01336872

Component

https://doi.org/10.3141/2257-03

http://scholar.google.com...ehey&publication_year=2011

The development of a procedure for predicting the average running time along an urban street segment is described. Running time is shown to be a function of free-flow speed, running speed, residual lost time at the upstream intersection, and the volume of vehicles turning from the traffic stream. The procedure includes models for estimating free-flow speed, running speed, and residual lost time. These models were calibrated with field data from many sites collectively located in several states. The model for estimating free-flow speed includes variables for speed limit, median type, access point density, curb presence, and number of lanes. An increase in access point density was found to correspond to a reduction in free-flow speed. The model for estimating running speed includes a variable for flow rate. The effect of flow rate on speed is similar to that found on highways, such that speed decreases with an increase in flow rate, especially at high flow rates. The procedure is recommended for inclusion in the chapter on urban streets segments in the 2010 edition of the Highway Capacity Manual.

01363031

11-0786

English

pp 22-30

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309222938

Print

Figures (6) ; References (13) ; Tables (5)

Calibration; Free flow speeds; Highway capacity; Mathematical prediction; Running speed; Running time; Streets; Traffic flow; Traffic flow rate; Traffic models; Traffic speed; Turning traffic

Highway Capacity Manual 2010

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Feb 17 2011 5:34PM

• Automobile-Oriented or Complete Street? Pedestrian and Bicycle Level of Service in the New Multimodal Paradigm
• Capacity of Multilane All-Way Stop-Controlled Intersections Based on the Conflict Technique
• Control Delay Calculation at Diverging Diamond Interchanges
• Cycle-by-Cycle Queue Length Estimation for Signalized Intersections Using Sampled Trajectory Data
• Decision Tree–Based Model for Estimation of Work Zone Capacity
• Developing Capacity Models for Local Roundabouts: Streamlined Process
• Development of Managed-Lane Access Guidelines Based on Gap Acceptance Theory
• Effect of Driver Cell Phone Use on Queue Discharge Patterns at Signalized Intersections
• Evaluating the Impacts of Unconventional Outside Left-Turn Lane Design on Traffic Operations at Signalized Intersections
• Impact of Inclement Weather on Left-Turn Gap Acceptance Behavior of Drivers
• Modeling Delay During Heavy Traffic for Signalized Intersections with Short Left-Turn Bays
• Right-Turn-on-Red Volume Estimation and Incremental Capacity Models for Shared Lanes at Signalized Intersections
• Speed–Flow Curves for Freeways in Highway Capacity Manual 2010