> often travel in packs of dozens which may continue passing your house for a minute or two, which feels like an hour You're just describing a busy street of c

> often travel in packs of dozens which may continue passing your house for a minute or two, which feels like an hour You're just describing a busy street of cars here. A slow car followed by a few dozen cars who wish they were going faster is so common that almost nobody thinks about them. Individual motorcycles probably go unnoticed 9/10 times.