I remember being interviewed in the DC area, where I was asked a question involving subway systems and routes. Being a mid-western lad completely unfamiliar wi

I remember being interviewed in the DC area, where I was asked a question involving subway systems and routes. Being a mid-western lad completely unfamiliar with subways (and mass transit in general), I had a lot of trouble visualizing it. I would imagine that people who rode mass transit on a regular basis wouldn't have as much difficulty. Got a job offer anyway, though.