Author: Clay Palmer McBrienPublisher:
ISBN:
Category : Roads
Languages : en
Pages : 280
Book Description
Evaluation of Factors Affecting Signalized Intersection Capacity
Author: Clay Palmer McBrienPublisher:
ISBN:
Category : Roads
Languages : en
Pages : 280
Book Description
An Evaluation of Signalized Intersection Capacity Methods
Author: Gary S. SpringPublisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 126
Book Description
Signalized Intersection Capacity Data Collection
Author: Capacity of Signalized Intersections
Author: Eugene F. ReillyPublisher:
ISBN:
Category : Roads
Languages : en
Pages : 80
Book Description
Some Factors Affecting the Capacity of a Series of Signalized Intersections
Author: Rodney James VaughanPublisher:
ISBN: 9780725901691
Category : Roads
Languages : en
Pages : 18
Book Description
Notes on Signalized Intersection Capacity Calculations
Author: Carl H. ButtkePublisher:
ISBN:
Category : Highway capacity
Languages : en
Pages : 42
Book Description
Review and Evaluation of Methods for Analyzing Capacity at Signalized Intersections
Author: E. D. ArnoldPublisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 40
Book Description
VDOT's current policy is to use and accept from others the 1994 Highway Capacity Manual (HCM) as the basis for capacity analysis on Virginia's streets and highways. VDOT uses the latest version of the Highway Capacity Software (HCS). Software programs replicating the 1994 HCM may be used by others submitting work to VDOT for review; however, all input data and assumptions must be provided, and VDOT may use the HCS to check the submitted analysis. The analysis may be rejected if different results are obtained. To recommend appropriate revisions to this policy, this study evaluated computer software other than HCS that can be used in the analysis of signalized intersections, determining which programs provide acceptable results. The study then evaluated the results from simulation models to determine when and how to use this output in the analysis of signalized intersections. The study recommended that, in addition to HCS, VDOT use and accept from others SIGNAL94 and HCM/Cinema, or TRAF/NETSIM for capacity analysis at isolated intersections. CINCH, however, should not be used or accepted. For congested, oversaturated intersections, TRAF/NETSIM should be the preferred analysis type. Estimates of queue length at isolated signalized intersections should be derived from SIGNAL94, HCM/Cinema, or TRAF/NETSIM. For non-isolated intersections where queuing and spillback are a potential problem, simulation analysis with TRAF/NETSIM should be used instead of capacity analysis to determine the operational characteristics of the corridor.
Effects of U-turns on Capacity at Signalized Intersections and Simulation of U-turning Movement by Synchro
Author: Xiaodong WangPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
ABSTRACT: The primary objective of this study is to evaluate the operational effects of U-turn movement at signalized intersections. More specifically, the research objectives include the following parts: To identify the factors affecting the operational performance of U-turning vehicles. In this case, we are particularly interested in the U-turn speeds of U-turning vehicles; To evaluate the impacts of U-turns on capacity of signalized intersections, and; To simulate U-turn movement at signalized intersections using Synchro and validate the simulation results. To achieve the research objectives, extensive field data collection work was conducted at sixteen selected sites at Tampa Bay area of Florida. The data collected in the field include: U-turning speed; Left turning speed; Turning radius Queue discharge time; Control delay; Hourly traffic volume, and; Percentage of U- turning vehicles in left turn lane. Based on the collected field data, a linear regression model was developed to identify the factors affecting the turning speeds of U-turning vehicles at signalized intersections. The model shows the turning speed is significantly impacted by the turning radius and the speed of U-turning vehicles increases with the increase of turning radius. On the basis of field data field data collection, a regression model was developed to estimate the relationship between the average queue discharge time for each turning vehicle and the various percentages of U-turning vehicles in the left turn traffic stream. Adjustment factors for various percentages of U-turning vehicles were also developed by using the regression model. The adjustment factors developed in this study can be directly used to estimate the capacity reduction due to the presence of various percentages of U-turning vehicles at a signalized intersection. The developed adjustment factors were used to improve the simulation of U-turn movement at signalized intersection by using Synchro. The simulation model was calibrated and validated by field data. It was found that using the developed adjustment factors will greatly improve the accuracy of the simulation results for U-turn movement.
Evaluation of Safety Strategies at Signalized Intersections
Author: Raghavan SrinivasanPublisher: Transportation Research Board
ISBN: 0309213452
Category : Technology & Engineering
Languages : en
Pages : 48
Book Description
TRB’s National Cooperative Highway Research Program (NCHRP) Report 705: Evaluation of Safety Strategies at Signalized Intersections explores crash modification factors (CMFs) for safety strategies at signalized intersections. CMFs are a tool for quickly estimating the impact of safety improvements.
Determining the Capacity Benefits of Real-time Signal Control at Intersections
Author: Alexander SkabardonisPublisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 30
Book Description