A handsome isochrone map produced by Melbourne’s Metropolitan Town Planning Commission to show the “minimum” (i.e., absolute best scenario) travel time into the city via suburban railways and tram lines. Some later additions to the network seem to have been pencilled in at the bottom right of the map.

Side note: Wikipedia’s article on isochrone maps includes the incredibly lazy assertion that “isochrone maps have been used in transportation planning since 1972 or earlier”, simply because that’s seemingly the earliest example the author could find to cite. This map, as well as this example from Manchester in 1914 (one hundred years ago!), clearly show that they’ve been used for this purpose for much longer. The moral of the story? Don’t trust everything you read on Wikipedia!

Source: Daniel Bowen/Flickr