'The Simpsons' Unveils a New Springfield Public Transit Map

This Sunday's Simpsons may have drawn middling reviews from some quarters, but it was important in one major way: The episode provided a much-needed update to the extent of Springfield's public-transit system, which is revealed to include many color-coded lines and stations like Mattress City, Guidopolis, Unauthorized Beatles Museum, and the "Varmint District."

Thanks to Cameron Booth, who runs the wonderful site Transit Maps, the world can now carefully inspect how far the Springfield Transit Authority has evolved. Last we knew, the city's subway system was mostly inoperative because its creaky, vibrating trains were damaging the foundations of buildings. In terms of routes, it was a simplistic loop with small tentacles snaking into a Bridge Street Station and a Harbor Station, like so: