CLOSE OVERLAY

Microsimulation of Freeway Work Zones to Assess Flow and Capacity

Project Details
STATUS

Completed

START DATE

08/11/09

END DATE

08/11/09

RESEARCH CENTERS InTrans, SWZDI
SPONSORS

Wisconsin

Researchers
Principal Investigator
Alan J. Horowitz

University of Wisconsin, Milwaukee

About the research

This research applied microscopic traffic simulation to freeway work zones to further understand the relationship between traffic variables and capacity. There are two distinct forms of capacity depending upon the flow regime: capacity while traffic is free flowing and capacity while traffic is queued. Actual work zones from the Milwaukee freeway systems were varied by simulation to obtain relationships between capacity and truck volume, lane distribution, ramp location, ramp volumes, grade and merging schemes. Capacity was found to be a random variable, even when all prevailing conditions are held constant, because of stochastic variations in vehicle mix, lane distribution and driver behavior. Capacity was found to be significantly affected by prevailing conditions of grade, vehicle mix, and the lane distribution of trucks.

TOP