Implementing Integrated Corridor Management (ICM) strategies on the U.S. 75 corridor in Dallas, Texas produced an estimated benefit-to-cost ratio of 20.4:1.
Results from the analysis, modeling, and simulation of ICM strategies under various operational conditions on a major corridor.
The analysis, modeling and simulation of Integrated Corridor Management (ICM) strategies on U.S. 75 combined a macroscopic trip table manipulation for determining trip patterns; a mesoscopic analysis for assessing the impact of driver behavior in reaction to ICM strategies; and a mesoscopic traffic simulation model (DIRECT) for reflecting the effects of signal timing. The analysis used 2007 as the model base year, and focused on morning peak periods.
The analysis assessed mobility, reliability and variability, and emissions and fuel consumption. Mobility measures included travel time, delay (defined as the total observed travel time less the travel time under noncongested conditions), and throughput (defined as the number of vehicles and persons per hour by direction). Reliability and variability were calculated from multiple simulated runs under all scenarios. Emissions and fuel consumption were determined by calculating and matching emission rates to reference values in EMFAC, the California Air Resources Board's emission factors model. The values were monetized by applying costs per ton of pollutants released and the purchase price of fuel.
The study evaluated comparative travel time information (pretrip and en-route traveler information); incident signal retiming plans for arterials; incident signal retiming plans for frontage roads (frontage roads run parallel to U.S. 75); light-rail transit (LRT) smart parking system; Red Line capacity increase (Red Line is a LRT); LRT station parking expansion (private parking); and, LRT station parking expansion (valet parking).
Benefits were savings in travel time, increased travel time reliability, reduced fuel consumption, and reduced emissions production. The extent of the benefits varied by conditions on the corridor. Low demand conditions had benefits of $8.0 million per year largely attributable to saved fuel consumption on the arterial street system from improved signal timing during incident conditions. Medium demand conditions saw a more modest benefit of $2.0 million per year attributable to the disbenefit of diverting traffic from the arterial system onto the freeway system (other than U.S. 75), offset by the benefit of reduced congestion on the arterial system. High demand conditions produced significant improvements systemwide in travel time savings, resulting in a $6.3 million benefit throughout the year.
- The benefit-to-cost ratio over the 10 year life cycle of the project was estimated as 20.4:1.
- Expected annual savings included 740,000 person-hours of travel, a reduction of fuel consumption by 981,000 gallons of fuel, and a reduction of 9,400 tons of vehicular emissions.
Integrated Corridor Management: Analysis, Modeling, and Simulation for the U.S. 75 Corridor in Dallas, Texas
Author: Cambridge Systematics, Inc.
Published By: Cambridge Systematics
Prepared by Cambridge Systematics for the U.S. DOT
Source Date: September 2010
EDL Number: Forthcoming
Average User Rating
Intelligent Transportation Systems > Traveler Information > Pre-Trip Information
Intelligent Transportation Systems > Arterial Management > Traffic Control > Adaptive Signal Control
Intelligent Transportation Systems > Freeway Management
Intelligent Transportation Systems > Transit Management
Intelligent Transportation Systems > Traveler Information > En Route Information
Related Metropolitan Integration Links
Link 13: Freeway Management to Incident Management
Link 14a: Transit Management to Traveler Information
Link 2: Arterial Management to Freeway Management
Link 29: Transit Management to Incident Management
Link 3: Arterial Management to Transit Management
Link 4: Arterial Management to Incident Management
Link 6: Incident Management to Traveler Information
Link 9: Incident Management to Transit Management
Typical Deployment Locations
traffic signals, adaptive signals