1. Alabama Transportation Institute, The University of Alabama, Tuscaloosa, AL, USA
2. The Institute for Rural Health Research, The University of Alabama, Tuscaloosa, AL, USA
3. Department of Civil, Construction, and Environmental Engineering, The University of Alabama, Tuscaloosa, AL, USA
4. Transportation Research Center, The University of Nevada, Las Vegas, NV, USA
5. Department of Civil and Environmental Engineering, The University of Tennessee, Knoxville, TN, USA
6. School of Social Work, The University of Alabama, Tuscaloosa, AL, USA