9/23/01 Estimating Median Velocity Instead of Mean Velocity at Single Loop Detectors Benjamin Coifman, PhD Assistant Professor, Civil and Environmental Engineering and Geodetic Science Assistant Professor, Electrical Engineering Ohio State University 470 Hitchcock Hall 2070 Neil Ave Columbus, OH 43210 Coifman.1@OSU.edu http://www-ceg.eng.ohio-state.edu/~coifman 614 292-4282 Sudha Dhoorjaty Ohio State University Department of Electrical Engineering Columbus, OH 43210 dhoorjas@ee.eng.ohio-state.edu Zu-Hsu Lee University of California Department of Industrial Engineering and Operations Research Berkeley, CA 94720 leez@ieor.berkeley.edu Submitted for publication in Transportation Research-C