Hang onto your driver's license--and your independence.  Stretching, walking can enhance flexibility, coordination and speed of movement needed to drive a car.
D000368:Aged; D001334:Automobile Driving / Q000523:psychology*; D015444:Exercise / Q000502:physiology* / Q000523:psychology; D006801:Humans; D009119:Muscle Contraction / Q000502:physiology; D052580:Muscle Stretching Exercises; D016059:Range of Motion, Articular / Q000502:physiology