There are 50 states in the U.S. with their own laws and varying speed limits. Interstate speed limits range between 55 and 75 mph and in Montana there are none. Limited-access rural interstates – 55 to 75 mph (Montana – none).
Limited-access urban interstates – 55 to 70 mph.
Other limited-access roads and other roads – 45 to 70 mph (d.c. – 25).
Drive on the right, overtake on the left.
Forty-nine states (all except New Hampshire) and the district of Columbia have mandatory safety belt laws. In most states, these laws cover front-seat occupants only, although belt laws in 12 jurisdictions (Alaska, California, District of Columbia, Kentucky, Maine, Massachusetts, Montana, Nevada, Oregon, Rhode Island, Vermont, and Washington) cover all rear seat occupants, too.
While a school bus is loading or unloading, traffic in both directions must stop.
Beware of the strange custom in Georgia where if you ‘carve up’ a driver, you should raise two fingers (v sign) to them to indicate your regret.
There are no roundabouts in the USA but lots of crossroads. Therefore, everyone sits and waits – there seems to be an unwritten courtesy about who goes first.
When leaving an interstate, slow down only when you are totally in the deceleration lane.