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| Author(s): |
José Elievam Bessa Júnior
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Carlos. |
| Institution: | Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) |
| Defense date: | 2015-03-30 |
| Examining board members: |
José Reynaldo Anselmo Setti;
Manoel Mendonça de Castro Neto;
Maria Alice Prudêncio Jacques;
Felipe Issa Kabbach Junior;
Cira Souza Pitombo
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| Advisor: | José Reynaldo Anselmo Setti |
| Abstract | |
The Highway Capacity Manual 2010 uses Percent-Time-Spent Following (PTSF) and Average Travel Speed (ATS) to estimate level of service on two-lane rural highways. As it is almost impossible to observe PTSF directly in the field, the literature suggests alternative measures of effectiveness (MOEs) that can be obtained from traffic stream parameters. The objective of this thesis was to analyze MOEs that could adequately describe quality of service on two-lane rural highways in Brazil. Traffic data collected on several roads in the state of São Paulo were used to calibrate and validate the traffic simulation model CORSIM, using a Genetic Algorithm (GA). The recalibrated CORSIM was used to create a synthetic set of traffic data, comprising a wide range of traffic flows and road geometries. Using this synthetic data, several models relating PTSF to \"directly observable\" traffic parameters were developed: percent following (PF), as in the HCM2010; the shockwave theory model proposed by Pursula (1995); the Laval (2006) moving bottleneck model; the Polus and Cohen (2009) queueing model; and a polynomial model. PTSF estimates produced by these models significantly diverged from PTSF values produced by CORSIM, suggesting the need for a new measure of effectiveness. Thus, nine alternative MOEs were analyzed and models relating these MOEs to directional traffic flow were fitted, using the synthetic traffic data set. Comparisons between the values obtained from these models and from the field indicated that three MOEs (average travel speed of cars, density for cars and follower density) could be used to create level of service criteria for two-lane rural highways in Brazil. (AU) | |
| FAPESP's process: | 10/01809-0 - Measures of effectiveness for quality of service evaluation on two-lane rural highways in Brazil |
| Grantee: | José Elievam Bessa Júnior |
| Support Opportunities: | Scholarships in Brazil - Doctorate |