when did usa start driving on the right
Left- and right-hand traffic In the late 1700s, traffic in the United States was RHT based on teamsters' use of large freight wagons pulled by several pairs of horses. The wagons had no driver's seat, so the (typically right-handed) postilion held his whip in his right hand and thus sat on the left rear horse. Seated on the left, the driver preferred that other wagons pass him on the left so that he could be sure to keep clear of the wheels of oncoming wagons.[13]
Left- and right-hand traffic Many of the countries with LHT are former British colonies in the Caribbean, Southern Africa, Southeast Asia, South Asia, Australia, and New Zealand. Japan, Thailand, Nepal, Bhutan, Mozambique, Suriname, East Timor, and Indonesia are among those LHT countries outside the former British Empire. In Europe, only four countries still drive on the left: the United Kingdom, Ireland, Malta, and Cyprus, all of which are on islands that have no direct road connections with countries driving on the right.