Green Track
A Green Track in motorsport is a racing surface that has little to no rubber deposited on it from previous tire use, resulting in a slippery track with reduced grip for drivers.
When race cars drive around a track, their tires leave behind tiny amounts of rubber that build up over time. This rubber buildup actually helps create more grip and traction for the cars. However, when a track lacks this rubber layer, it's called a "green track" - similar to how inexperienced drivers are called "green" because they're new.
You'll typically encounter green track conditions in several situations. New racing circuits that haven't hosted many events will naturally have green surfaces. Tracks also become green after being thoroughly cleaned during maintenance or after heavy rainfall, which washes away the accumulated rubber buildup.
The most noticeable effect of a green track is significantly reduced grip levels. Cars will slide more easily, braking distances increase, and cornering speeds must be lower. This makes driving more challenging and can catch inexperienced drivers off guard who expect normal grip levels.
Green track conditions also cause increased tire wear. Since the tires can't grip the surface as effectively, they tend to slide and scrub more, wearing down the rubber compounds faster than on a well-rubbered track surface.
Track conditions change dramatically as more cars run laps. Each vehicle deposits rubber, gradually building up the grip levels. This means a track that starts green on Friday practice can have excellent grip by Sunday's race, creating evolving conditions throughout a race weekend.
Understanding green track conditions helps explain why lap times are often slower during early practice sessions and why drivers may struggle with car control when track conditions are less than optimal.