Formula 1 integrates DRS system.

For many many years F1 racing has been a sport in which winning not only meant having a good driver but also having a very technological car to get where he needs to go, the podium. Nowadays, F1 cars have been engineered to have a lot of down force. This pushes the car down to the road to help the cars turn very quickly and get a lot of grip on the track. Some of this down force is generated by fins put on the back of the car at slanted angles. These fins help with going through corners, but hurt a car's speed on a straight-away. The DRS (Drag Reduction System) flattens out the fins during a short period of time on certain straights, allowing for a car to get a boost in speed almost. This allows cars using the system to possibly make passes that would otherwise be impossible. This being the first year of the system's use, not many drivers have started using the system because of the dangers involved. If a driver was to not make a full pass before a sharp bend then said driver could be bumped off course and sent careening into a wall. The system is controversial now, and it has still not been decided whether the system will be used again next season.
-_man(Grayson Norris)

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Photo courtesy of CARLOS62 on Flickr.

If you really want to get technical, check out this site that breaks down the math of the system.