Variable valve timing, variable intake geometry, anti-lock braking systems and traction control are all forbidden.
en.wikipedia.org The most notable advance was the fitment of anti-lock braking system, the first time this feature had been made standard across the whole range on a mass-produced car.
en.wikipedia.org Some anti-lock systems can apply or release braking pressure 15 times per second.
en.wikipedia.org Nowadays, however, this area contains highly advanced systems such as anti-lock braking system, electronic stability control and collision warning/avoidance through automatic braking.
en.wikipedia.org Additional factors include steering angles, braking, use of lights, turn signals, speed, acceleration, engine rpm, cruise control, and anti-lock brakes.
en.wikipedia.org