An excellent idea ... and one that Reston, Virginia, where I (almost) hang my hat (you can walk to Reston from here) has been practicing for more than half a century. Though the New Urbanism roots of Reston have taken a beating over the years, there is still enough of the original plan to make you see the point and offer up a silent cheer for it.
I had just such a moment yesterday, when I fast walked on one of its many paved paths. Signposts directed me to South Lakes Village Center one direction and Hunters Woods Village Center the other. I didn't walk to either, but just knowing I could ... made all the difference.
(A photo of Lake Anne taken from the top floor of Heron House, in Reston's oldest village center.)