Bike Maps That Give Riders the Info They Actually Need is an article that should be addressed in every city. Hopefully, this gets discussed at the National Bike Summit and can shed some light on this to the greater public. The gist of it stems from a coordinator in Portland, Oregon who deconstructed the population into four groups of cyclists. With better maps informing the difficulty of the particular route via coloring, the more at ease a rider might be when tooling around town.
Better yet a map system that shows the routes when taking varying forms of transportation like in the image below. Click on it to read more. Chances are the biking route would be best regardless of how challenging it is, since it changes our body and mind, like a shot of Prozac & Ritalin (but no negative side effects). Now that statement wasn't thoroughly researched, but this article thinks it should be.
The GLP, Green Lane Project, is on the case. You may have noticed there has been a change in bike as transportation, as this article states.