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- W619825851 abstract "THE GULF FREEWAY SURVEILLANCE AND PROJECT IS DESCRIBED AS IT OPERATED IN 1969. THE EQUIPMENT CONFIGURATION, STRATEGY USED, AND OPERATIONAL MEASURES OF EFFECTIVENESS ARE PRESENTED AND COMPARED TO BEFORE CONTROL CONDITIONS. FOLLOWING ARE SOME OF THE SIGNIFICANT RESULTS OF CONTROL: (1) TOTAL TRAVEL INCREASED BY 10% DURING 6:30-8:30 AM PERIOD AND 16% DURING 7:00-8:00 AM PERIOD; (2) AVERAGE SPEED DURING PERIOD INCREASED 12.2 MPH TO 32.6 MPH; (3) ACCIDENTS DURING DECREASED 27%; AND (4) VIOLATION OF RAMP SIGNALS RANGED FROM 1% TO 13%. /AUTHOR/ THE BASIS OF MAXIMIZING THE TOTAL NUMBER OF VEHICLES SERVED, AND ALSO BALANCING THE ENTRANCE RAMP QUEUES. THE OPTIMAL STEADY-STATE COMPONENTS ARE SELECTED BY QUADRATIC PROGRAMMING. FOR ANY GIVEN VECTOR FO THESE COMPONENTS, THERE CORRESPONDS A VECTOR OF STEADY STATE DENSITIES ALONG THE FREEWAY. A LOCAL LINEARIZATION OF THE FREEWAY MODEL IS PERFORMED ABOUT THIS REFERENCE VECTOR OF DENSITIES. THE TIME-VARYING COMPONENT OF THE ENTRANCE RAMP RATES IS DETERMINED USING STANDARD STATE REGULATOR TECHNIQUES BASED ON THE LINEARIZED MODEL AND A QUADRATIC PERFORMANCE FUNCTIONAL OF DEVIATIONS FROM THE STEADY-STATE DENSITIES AND ENTRANCE-RAMP RATES. SEVERAL SIMULATION EXAMPLES ILLUSTRATE THE SUPERIORITY OF THE ALGORITHM OVER NO AND RAMP METERING BASED ONLY ON LOCAL INFORMATION ABOUT THE STATE OF THE SYSTEM. /AUTHOR/" @default.
- W619825851 created "2016-06-24" @default.
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- W619825851 date "1969-08-01" @default.
- W619825851 modified "2023-09-27" @default.
- W619825851 title "FREEWAY OPERATIONS ON THE GULF FREEWAY RAMP CONTROL SYSTEM" @default.
- W619825851 hasPublicationYear "1969" @default.
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