Title :
Methodological calibration of the cell transmission model
Author :
Munoz, Laura ; Sun, Xiaotian ; Sun, Dengfeng ; Gomes, Gabriel ; Horowitz, Roberto
Author_Institution :
Dept. of Mech. Eng., California Univ., Berkeley, CA, USA
fDate :
June 30 2004-July 2 2004
Abstract :
A semi-automated method has been developed for calibrating the parameters of a modified version of Daganzo´s cell transmission model (CTM). A least-squares data fitting approach was applied to loop detector data to determine free-flow speeds, congestion-wave speeds, and jam densities for specified subsections of a freeway segment. Bottleneck capacities were estimated from measured mainline and on-ramp flows. The calibration method was tested on a 14-mile portion of Interstate 210 Westbound in southern California. The calibrated CTM was able to reproduce observed bottleneck locations and the approximate behavior of traffic congestion, yielding approximately 6%, or less, error in the predicted total travel time.
Keywords :
calibration; least squares approximations; road traffic; Interstate 210 Westbound; USA; bottleneck capacity estimation; cell transmission model; congestion duration; congestion spatial extent; jam density; least-squares data fitting approach; loop detector data; methodological calibration; semiautomated method; southern California; traffic congestion; travel time prediction;
Conference_Titel :
American Control Conference, 2004. Proceedings of the 2004
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-8335-4
