01049346

Component

https://doi.org/10.3141/2027-11

http://scholar.google.com...seng&publication_year=2007

Many models for the analysis of capacity and signal timing of signalized intersections are based on the assumption that queue discharge will quickly reach a steady maximum rate after the green interval begins. This assumption leads to a common practice of using saturation flow and lost time as parameters in modeling the requirements for lane capacity, intersection performance, and signal timing. However, recent field data indicate that the queue discharge rate may continue to increase long after green onset. For this type of queue discharge characteristic, the traditional applications of lost time and saturation flow may result in significant errors when lane capacity and modeling optimal cycle length are estimated. The extent of such errors is assessed on the basis of the queue discharge characteristics observed in 38 urban traffic lanes.

01089135

English

pp 85-90

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104548

Print

Figures (11) ; References (9) ; Tables (1)

Errors; Green interval (Traffic signal cycle); Highway capacity; Highway operations; Saturation flow; Signalized intersections; Traffic flow; Traffic lanes; Traffic queuing; Traffic signal timing

Field data; Queue discharge rate

Highways; Operations and Traffic Management; I71: Traffic Theory; I73: Traffic Control

TRIS, TRB, ATRI

Feb 8 2007 5:15PM

• Arrival-Based Uniform Delay Model for Exclusive Protected-Permitted Left-Turn Lane at Signalized Intersections
• Assessing the Impact of Turning Vehicles on Pedestrian Level of Service at Signalized Intersections: A New Perspective
• Driver Behavior Model of Saturation Flow
• Effect of Site and Population Characteristics on Freeway Bottleneck Capacity
• Estimating Truck Equivalencies for Freeway Sections
• Field Measurement of Approach Delay at Signalized Intersections Using Point Data
• Headway Acceptance Characteristics of U-Turning Vehicles at Unsignalized Intersections
• Implementing the Concept of Reliability for Highway Capacity Analysis
• Incorporation of Transportation User Perception into Evaluation of Service Quality of Signalized Intersections
• Probabilistic Analysis of "Highway Capacity Manual" Models: Case Study of a Signalized Intersection
• Relationship of Lane Width to Saturation Flow Rate on Urban and Suburban Signalized Intersection Approaches
• Total Approach Capacity at Signalized Intersections with Shared and Short Lanes: Generalized Model Based on a Simulation Study
• Travel Time Measurement Using Toll Infrastructure