How big is the 90 minute public transit commuter zone for London vs San Francisco? This is my attempt to answer the question. Arrival point is central London or downtown SF. So, light areas = you ought to be able to reach central London/downtown SF within 90 minutes. pic.twitter.com/ZSftRqN1bL
— Alasdair Rae (@undertheraedar) February 6, 2020