左側通行／右ハンドル を英語に訳すと？

Japan uses left-hand traffic, and the U.S. right-hand traffic.

In Japan you drive on the left-hand side of the road, and in the U.S. the right-hand side.

Vehicles in Japan use right-hand drive, and those in the U.S. left-hand drive.

Vehicles in Japan have the steering wheel on the right-hand side, and those in the U.S. the left-hand side.

ちなみに世界の3分の2くらいは、右側通行です。