Universal subway map design rules

I think the real subtext in all these subway map redesign projects is fixing New York’s. Its subway map is particularly badly designed, nigh useless to tourists. It briefly had a simplified one in the 70s, but frankly it wasn’t that good: neither as understandable as the London style, nor as comforting as the geographically-faithful one that’s since prevailed. It’s just beautiful, which isn’t the point.