F1 Glossary · rules
DRS
Also known as: Drag Reduction System
DRS is an adjustable rear wing flap that reduces aerodynamic drag to help drivers overtake opponents on straight sections of the track.
How DRS Works
The Drag Reduction System (DRS) is a driver-controlled device aimed at aiding overtaking. Introduced in 2011, it allows the upper flap of the car's rear wing to lift by several centimeters via an electronic actuator. This opening reduces the wing's surface area, significantly lowering aerodynamic drag. The result is a temporary boost in top speed, typically between 10 and 12 km/h, allowing a trailing car to close the gap on a straight and move alongside an opponent.
Rules and Activation
Drivers cannot use DRS whenever they like. During a race, it is only enabled in specific "DRS Activation Zones" designated by the FIA. Furthermore, a driver must be within one second of the car ahead at a specific "Detection Point" to trigger the system. If the gap is 1.001 seconds, the wing stays shut. To ensure safety, race control disables the system during the first laps of a race or after a Safety Car restart, and in wet weather conditions where reduced downforce could cause a loss of control.
Tactical Battles and DRS Trains
DRS has fundamentally changed race strategy. A famous example of tactical usage occurred during the 2022 Saudi Arabian Grand Prix. Max Verstappen and Charles Leclerc both braked heavily before the detection line, neither wanting to be ahead at that point because the car behind would gain the DRS advantage for the following straight.
A common point of confusion for viewers is the "DRS Train." This occurs when a line of several cars are all within one second of each other. Because every car except the leader of the pack has the wing open, the speed advantage is neutralized, making it nearly impossible for anyone in the middle of the pack to move forward despite having the system active.
Common questions
- Can a driver use DRS to defend?
- Generally, no. DRS is an attacking tool. Only the trailing driver within one second of the car ahead can activate it. However, if the lead driver is also within one second of a car further ahead, they can use DRS to defend against the person behind them.
- Is DRS used during qualifying?
- Yes, but with restrictions. Drivers can use DRS in the designated activation zones during their timed laps to achieve the highest possible top speed, regardless of the gap to other cars on the track.
- Why is DRS sometimes disabled during a race?
- Race control may disable DRS for safety reasons, most commonly due to rain or standing water. Because opening the wing reduces downforce, using it on a slippery surface could cause the rear of the car to lose grip and spin.
- How do drivers know when they can use it?
- Drivers receive an audible beep in their headset and a light signal on their steering wheel display when they enter an activation zone and meet the one-second gap requirement.