Safety indicators for microsimulation-based assessments
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Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/19427
Tipus de documentText en actes de congrés
Data publicació2003
EditorTRB
Condicions d'accésAccés obert
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continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
In the field of ITS applications evaluation, micro-simulation is becoming more and more a
useful and powerful tool. In the evaluation process, one of the most important steps is the
safety analysis. For that purpose, classical micro-simulation outputs give some helpful
information, but which aren’t sufficient for an accurate analysis in many cases. Nevertheless,
the microscopic level of traffic description offers the possibility of tracking the simulated
vehicles getting at each time step their relative position, speed and deceleration. This paper
explains how a safety indicator can be calculated with these different parameters. This safety
indicator is used in a ramp metering case study to illustrate the utility of such output for a
safety analysis. However, this indicator is limited to the linear collision probability and gives
therefore no information on crossing trajectories conflicts like in junctions. On the other hand
the likelihood of an incident to happen depends not only on traffic conditions but on the
influence of many other factors as for example the geometry of the road, the visibility or the
pavement conditions (wet, dry, etc.). When significant statistical information is available an
estimation of the probability of an incident to happen can be computed, and used in microsimulation
analysis. The paper is completed with the development and testing of hierarchical
logit based model to estimate this probability.
CitacióBarcelo, J. [et al.]. Safety indicators for microsimulation-based assessments. A: 82ND ANNUAL MEETING OF TRANSPORTATION RESEARCH BOARD. "TRANSPORTATION RESEARCH BOARD 82ND ANNUAL MEETING". Washington D.C.: TRB, 2003, p. 1-18.
Versió de l'editorhttp://cataleg.upc.edu/record=b1202918~S1*cat
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TRB2003-001125.pdf | 347,6Kb | Visualitza/Obre |