>You should always look both ways regardless of which side a car is driving on.
This is true, but when I finally went to a right-side country (Czechia) at age 29, I discovered that contrary to what I believed, I must not be, because I kept only looking right.
Concur. I believe that regardless of whether you look both ways or just one, if you're not expecting cars to be oncoming in a certain direction you're unlikely to see them.
