-lap cars restart in the outside lane, while any lapped cars restart to the inside....
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