It's not just deadheading that is the problem. It's also the traffic caused by them stopping in the middle of lanes for pickups and dropoffs, driving around goi

It's not just deadheading that is the problem. It's also the traffic caused by them stopping in the middle of lanes for pickups and dropoffs, driving around going 3mph looking for their pickup, and various other behaviors. None of those things are very problematic on very small scales...an inconvenience at most. But just a tad more than that, and it can create absolute chaos.