| GREEN FLAG Go! |
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The green flag is waved by the starter to indicate the beginning of a race, qualifying or practice session. It is waved after a caution to tell the drivers that the race has been restarted. The green flag also is an indication that the course is clear of any obstacles or debris. |
| YELLOW FLAG Caution |
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The yellow flag is the signal for drivers to use caution on the track and prepare to fall in behind the pace car after the start-finish line. The yellow flag is most often used following on track accidents but are also used for debris or oil that may have been put down on the track Drivers must be prepared to stop but are allowed to race for position back to the start finish line. |
| RED FLAG Stop! |
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Indicates a dangerous situation on or near the track and the race is being stopped immediately. In NASCAR the pace car will take position in front of the race leader and will bring the cars to a stop at a place deemed safe by officials. The red flag is generally used for conditions that can range from weather problems to accidents to surface problems such as oil on the track. A red flag often means the track has been completely blocked by an accident or debris and there is no safe route through the problem. Nascar teams are prohibited from working on the cars during a red-flag period. |
| WHITE FLAG Last Lap |
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The white flag indicates that a driver is entering the last lap of practice, qualifying or a race. It is waved continuously to all cars following the leader until the leader approaches the finish line. |
| CHECKERED FLAG Finish Line |
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The most familiar flag in Nascar for fans. The flag is
displayed to indicate that the leader has completed the required number of laps and the race is over. Drivers should slow to a safe
speed and return to the pits. The checkered flag also ends the race for cars that have not yet completed the scheduled number of laps.
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| BLACK FLAG Infraction |
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This flag is displayed along with a pit board listing the driver's car number. Generally when a driver is black flagged it means a driver must return to the pits because of a rules infraction or disqualification. It is also used to alert a driver that their car is unsafe and requires inspection or repairs. When displayed, the driver must bring the car to the pits on the next lap. Drivers sometimes ignore a black flag but doing so can result in severe penalties, including disqualification or loss of points. |
| BLUE FLAG Passing - Overtaking |
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The blue or passing flag usually is an indication to a driver that there is a faster car coming up behind him and is about to overtake him. The driver that is about to be overtaken, should permit the faster car to pass safely. Sometimes drivers resist moving over for an over-taking car when they feel they are racing for position. |
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YELLOW-RED FLAG |
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This flag is often called an "oil flag", this indicates there is a problem with, or change in, the surface ahead. This commonly means there is oil on the track. It also can mean water or another substance causing a change in the racing surface. |
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