sentences:  As of 2016 the NTSB has not directly investigated passenger car and light truck brake-by-wire vehicle accidents, and the manufacturers have taken the position that their vehicles are completely safe, and that all reported accidents are the result of "driver error".Wheel speed data are also vital in a brake-by-wire system to avoid skidding.The design of a brake-by-wire car should provide safeguards against missing some of the data samples provided by the safety-critical sensors.