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- W16191380 abstract "This paper compares the performance of adaptive control using the Split, Cycle and Offset Optimization Technique (SCOOT) relative to a fixed-time plan based control. A four-intersection test corridor is modeled using the Corridor Simulation (CORSIM) program. Five sets of traffic flows were generated testing the corridor at increasing volumes from a volume to capacity (v/c) ratios of 0.7 through 1.1. The corridor was evaluated with pre-timed, actuated-coordinated actuated-uncoordinated, and fully actuated strategies to determine the most optimal one. This was used in comparing SCOOT performance relative to the optimal signal timing. The corridor is controlled by SCOOT through the SCOOT-CORSIM Interface which allows an actual SCOOT system to get detector information from CORSIM and provide signal timing to CORSIM. Results of the test corridor show that SCOOT reduces delay by 8% at the 0.7 v/c, which increases to 13% at a v/c of 0.9. Minimal improvements are observed as the corridor approaches saturation. This indicates that substantial savings are available with SCOOT during under-saturated flow conditions and SCOOT helps postpone the onset of congestion, but SCOOT operates much like a fixed time system once flows reaches saturation. Two real-world corridors were tested with SCOOT reducing overall corridor delays by 14% and 11%. Further, this paper shows the importance of validating the SCOOT system properly. The simple activation of SCOOT, without any validation, provides a 219% increase in corridor delays over the fixed time plan. After validation, the results show a delay reduction of 8% over fixed time control. The validation findings dispel the idea that adaptive control systems are plug and play" @default.
- W16191380 created "2016-06-24" @default.
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- W16191380 date "2003-01-01" @default.
- W16191380 modified "2023-09-27" @default.
- W16191380 title "SCOOT ADAPTIVE SIGNAL CONTROL : AN EVALUATION OF ITS EFFECTIVENESS OVER A RANGE OF CONGESTION INTENSITIES" @default.
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