The Long History of Driving on the Left or Right Side of the Road

Conestoga wagons developed in the 1700s for transport had drivers on the left, establishing keep-right norms before cars.

New York formalized keep-right rules in 1804, long before Ford's left-side steering Model T.

Napoleon spreading his empire dictated driving on the right, but Britain defiantly kept left.

Sweden was the odd neutral holdout in Europe, before finally switching to drive on the right in 1967.

Driving in opposite-side countries requires extra focus, like talking aloud and having an extra watchful passenger.