From VG247: “When cars slide, they leave tyre marks. In a game like Driver, theyre an aesthetic touch, part of the inherent cool of a handbrake turn. But those dark shadows in the road also tell a story. From tyre marks, you can determine the speed of a vehicle, when it started to skid, and its ultimate direction of travel long after the car itself has vanished into the distance.”

Source: N4G PC Inside the Driver game that died so that Watch Dogs could live