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Title:

Speed–Flow Curves for Freeways in Highway Capacity Manual 2010

Accession Number:

01336835

Record Type:

Component

Availability:

Transportation Research Board Business Office

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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/166654.aspx

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Order URL: http://worldcat.org/isbn/9780309222938

Abstract:

Since the 1965 edition of the Highway Capacity Manual (HCM), fundamental curves representing the relationship between speed and volume or flow rate have formed the basis of design and analysis methodologies for basic freeway segments and for uninterrupted flow segments of multilane highways. As the 2010 edition of the HCM was being developed, a new set of freeway speed–flow curves was recommended. Somewhat late in the development process, the recommended curves became controversial. This paper presents the recommended curves and the research behind them and the controversies that affected the outcome. A final set of curves for HCM 2010 was recommended on the basis of extensive comparative statistical analyses of a substantial database and on several conditions that the TRB Highway Capacity and Quality of Service Committee voted to impose on the curves characteristics. Recommendations for the future are made.

Monograph Accession #:

01363031

Report/Paper Numbers:

11-0543

Language:

English

Authors:

Roess, Roger P

Pagination:

pp 10-21

Publication Date:

2011

Serial:

Transportation Research Record: Journal of the Transportation Research Board

Issue Number: 2257
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

9780309222938

Media Type:

Print

Features:

Figures (7) ; References (3) ; Tables (6)

Identifier Terms:

Uncontrolled Terms:

Subject Areas:

Highways; Operations and Traffic Management; I73: Traffic Control

Files:

TRIS, TRB, ATRI

Created Date:

Feb 17 2011 5:29PM

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