Publication

Analytical Modelling and Sensitivity Analysis for Travel Time Estimation on Signalised Urban Network

André-Gilles Dumont, Ashish Bhaskar, Edward Chung
2008
Conference Papers

Abstract

This paper presents a model for estimation of average travel time on signalized urban lane using cumulative plots. The plots are generated based on the availability of data: a) case-D, for detector data only; b) case-DS, for detector data and signal timings; and c) case-DSS, for detector data, signal timings and saturation flow rate. The performance of the model for different degrees of saturation and different detector detection intervals is consistent for case-DSS and case-DS whereas, for case-D the performance is inconsistent. The sensitivity analysis of the model for case-D indicates that it is sensitive to detection interval and signal timings within the interval. When detection interval is integral multiple of signal cycle then it has low accuracy and low reliability. Whereas, for detection interval around 1.5 times signal cycle both accuracy and reliability are high.

Official source

https://infoscience.epfl.ch/entities/publication/00bffe7b-a203-467f-9403-73a5a135e0a2

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André-Gilles Dumont, Ashish Bhaskar, Edward Chung
2008
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/00bffe7b-a203-467f-9403-73a5a135e0a2

About this result

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Q–Q plot

In statistics, a Q–Q plot (quantile-quantile plot) is a probability plot, a graphical method for comparing two probability distributions by plotting their quantiles against each other. A point (x, y) on the plot corresponds to one of the quantiles of the second distribution (y-coordinate) plotted against the same quantile of the first distribution (x-coordinate). This defines a parametric curve where the parameter is the index of the quantile interval.

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In classical deductive logic, a consistent theory is one that does not lead to a logical contradiction. The lack of contradiction can be defined in either semantic or syntactic terms. The semantic definition states that a theory is consistent if it has a model, i.e., there exists an interpretation under which all formulas in the theory are true. This is the sense used in traditional Aristotelian logic, although in contemporary mathematical logic the term satisfiable is used instead.

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