While CyclePhilly is just starting to measure bicycle trips, Strava's worldwide heat map of cycling and running routes has generated an incredible amount of interest.
Click on the arrow under the Facebook icon to view the map
It's important to note that this data is a small subset of all bike trips, generally Strava app users tend to be enthusiasts. Zoom in on the map and you will see data gaps in low income and working class neighborhoods. And some of the popular suburban and rural roads highlighted may intimidate casual riders. Still with absolutely no bike traffic data available statewide, this map can be useful for those planning a route and to some degree a tool in bike improvement planning. Even Six Flags Great Adventure, one of the most auto centric destinations in the state has Strava waypoints.