By the end of 2009 we have added Multi-Axle Air Brake software to the website. This particular program allows 12 axles or 24 brakes to be analyzed with respect to braking effectiveness, that is, deceleration. No dynamic axle load transfer and hence no individual brake lockup is calculated. In typical truck run-away cases brake fade, out-of adjustment brakes, and often overloading are critical, and braking skid marks are rarely observed.