Transit map designer Jug Cerović has reposted a look at the state of the art of European bus network maps. “I have studied more than 250 European cities and their bus maps, and have also designed a few. Here are some observations about the state of the practice.” He groups bus maps into three categories, based on how they use colour: maps that use colour to show the technology used (bus, metro, subway); maps that use colour to indicate individual lines; and maps that use colour and width to show bus frequency. Now Jug shows examples of each, and goes through the pros and cons, but he does have some skin in this game: he’s a fan of frequency maps, which he suggests solves the problems of the other two kinds, and in fact has produced frequency maps for Luxembourg (above) and Utrecht. Definitely worth a read if you’re interested in transit map design.