Have you considered making a map where the color at each point is the average commuting time from there to all points within a radius? For example: http://www.

Have you considered making a map where the color at each point is the average commuting time from there to all points within a radius? For example: http://www.jefftk.com/news/2010-11-17.html http://www.jefftk.com/news/2010-11-17.html The maps you've added are awesome when you know where you're looking at, but if you don't yet have a place picked out then knowing where to look is good too. A naive way to compute the kind of summary map I'm interested in is to just make the color at each point on your summary map be the average color on your map for a specific place. Something smarter could weight points by their desirability (I care more about how fast it is to downtown than to an arbitrary point in a suburb) but the naive version is pretty useful on it's own.