Threshold braking
Threshold braking or limit braking is a technique wherein the driver adjusts control of the brake system in an attempt to maximize the braking force of the vehicle. Done properly, this reduces the time and travel distance required to stop the vehicle to optimal amounts, or when racing, allows the driver to delay braking when entering a corner. The optimal amount of braking force is developed on a wheel at the point when the wheel just begins to slip. Braking beyond this point, as the tire begins to slide, the friction force between the tire and driving surface transitions from the static friction range into the kinetic friction range. The friction force developed between the tire and driving surface is proportional to the coefficient of friction for the combination of materials involved, namely, the tire (usually rubber) and the surface (asphalt, dirt, ice).