A single waved flag denotes a hazard on the racing surface itself.The manner of display depends on the location of the hazard: In Formula One racing, a yellow flag displayed at the starter's stand or a marshal station indicates that there is a hazard "downstream" of the station. However, the procedures for displaying the yellow flag vary for different racing styles and sanctioning bodies. The solid yellow flag, or caution flag, universally requires drivers to slow down due to a hazard on the track, typically an accident, a stopped car, debris or light rain. In some series, the green flag is waved at the rear of the grid following the formation lap to indicate to the official controlling the race start that the final car has reached its starting position and the race can be started.This practice is retained on occasion in the event of equipment failure, or simply as a tradition, such as at the 24 Hours of Le Mans. Before the use of starting lights in Formula One and most other FIA sanctioned or associated events, the national flag of the country in which a race is occurring, instead of a green flag, was used to signal its start.Since roughly the 1990s, some races on occasion invite celebrity guests to wave the green flag at the start of the race.Green flags waved at restarts were single. In 1980, USAC flagman Duane Sweeney started a tradition at the Indianapolis 500 of waving twin green flags for added visual effect at the start of the race.The officials will utilize the cars in the field to facilitate the final drying of the course, but in order to not waste fuel (affecting fuel strategy, etc.), and delay the race further, the laps are counted towards the advertised race distance. This is sometimes called a "running yellow" and usually occurs when a track is drying after a rain delay. In NASCAR, a green and yellow flag waved at the same time indicates that the race is being started or restarted under caution and laps are being counted.A separate green flag displayed at the entrance to the pit area indicate that the pits are open.When shown at a marshalling post, a green flag may indicate the end of a local yellow-flag zone.At all times, however, the green lights remain lit. No flag displayed at the starter's stand implies safe, green-flag conditions. However, the flag itself is typically not continuously waved by the starter. If the race is not under caution or delayed, it is said to be under green-flag conditions. The waving of a green flag is almost universally supplemented with the illumination of green lights (resembling traffic lights) at various intervals around the course, particularly on ovals. During a race, it is displayed at the end of a caution period or a temporary delay to indicate that the race is restarting. The solid green flag is usually displayed by the starter to indicate the start of a race. The green flag signals a clear track to race on and the start of the race. In addition, the green, yellow, and red flags described below may be augmented or replaced by lights at various points around the circuit. Status flags are used to inform all drivers of the general status of the course during a race. Start of race (if starting lights not available) No overtaking, slow down to 60 km/h (37 mph)ĭebris/fluid on track (Road courses only)įaster vehicles approaching /About to be lapped and must allow car to pass Race starting or restarting under caution Start of race/End of Caution/Pit Lane openĮnd of Caution period/End of Caution section/Ready to start race FIA-sanctioned championship flags are the most commonly used internationally (outside of North America) as they cover championships such as Formula 1, the FIA World Endurance Championship and WTCC, and are adopted (and sometimes adapted) by many more motorsport governing bodies across the world such as, for example, the MSA. For example, the chequered flag is commonly used across all of motorsport to signify the end of a session (practice, qualifying, or race), while the penalty flags differ from series to series. While there is no universal system of racing flags across all of motorsports, most series have standardized them, with some flags carrying over between series. Alternatively, some race tracks employ lights to supplement the primary flag at the start/finish line. Track marshals are also stationed at observation posts along the race track in order to communicate both local and course-wide conditions to drivers. Typically, the starter, sometimes the grand marshal of a race, waves the flags atop a flag stand near the start/finish line. Racing flags are traditionally used in auto racing and similar motorsports to indicate track conditions and to communicate important messages to drivers.
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