Yeah I drive around 3 hours on the highway every several weeks. Sometimes on my drive, there's obviously traffic. A lot of times it will be something like rush hour traffic, a crash, construction, etc.

But then like...a good portion of the time when I come to the very front of the "clog", I find that it is just a blockade of multiple people going incredibly slowly and taking up all lanes of traffic, refusing to move over despite the fact that they are going under the speed limit.