Variable gear ratio mechanism variably sets {HEAD ~ a ratio} defining a pivot angle of steered wheels of the vehicle to a steering angle of a steering wheel of {TAIL ~ the vehicle} 
Variable gear ratio mechanism variably sets { HEAD ~ a ratio } defining a pivot angle of steered wheels of the vehicle to a steering angle of a steering wheel of { TAIL ~ the vehicle }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL