There are a lot of drivers who believe it's a competition, and must get ahead of every car possible on their trip. Where I get on the highway in the morning there are two lanes on the road heading to the entrance ramp. About 80% of the cars going that direction are heading for the highway. Traffic is moving at the speed limit of 40. And every single day, there will be drivers flying in the left lane at 60 who cut over at the last second to the ramp.
You have to be ready to hit the brake as you near the ramp which is ridiculous. Those cars could have smoothly moved over to the right lane any time in the previous 200 yards but no, they have to cut someone off at the last second.
I drove on the NYS thruway yesterday afternoon - it was filled with asshole drivers. The worst was when a trooper had someone pulled over; everyone moved to the left (per law) lane and merged in politely, traffic had slowed maybe 5mph in the left lane, but was still going the speed limit; cars were pretty close together. Some a..hole flew down the right lane, passed about 15 cars looking for a spot to get in, slammed on his brakes and swerved into the left lane, 100 feet before he got to the trooper's car. I think everyone saw him and thought the same thing, "this asshole is going to pass everyone on the right and illegally go by the trooper." Vehicles were locking their brakes as a result; it wouldn't surprise me if somewhere behind me, vehicles collided. Scared the hell out of me; I was hauling a heavy boat and was barely able to stop in time.
Other a..holes would fly down the right lane between cars going 60 in a 65 zone, and then suddenly merge into the left lane, cutting off someone in order to merge in. And again, brake, brake, brake, brake, brake all the way down the line. These a..holes didn't comprehend that they were the reason the left lane had been getting slower; prior to cutting people off, the left lane had been moving 75-80.
And, of course, you had your idiots going 66 to pass someone going 65, with no one in front of them in the left lane.