How do roads switch from driving on the left side of the road to driving on the right? [closed]

1. Why do we drive on the right side of the road instead of the left?
2. Why do the British drive on the opposite side of the road the rule of the road?
3. Why did Sweden switch to driving on the right?

Why do we drive on the right side of the road instead of the left?

New York, in 1804, became the first State to prescribe right hand travel on all public highways. By the Civil War, right hand travel was followed in every State. Drivers tended to sit on the right so they could ensure their buggy, wagon, or other vehicle didn't run into a roadside ditch.

Why do the British drive on the opposite side of the road the rule of the road?

Traffic congestion in 18th century London led to a law being passed to make all traffic on London Bridge keep to the left in order to reduce collisions. This rule was incorporated into the Highway Act of 1835 and was adopted throughout the British Empire.

Why did Sweden switch to driving on the right?

Sweden initiated the driving change in part because its neighbors already drove on the right side of the road. Many members of the Swedish parliament also argued that the left-hand vehicles Swedes drove had caused too many head-on collisions.