Simple, but Far-Flung
I think I've mentioned this before, but following a link from 
debgeisler and following on from it led me to a site showing various subway systems at the same scale. I had forgotten that the BART system, while nowhere near as complicated as the New York Subway or London Underground, and therefore having far fewer total track-miles, is huge as far as the area it covers. (When you look at the BART map, remember that when I take BART to SFO, I'm riding from the point on the lower right corner around the inverted U shape and down to the lower left corner's right branch.) In a way, it shows one of the big problems of BART -- it's trying to be an urban metro and a suburban electric commuter railroad at the same time.
debgeisler and following on from it led me to a site showing various subway systems at the same scale. I had forgotten that the BART system, while nowhere near as complicated as the New York Subway or London Underground, and therefore having far fewer total track-miles, is huge as far as the area it covers. (When you look at the BART map, remember that when I take BART to SFO, I'm riding from the point on the lower right corner around the inverted U shape and down to the lower left corner's right branch.) In a way, it shows one of the big problems of BART -- it's trying to be an urban metro and a suburban electric commuter railroad at the same time.