Major Pet Peeve. The No-Reason Traffic Jam and I-94 is the epicenter. You will slow to a crawl wondering where the accident is and there is no accident and there's no extra traffic merging. SO WHY AM I GOING 7 MPH ON A FREEWAY!
Also, those who won't even get up to the speed limit in the left lane and just keep puttering along while everyone is passing them on the right. Ticket them and take their license away until they understand the flow of all the lanes.
And don't get me started on people who do not react to a green light until someone honks at them. I usually assume it's someone on their phone but sometimes it's someone just staring into space. Self-driving cars can't be worse.
Flying cars are possible. They could be made, but as long as we keep driving like this on the ground, they're never gonna let us take to the air and based on the dwindling attention span of the population, that'll be never.