Things to do with the tube map, Part 3

Music tube map

Potentially more useful than tube station anagrams, this map of the underground plots the history of  20th century music by genres and influences.  The full version is here, with an explanation of how it was done here:

I started out with a packet of coloured crayons, four sheets of A4 taped together and a big box of doubt, but the different character of each line quickly lent itself to a certain genre. Pop intersects with everything else, so that had to be the Circle Line; classical music for the most part occupies its own sphere, which made it perfect for the Docklands Light Railway