The Real Time Motorist Information System (RTMIS) under development at the University of Washington uses a ratio of Volume to Occupancy with a correction factor (often denoted as "g") to estimate speed. This correction factor is a function of road topology and occupancy. This project will initially produce a value for the correction factor for every pair of loops being used in the RTMIS. It will further produce a correlation between correction factor and occupancy for each set of loop pairs. The correction factor is produced using speed estimates from cross-correlation time delay measurements of on road data.
October 15, 2007
Daniel J. Dailey, Mark P. Haselkorn, Nancy L. Nihan.
Washington State Transportation Center (TRAC)
- # of Pages: 56 p., 831 KB (PDF)
- Subject: Cross correlation, Estimates, Loop detectors, Real time information, Speed, Traffic volume, Travel time.
- Keywords: Induction loop, speed, cross correlation, volume occupancy.
- Related Publications:
This abstract was last modified April 29, 2008