01049599

Component

https://doi.org/10.3141/2027-01

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

A stochastic concept for highway capacity analysis is presented. The capacity of a highway facility is regarded as a random variable instead of a constant value. Thus, the stochastic approach provides new measures of traffic flow performance based on aspects of traffic reliability. A method for the estimation of capacity distribution functions from empirical data based on statistical methods for lifetime data analysis is introduced. This method is derived for the analysis of freeway capacity. However, the stochastic approach also is shown to be applicable to intersections. Results of the analysis of data samples from freeway sections in Germany indicate that freeway capacity is Weibull-distributed with a considerable variance. A Monte Carlo technique based on the stochastic description of capacity is proposed to quantify freeway traffic performance over a whole year. This technique also provides a quantitative assessment for oversaturated conditions.

01089135

English

pp 1-8

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104548

Print

Figures (7) ; References (24) ; Tables (1)

Freeway operations; Freeways; Highway capacity; Implementation; Monte Carlo method; Random variables; Stochastic processes; Traffic flow; Traffic oversaturation; Weibull distributions

Reliability based evaluation

Germany

Data and Information Technology; Highways; Operations and Traffic Management; Research; I71: Traffic Theory

TRIS, TRB, ATRI

Feb 8 2007 7:40PM

• 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
• Errors in Analyses for Capacity and Timing Design of Signalized Intersections in Absence of Steady Queue Discharge Rates
• 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
• 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