Does anybody know what happens when someone drives from a place where they drive on the left side of the road

Question

into a place where they drive on the right hand side of the road.

i dont mean like from the UK (LEFT) to France (RIGHT) because they dont have a land border.

i mean like from India (LEFT) to China (Right) because they have a land border

Answer 1

They change lanes on the border. Same with trains, some countries have different train tracks, they have to install different axles on the border.