VEHICLE SAFETY AND RESTRAINT SYSTEMS design involves many compromises and tradeoffs to optimize the system performance required by federal safety standards. These standards apply to many different vehicles, each with unique readability and crush characteristics. Thus, for each vehicle, safety and system-initiation sensors and safety system actuators must be calibrated, or modulated, to operate in a beneficial manner. Simply put, this means that these systems must not operate too early or too late in a scenario requiring their actuation, and this applies to SRS, ABS, and TCS features. The overall record is very good, and a tabulation of lives-saved versus injury-induced data has already been shown in Fig. 3.1.