It you ride on the right side of the road, then your contact patch would be leftward. Especially on surface roads where the water run-off slope is more pronounced. Interstates are, for the most part
level except in curve banking. On a NASCAR's right front tire, you can run your fingers under it from the outside, up to your thumb, when the car is sitting still on level pavement. The tire is given this cant angle so that when the car goes into left hand banking at speed, the tire will have a full contact patch, offering the best grip in the turn. Make sense? Also, for the first time, this year, all Sprint Cup cars will be equipped with voice prompting GPS's. Yes, can you believe that!! They will have a sexy female voice saying, TURN LEFT, TURN LEFT, TURN LEFT, TURN LEFT....
Mac