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原文传递 RAMP METERING FOR THE 21ST CENTURY: MINNESOTA'S EXPERIENCE APRIL 1997.

题名：	RAMP METERING FOR THE 21ST CENTURY: MINNESOTA'S EXPERIENCE APRIL 1997.
作者：	Thompson-N; Greene-S
关键词：	RAMP-METERING; MINNESOTA-; FREEWAY-RAMPS; VEHICLE-SPEED; TRAFFIC-VOLUME; TRAFFIC-MANAGEMENT; TRAFFIC-CONGESTION; TRAFFIC-SIGNAL-COORDINATION; INTELLIGENT-TRANSPORTATION-SYSTEMS; ADAPTIVE-SYSTEMS; TRAFFIC-ENGINEERING; VEHICLE-USAGE; ENVIRONMENTAL-IMPACTS
摘要：	Changing times have always brought new challenges and new opportunities to the field of Traffic Engineering. During the late 1940's, a rapidly growing economy fostered a significant increase in automobile ownership and highway miles traveled. To provide for this increase in vehicle usage, national emphasis was placed on the expansion of the roadway system. In the 1960's, it became apparent that roadway expansion alone would not solve the problem of growing travel demand. In addition, environmental impacts related to vehicle operation, such as air and noise pollution, became clearer. It was evident that extensive practical research had to be done to formulate solutions to this ever-growing problem. The 1970's did not bring much relief. Coupled with earlier concerns, traffic engineers were now faced with a deteriorating roadway infrastructure and rehabilitation efforts left little time or money to address forecasted traffic needs. Given fewer resources, traffic engineers had to now find innovative ways to do more with the existing infrastructure. The Minnesota Department of Transportation (Mn/DOT) employs several innovative, leading-edge techniques that lend themselves to the philosophy of doing more with less. One key aspect of Mn/DOT's traffic management resources is the use of freeway ramp meters. Freeway ramp meters made their debut in the Minneapolis/St. Paul Metropolitan area in the early 60's. Ramp metering evolved over the next 25 plus years in Minnesota and has proven to be very effective in achieving and maintaining desirable vehicle speeds and volumes along the freeway system. Federal, State, County, and three local cities have joined forces to implement a corridor management concept that is addressing congestion on both freeways and local roads through traffic signal and ramp meter coordination. In an effort to align freeway traffic management strategies with the goals and objectives of city and county authorities, several changes to ramp metering and to traffic signal operations are currently being tested under the Integrated Corridor Traffic Management (ICTM) project. ICTM is a federally funded Intelligent Transportation System project that combines teamwork, resources, and technology to address congestion problems in the 494 Transportation Corridor. The project is expected to improve travel times, reduce delays at ramps, provide motorists with route choices, and increase safety. This paper will focus on the ramp metering system (ICTM-RMS) developed within the Sydney Coordinated Adaptive Traffic System (SCATS). SCATS provides adaptive ramp metering and traffic signals. It will highlight RMS features being tested and present preliminary evaluation results.
总页数：	Conference Title: Merging the Transportation and Communications Revolutions. Abstracts for ITS America Seventh Annual Meeting and Exposition. Location: Washington, D.C. Sponsored by: ITS America. Held: 19970602-19970605. 1997. pp16
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