MODELING LATENT STATES IN DRIVING BEHAVIOR Charisma F. Choudhury * Graduate Student, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology cfc@mit.edu Moshe E. Ben-Akiva Professor, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology mba@mit.edu Tomer Toledo Senior Lecturer, Department of Civil and Environmental Engineering, Technion - Israel Institute of Technology toledo@technion.ac.il Anita Rao Graduate Student, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology anitarao@mit.edu Gunwoo Lee Graduate Student, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology gwlee77@mit.edu *Corresponding Author