That's actually different. The stress of being at the doctors causes blood pressure to elevate vs more mundane things like running, walking, driving stress. The difference is someone without white coat syndrome will have a lower blood pressure reading at the end of the doctors visit.

Honestly I think in most US cities the driving stress would drive ones BP far higher. I know one time just right before I got to the Drs office some one almost ran into me, I mean just missed, and my BP was way high still.