For 38 years, all I've known is cars drive on the right side of the road. When crossing the street, I naturally look that way - it's ingrained in my muscle memory.
In Ireland, they drive on the left side of the road, and I can't seem to remember that. I just can't override 38 years of indoctrination, and I'm guessing I'm not alone. Dublin has clear reminders painted on the road of every pedestrian crossing.
They've essentially dummy proofed it, and this dummy is grateful.