Gallup

Who's the happiest and healthiest of them all? The New York Times posts an interactive map of the national Gallup-Healthways Well-Being Index.
Mar 16, 2011   New York Times
Appreciation of diversity, social offerings, and aesthetics trump jobs, economy, and safety according to a new survey by Gallup/Knight.
Nov 16, 2010   John S. and James L. Knight Foundation
And the result is fairly obvious - longer the commute, lower the reading. Well-being is a measurement of both physical and mental health, including ailments such as back pain and anxiety. No mention of modal type (e.g, driving, biking, transit).
Aug 23, 2010   Gallup