The Green Flag
The green signal always stands for ‘start’. Green signals the start of the competition. Just like in all other races, even in NASCAR
car racing, the green flag is used at the time of commencing of the race. Sometimes, it is also used after an emergency period to indicate to the driver that the track is clear and the race can be resumed.
The Yellow Flag
A yellow flag indicates that there is some kind of obstacle on the race track and cautions drivers to slow down by maintaining a fixed speed. At this time, the race cars are required to follow the pace car which leads the way. Usually, the yellow flag primarily comes into picture when an accident occurs on the track. Also, the yellow flag is displayed in case of bad weather, fallen car parts on the track, emergency vehicle needing to cross the track, NASCAR tire check, or even if an animal has wandered onto the track. Whenever the yellow flag is displayed, it strictly forbids any participants to race and if it is not followed then the participant goes into the penalty zone. In any kind of race, the yellow flag time will last for at least three laps as this will give time for drivers to settle down and start fresh.
The White Flag
The beauty of white comes into picture to indicate that there is only one last lap left for the race to end. This will help drivers know that the finish line is almost within reach. This flag is displayed only once per race.
The Checkered Flag
The checkered flag is probably the most popular one of all the flags and indicates the finish of a race. The contestant to first reach the checkered flag is the winner of the race.
The Red Flag
Red is for stop and red flag brings the competition to a halt. Displaying the red flag is not only applicable to the drivers of the cars but also to the crew standing at the pit stop i.e. crew members who are present there to check the cars for repairs, re-fuelling, or tyre replacement. And if the crew handling a car is shown the red flag, their work in progress must stop as well. Generally, the red flag is seen during a rain delay or if the track is closed because of emergency vehicles or fatal accidents. Once the red flag is displayed, it is followed by a yellow flag for a few laps until the track is cleared. This allows drivers to warm up their engines and make a pit stop if required.
The Black Flag
In the official terms, the black flag is called the ‘consultation flag’. It is not displayed to all but to a particular driver. The driver who receives the black flag is expected go to the pit stop and respond to a NASCAR concern. The reason for the receiving black flag could be breaking of rules. The driver who is given the black flag is required to within five laps from the time of displaying the flag.
The Black Flag with a White X
A Black Flag with a White X can come into the picture only after the black flag is displayed. If even after receiving the black flag, a driver fails to stop within five laps as required, the Black Flag with a White X is shown. This flag indicates that the driver is no longer scored by NASCAR and has been disqualified.
The Blue Flag with an Orange Diagonal Stripe
This is an optional flag which is a “courtesy” flag or “move over” flag. This flag is displayed to cars to inform them that the leading cars are just behind them and tells them to be polite and give way to the leaders. It is not mandatory to follow this flag and the drivers can choose to ignore this message. Though it is an optional sign, NASCAR takes a brief look at anyone who repeatedly disregards the flag without genuine reasons.