I seem to have this most days - going along at 60mph on a national speed limit road, when all of a sudden a car pulls out ahead. Within no time Ive caught up with them. They then start drive at 40mph, leading to cars crawling along behind them.
WHY do cars pull out when they can see cars are coming, and when they know they're going to drive much less than the speed limit? This is not an especially busy road - there will be chances for them to pull out without any traffic coming.