Wow where is this place where drivers are courteous? It is the polar opposite in the UK, many drivers are selfish, aggressive and ignorant, especially around London & South East.
Conversely my mother lives near Worcester, and up there some of the drivers are insane. Nipping the wrong way round a roundabout, dashing across junctions on red. It's like they don't understand the concept of other traffic or sometimes even have actual control over the vehicle. Not everyone obviously, but enough to make my hair stand on end more than just once or twice.
I suppose it's a matter of expectations. Originally from Portugal so I'm used to seeing far worse people driving on the road.