Google maps, for example, is good for finding transport options between two specified locations. It seems less good at displaying all the places that are easily reached from a particular location by a particular option (it doesn't understand "towns within one hour bus journey from here", say).
As a concrete illustration, stagecoach has a map showing the geographical area covered by one of their "megarider plus" bus tickets. Let's say I buy one of these tickets. Perhaps I want to spend the week touring around various towns and I'd like to minimise time travelling and maximise sightseeing.
Say I start in Peterborough. I'd like to see all the relevant bus routes, perhaps limited to direct connections to towns less than an hour away. I might pick some of these to visit and then iterate the process. In the end, I'd have a bunch of possible itineraries.
Do any visualisation tools like this exist?
Obviously, one could manually convert from a list of individual textual route listings but it would nice to have something graphical.