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]
Driver's licenses in the United States As the number of motor vehicles reached tens of thousands, state and local governments assumed a new power: authorizing vehicles and drivers. In 1901, New York became the first state to register automobiles; by 1918 all states required license plates. States were slower to require licenses for drivers. Only 39 states issued them by 1935 and few required a test, despite widespread concern about incompetent drivers. Early motorists were taught to drive by automobile salesmen, family and friends, or organizations like the YMCA. By the 1930s, many high schools offered driver education.[2]