E-c014: Traffic Analysis Software Tools (ec014. pdf)
ARTERIAL ANALYSIS AND SIGNAL TIMING TOOLS
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ARTERIAL ANALYSIS AND SIGNAL TIMING TOOLS
Arterial tools are grouped into two categories: operational analyses and signal timing designs. The analysis methods of the operational tools for uninterrupted and interrupted flow are covered explicitly in Chapters 7 and 11 of the HCM, respectively. Optimization methods for arteries are covered in two widely accepted tools, namely PASSER II and PASSER III (16, 17). Since its development in 1986, the computerized tool (HCS-Arterials) for Chapter 11 of the HCM has been extensively used by traffic engineers and transportation planners. Generally, the objective of an operational analysis is to determine the total delay and level of service for an artery. With design, however, the optimization objective function is typically to maximize the sum of green bands on the artery by selecting the best cycle, splits and offsets solutions. Such solutions are usually achieved with PASSER II for normal arteries. Special applications for optimization of signal timing at frontage road arteries and diamond interchanges also are achieved by PASSER III. The characteristics, data requirements, performance measures and computer system requirements for these tools are summarized in Tables 3 and 4. Transportation Research Circular E-C014: Traffic Analysis Software Tools 11 HCS-Multilane The HCS-Multilane method is used for analyzing uninterrupted flow on rural and suburban artery highways, based on Chapter 7 of the HCM. Data required for multilane analysis include traffic and roadway conditions, such as hourly traffic volumes and peak hour factors, terrain type, number of lanes, grade, vehicle classification and composition, free-flow speed, median type, lateral clearance and number of access points per mile. The results of the analysis include service flow rate, free-flow speed, average passenger-car speed, density and LOS. The LOS is defined by the density of traffic. Download 284.29 Kb. Do'stlaringiz bilan baham: |
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