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Title:

Effects of Time of Day and Wet Pavement Condition on Two-Fluid Model

Accession Number:

01126655

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

The Two-Fluid model characterizes the relationship between running time per mile and travel time per mile. The parameters of the two-fluid model have been widely used to quantify the performance of urban networks. Historically, the two-fluid model has been developed utilizing the travel time data collected for the morning and evening peak hours, assuming that there does not exist significant differences in the two-fluid model trends between these two peak hours. The purpose of this study is to investigate the effect of time of day and wet pavement of the two-fluid model trends. Travel time per mile and stop time per mile data were collect for the Orlando downtown network during the morning, afternoon and evening peak. It was found that the two fluid trends were significantly different between the morning peak and evening peak. No significant difference was observed in the two-fluid model trends between the evening and midday peaks. Significant differences were also observed in the two-fluid model under wet and dry conditions. These results indicate that drivers interact differently with other vehicles and other network elements depending on the time of day and wet pavement conditions. These findings suggest that there is a need to evaluate the two-fluid model for the network separately based on time of day. This modeling technique would be particularly useful in evaluating quality of traffic in cities with large number of modes of travel (mixed traffic, and shared lanes). The two-fluid model allows for a holistic evaluation of a transportation network.

Monograph Accession #:

01120148

Report/Paper Numbers:

09-1826

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Dixit, Vinayak V
Radwan, Essam

Pagination:

12p

Publication Date:

2009

Conference:

Transportation Research Board 88th Annual Meeting

Location: Washington DC, United States
Date: 2009-1-11 to 2009-1-15
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures; Maps; References (14) ; Tables (3)

Geographic Terms:

Orlando (Florida)

Subject Areas:

Highways; Operations and Traffic Management; I72: Traffic and Transport Planning

Source Data:

Transportation Research Board Annual Meeting 2009 Paper #09-1826

Files:

TRIS, TRB

Created Date:

Jan 30 2009 6:05PM