Chief John Ross Bridge is the official name of the bridge everyone calls the Market Street Bridge. It's even called that on this wiki's map! It was always a darkish, muted green color until the Walnut Street Bridge got all hip and famous and someone decided the Market Street Bridge - oops, I mean the Chief John Ross Bridge - should be bright blue, too. But it still makes the cool ooh-eee-ooh sound when you drive across it, so that's cool.