These travel time maps show how well, or badly, British cities are connected by rail | CityMetric
▻http://www.citymetric.com/transport/these-travel-time-maps-show-how-well-or-badly-british-cities-are-connect
There are two different ways of measuring distance. (Actually, there are more, perhaps infinitely more, but for the purposes of this story we shall go with two.)
You can do it as-the-crow-flies, drawing a straight line to find the shortest distance between two points; or you can consider how long it would actually take you to get from point A to point B. Of these two methods, the former has the advantage of being objective, scientific and accurate; but it’s the latter that actually chimes with human experience of the world.
