Bosch’s test facility is a complex track comprised of μ surfaces, traction hills, Vehicle Dynamics Area (VDA) and various other special test surfaces. The anti-lock brake test track included 2,500 ft. of acceleration and test road. The VDA features a 21-acre bituminous test pad that is 1,150 ft. long with a width from 630-880 ft. A 36 ft. x 4,300 ft. loop road to access the pad was designed with a 1,300 ft. parabolic cross section curve at the west end for testing and acceleration onto the VDA pad. Ghafari designed the original test track in 1990, as well the VDA replacement in 2008.