Proposal of an Alternative Model for Speed-Flow Relationship in Two-Lane Highways

Romana Garcia, Manuel and Núñez Fernández, Miguel (2011). Proposal of an Alternative Model for Speed-Flow Relationship in Two-Lane Highways. In: "6th International Symposium on Highway Capacity and Quality of Service", 28/06/2011 - 01/07/2011, Estocolmo, Suecia. pp. 832-839. https://doi.org/10.1016/j.sbspro.2011.04.502.

Description

Title: Proposal of an Alternative Model for Speed-Flow Relationship in Two-Lane Highways
Author/s:
  • Romana Garcia, Manuel
  • Núñez Fernández, Miguel
Item Type: Presentation at Congress or Conference (Article)
Event Title: 6th International Symposium on Highway Capacity and Quality of Service
Event Dates: 28/06/2011 - 01/07/2011
Event Location: Estocolmo, Suecia
Title of Book: Procedia - Social and Behavioral Sciences. 6th International Symposium on Highway Capacity and Quality of Service
Date: 2011
Volume: 16
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería Civil: Transportes [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A research has been carried out in two-lanehighways in the Madrid Region to propose an alternativemodel for the speed-flowrelationship using regular loop data. The model is different in shape and, in some cases, slopes with respect to the contents of Highway Capacity Manual (HCM). A model is proposed for a mountainous area road, something for which the HCM does not provide explicitly a solution. The problem of a mountain road with high flows to access a popular recreational area is discussed, and some solutions are proposed. Up to 7 one-way sections of two-lanehighways have been selected, aiming at covering a significant number of different characteristics, to verify the proposed method the different classes of highways on which the Manual classifies them. In order to enunciate the model and to verify the basic variables of these types of roads a high number of data have been used. The counts were collected in the same way that the Madrid Region Highway Agency performs their counts. A total of 1.471 hours have been collected, in periods of 5 minutes. The models have been verified by means of specific statistical test (R2, T-Student, Durbin-Watson, ANOVA, etc.) and with the diagnostics of the contrast of assumptions (normality, linearity, homoscedasticity and independence). The model proposed for this type of highways with base conditions, can explain the different behaviors as traffic volumes increase, and follows a polynomial multiple regression model of order 3, S shaped. As secondary results of this research, the levels of service and the capacities of this road have been measured with the 2000 HCM methodology, and the results discussed. © 2011 Published by Elsevier Ltd.

More information

Item ID: 13389
DC Identifier: http://oa.upm.es/13389/
OAI Identifier: oai:oa.upm.es:13389
DOI: 10.1016/j.sbspro.2011.04.502
Deposited by: Memoria Investigacion
Deposited on: 24 Oct 2012 09:02
Last Modified: 21 Apr 2016 12:42
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