01015544

Component

https://doi.org/10.3141/1920-08

http://scholar.google.com...nter&publication_year=2005

The "Manual on Uniform Traffic Control Devices" (MUTCD) contains the national standard for installing and maintaining traffic control devices on all streets and highways. The 2003 MUTCD contains numerous corrections, revisions, and updates to the millennium edition (2000). One update is related to the definition of crossing distance at signalized intersections, where the crossing distance is extended to the far-side curb rather than the center of the farthest traffic lane. This study investigated the sensitivity of intersection performance to crossing distance and walking speed, critical constraints in the determination of the minimum green time. Three crossing distance standards and four walking speeds are considered. With Highway Capacity Manual (HCM) procedures, the impacts of the given crossing distance definitions and walking speeds on intersection operations were tested on two intersection configurations over a range of cycle lengths and traffic volumes. The effect on intersection performance was found to be most significant at low cycle lengths, in some instances with the delay increased manyfold. However, when cycle lengths were increased to account for the pedestrian constraints, optimal delay rarely increased by more than a few seconds. Additionally, as the discrepancy between the critical lane traffic volume on the main and cross streets was increased, the impact of pedestrian green times on vehicle delay also increased. It was seen that as the cycle length increased, pedestrian minimum green times no longer governed, so the impact of pedestrians on intersection performance became increasingly insignificant, often with a minimal impact on the optimal performance.

01015530

English

pp 65-73

2005

Transportation Research Record: Journal of the Transportation Research Board

0309093937

Print

Figures (5) ; References (13) ; Tables (3)

Green interval (Traffic signal cycle); Pedestrians; Performance; Sensitivity analysis; Signalized intersections; Traffic delays

Highway Capacity Manual; Manual on Uniform Traffic Control Devices

Crossing distance (Intersections); Walking speed

Highways; Operations and Traffic Management; Pedestrians and Bicyclists; I73: Traffic Control

TRIS, TRB, ATRI

Jan 17 2006 11:39AM

• Arrival-Based Uniform Delay Model for Oversaturated Signalized Intersections with Poor Progression
• Calibrating and Validating Deterministic Traffic Models: Application to "Highway Capacity Manual" Control Delay at Signalized Intersections
• Capacity at Intersections Without Traffic Signals
• Comparison of Methods for Sensitivity and Uncertainty Analysis of Signalized Intersections Analyzed with the "Highway Capacity Manual"
• Driver Assessment of Service Quality on Urban Streets
• Effect of Lane Width on Speeds of Cars and Heavy Vehicles in Work Zones
• Effects of Parameter Distributions and Correlations on Uncertainty Analysis of "Highway Capacity Manual" Delay Model for Signalized Intersections
• Effects of U-Turns on Capacities of Signalized Intersections
• Headway Compression During Queue Discharge at Signalized Intersections
• Interchange Critical Movement Analysis for Planning and Preliminary Design Applications
• Methodology for Evaluating the Operational Performance of Interchange Ramp Terminals
• Modeling of Delay Induced by Downstream Traffic Disturbances at Signalized Intersections
• Variability of Peak Hour Factor at Intersections
• Video Simulation of Pedestrian Crossings at Signalized Intersections