Vehicles (like Cars) shall broadcast (connection less wireless transmission) its information like angle of steering, tacho meter reading of the wheels (speed), fuel level, meter reading etc...

This opens up lots of possibilities without a compromise on security (as it is connection less and a simple broadcast. receiver design does not effect robustness (or state machines) of car s/w).

A GPS navigation device (or Apps) can use car's steering angle, speed information to calculate its new geo position (when GPS satellites are not visible) in reference to previous known geo position (like GPS position)