Look out for railroad crossings. Unlike the UK the US railroad crossings are not well signed or protected by gates and barriers so there is a risk that an apparently clear crossing may well be carrying traffic. Approach them with caution and look for tell-tale signs such as other traffic slowing or stopping. Finding 2,000 tons of freight loco bearing down upon one is not an experience to be repeated. Traffic lights - US lights are not quite the same as ours.
Lights change from red to green, with no amber, except when moving from green to red.
It is normal practise at a red traffic light for vehicles wishing to effect a right turn to do so, once they have performed a mandatory stop at the light and established that the road is clear. It seems a little strange to us but is entirely logical. No right on red . There are basically three types of signalized intersections in the US with regard to left turns. The first is those with no left turn arrow whatsoever.