Association between neighborhood walkability and GPS-measured walking, bicycling and vehicle time in adolescents.
Carlson JA, Saelens BE, Kerr J, Schipperijn J, Conway TL, Frank LD, Chapman JE, Glanz K, Cain KL, Sallis JF. Association between neighborhood walkability and GPS-measured walking, bicycling and vehicle time in adolescents. Health Place. 2015 Mar; 32:1-7.