Even World War Z suffers from this

What’s even weirder: post-plague novels have this problem. So, fine, most people do not own a bicycle. But if 99+% of the population has just died surely there is a bicycle for each and every person still alive. Hiking is really optional in such a scenario. The average travel speed should be above 10 mph if almost everyone dies.

via FuturePundit: If You Want To Write A Disaster Novel.