- Mem,
Honestly, when you're sitting in the opposite seat, it comes pretty naturally. It usually only takes me a couple of minutes to readjust and that is just getting used to the change in relative position of the rest of the car. I've never tried to head off in the wrong lane!
I would be afraid to drive in a country that drives in the opposite lanes that I am accutomed to. Because if you come to an intersection where there are no cars or no one way signs, I would worry that my instincts would put me in the wrong direction.
But the head on collision discussion is about the Jersey barriers, when you are driving in the right lane and swerve into the wrong on-coming by mistake or if you slide on a slick or ice covered road.