Deploying advanced technologies and an integrated corridor management approach decreased congestion and improved traffic flow within an 8-mile corridor south of Twin Cities, Minneapolis encouraging 58% of motorists surveyed to use arterial streets for short trips rather than Interstate-494.
The Integrated Corridor Traffic Management (ICTM) project deployed a set of technologies to improve capacity and operations along a corridor that included I-494, four parallel arterial streets and seven perpendicular arterial streets. The rationale for the project was the increasing volumes of traffic and anticipated growth in the Twin Cities, MN area. Determining system impacts of the ICTM was challenging because many other significant changes took place during the 5-year deployment. Nonetheless, survey data from 400 area motorists, and interviews with agency representatives and stakeholders indicated that the deployment improved the corridor's capacity and helped to balance network traffic loads on arterials and freeways. Specific findings include the following.
The ICTM improved capacity on the parallel arterial streets through adaptive control signals.
- 49.8% of motorists surveyed revealed that, after the deployment, they are using side streets more often than they had previously for short trips. Prior to the ICTM, I-494 was used heavily for short trips , contributing to congestion levels.
- 58% of the motorists surveyed indicated that they are less likely to use I-494 for short trips. Ease of use and freeway / ramp metering congestion were cited as the primary causal factors for increasing the use of side streets for short trips.
- The majority (58%) of agency stakeholders perceived that improvements in traffic operations within the corridor contributed to changing traffic patterns and the use of available capacity, and contributed to local trips using local streets rather than I-494 freeway.
- Measures of Effectiveness (MOEs) of traffic operations improved along most corridor routes, as measured by volume-adjusted MOEs but mostly remained the same when measured against unadjusted MOEs.
- Traffic operations MOEs improved on north-south streets, considering the increased traffic demand.
- Traffic operations worsened in general on several streets during the morning peak hour.
Author: BOOZ·ALLEN & HAMILTON
Published By: Minnesota Department of Transportation
Source Date: April 2000
EDL Number: 12863URL: http://ntl.bts.gov/lib//jpodocs/repts_te//12863.pdf
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traffic signals, adaptive signals, coordinated signals, signal coordination, centralized signal control, signal synchronization, advanced signal control, signal timing optimization, coordinated signal control, advanced signal controller, traffic signal retiming, retiming