A simulation study of existing ITS (traveler information, ramp metering, and DMS) on a Detroit freeway demonstrated how these technologies were beneficial to corridor capacity.
ITS in the corridor consisted of internet-based pre-trip advanced traveler information systems (ATIS), highway advisory radio (HAR), ramp metering, and dynamic message signs (DMS). The performance of these systems was analyzed through a series of simulations that evaluated four alternatives:
- Ramp metering.
- Variable message signs.
- Existing-ITS (ATIS, HAR, ramp metering, and DMS).
The INTEGRATION simulation model was used to generate peak PM arterial and freeway corridor conditions for roughly 40,000 to 50,000 vehicles per hour during 80 different scenarios of impedance (varied weather, incident patterns, etc.). The model was calibrated using flow and speed data derived from field observations.
Results from simulation testing indicated the existing ITS systems were beneficial to corridor capacity. Ramp metering was most effective at reducing congestion during major incidents, however, the study questioned its use in the absence of incidents or during minor incidents.
Author: Shah, Vaishali and Karl Wunderlich
Published By: Federal Highway Administration, U.S. DOT
Prepared by Mitretek for the U.S. DOT
Source Date: July 2001
EDL Number: 13586URL: http://ntl.bts.gov/lib/jpodocs/repts_te/13586.html
Average User Rating
Intelligent Transportation Systems > Freeway Management > Information Dissemination > Dynamic Message Signs
Intelligent Transportation Systems > Freeway Management > Information Dissemination > Highway Advisory Radio
Intelligent Transportation Systems > Freeway Management > Ramp Control > Ramp Metering
Intelligent Transportation Systems > Traveler Information > Pre-Trip Information > Internet/Wireless
Typical Deployment Locations
DMS, CMS, VMS, Changeable Message Signs, Variable Message Signs, HAR, ramp meters