acidfast7

Not really. It's more the cost of the train/bus than anything else. No one drives in London (or even into London due to the £11.5/day charge to do so ... that's just to enter, not to park or anything else.)

Here are the fares ...

http://content.tfl.gov.uk/adult-fares.pdf

Median wage is £34K/year in London. That's pre-tax or about £26K post-tax.

A yearly subway pass hovers between £1.5-£4K or up to nearly 20% of post-tax wage (or 2 months of full salary). A bicycle is significantly less.