I agree that the Zone map can look confusing, Many long-time DC residents dont understand it themselves. Part of the reason is that the map looks like it was drawn by Amerigo Vespucci in 1492 AD. But I am not a fan of the meter sytem. DC is one of the few major cities that has not gone to a meter system. The meter seems to tick even if the cab is not moving. And who knows how those things are calibrated? The driver could change them himself for all I know. But thanks for the website. it puts things in a much better perspective.