1 Freeway Micro-simulation Calibration: Case Study Using Aimsun and VISSIM with Detailed Field Data Xiao-Yun Lu, Ph. D. (Corresponding Author), Research Engineer California PATH Program, ITS, U. C. Berkeley 1357 S. 46th Street, Richmond Field Station, Bldg 452, Richmond, CA 94804-4648 Tel: 1-510-665-3644, Email: xiaoyun.lu@berkeley.edu Joyoung Lee, Ph.D. Center for Transportation Studies, Department of Civil and Environmental Engineering University of Virginia, 351 McCormick Rd, Charlottesville, VA 22904 Tel: (434) 806-3152, email: jl9hc@virginia.edu Danjue Chen, Ph. D. California PATH Program, U. C. Berkeley 1357 S. 46th Street, Richmond Field Station, Bldg 452, Richmond, CA 94804-4648 Tel: 1-510-665-3644, Email: danjuechen@berkeley.edu Joe Bared, Ph.D. P.E, Team Leader Transportation Operations Concepts and Analysis Team Federal Highway Administration (FHWA), 6300 Georgetown Pike, McLean, VA 22101 Tel: (202) 493-3314, email: Joe.Bared@dot.gov Daniel Dailey, Ph.D. Visiting Professor, FHWA Office of Operations R&D Professor, University of WashingtonSeattle, WA 91895 Tel: (202) 493‐3395, email: Daniel.Dailey.CTR@dot.gov Steven E. Shladover, Sc. D., Research Engineer California PATH Program, ITS, U. C. Berkeley 1357 S. 46th Street, Richmond Field Station, Bldg 452, Richmond, CA 94804-4648 Tel: 1-510-665-3514, email: steve@path.berkeley.edu For presentation and publication at 93 rd TRB Annual Meeting Washington, D.C. Jan. 12-16, 2014 Submitted on: July 31, 2013 Words: 5466 Figures: 4 x 250 = 1000 Tables: 4 x 250 = 1000 Total Word Count: 7466