Do you mean axle? I had the same thought, but I believe most every car has speed sensors on all 4 wheels for anti-lock breaks and I would imagine a way of telli

Do you mean axle? I had the same thought, but I believe most every car has speed sensors on all 4 wheels for anti-lock breaks and I would imagine a way of telling the steering angle, so there are plenty of ways to get data; I'm sure more than I can think of since I'm just an occasional backyard mechanic, not an engineer.