Benefit

In the St. Paul, Minnesota region ramp metering has increased throughput by 30 percent and increased peak period speeds by 60 percent.


November 1997
Minneapolis-St. Paul,Minnesota,United States


Summary Information

In the Minnesota-St. Paul region, ramp metering has increased throughput by 30 percent, from 1,700 vehicles per hour (vph) to 2,200-2,400 vph. Speeds during peak hours have also increased 60 percent from an average of 48 km/h to 77 km/h. MnDOT now uses a new generation of control algorithms called an Integrated Corridor Traffic Management-Ramp Metering System (ICTM-RMS), with the old freeway management system (FMS) as a fallback. ICTM-RMS turns off the meter when not needed and automatically balances queues. Ramps can also be prioritized. The SCATS system is used in conjunction to coordinate the arterial signalized intersections and freeway entrance ramps, thus optimizing traffic flow.

Notes:
See also:

"Partners in Mostion, 494 Transporation Corridor: ICTM project, Interim Report #1," Prepared for ICTM Evaluation Committee by HNTB Corporation, undated.

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Source

Ramp up the Volume

Published By: ITS International

Source Date: November 1997


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Goal Areas

Efficiency

Typical Deployment Locations

Metropolitan Areas

Keywords

ramp meters, coordinated signals, signal coordination, centralized signal control, signal synchronization, traffic signals, advanced signal control, signal timing optimization, coordinated signal control, advanced signal controller, traffic signal retiming, retiming

Benefit ID: 2000-00049