1. Driving culture
There are going to be universal rules for American drivers: obey the speed limit within reason, use the left lane only for passing – I’m surprised how few people know about that one – and don’t tailgate anyone. In Texas, despite the big pickup trucks, high speed limits, and insane traffic in the urban areas, people are generally courteous… most of the time. A friendly wave or taillight flash to someone who lets you pass is always welcome.