Counterintuitively, in stop-and-go traffic everybody spends more time
watching others pass them than passing others.
Let's say you have to drive 100 km. Half of the distance your lane
moves at 100 km/h, and the other half your lane creeps along at
10 km/h. So you'll spend 50 / 100 + 50 / 10 = 5.5 hours in the
car, at an average speed of 18.18 km/h.
For every one minute you spend passing other cars, you'll spend
10 minutes watching other cars whiz by you!
Even though the fast and slow distances are evenly distributed,
all drivers perceive that they're in the wrong lane.
https://news.ycombinator.com/item?id=7622626