The improbability of probabilistic error analyses for numerical computations

A wheel speed safety signal system that includes first and second switches actuated by engine manifold pressure in response to rapid acceleration and rapid declaration, respectively. The switches may be used to activate internal monitor panel lights for advising operators of excessive deceleration or acceleration, and can be connected to a pollution control device ignitor for burning excess exhaust-carried hydrocarbons during rapid acceleration or deceleration. The switch responsive to excessive deceleration may be connected to activate a vehicle external rear warning light to advise other vehicle operators of rapid deceleration with possible imminent braking of the vehicle before the standard red braking light appears.