Extending your idea to it's wildest reaches - could you make an app that used the GPS data and date/time of day to build a statistical model of the best street-

Extending your idea to it's wildest reaches - could you make an app that used the GPS data and date/time of day to build a statistical model of the best street-level routes and optimum time of day between any given point in the city? It would take a really long time to aggregate enough data to make it useful, but it would be pretty handy eventually.