Reference
A. Jamshidnejad and B. De Schutter, "An iterative procedure for estimating the
generalized average speed using microscopic point measurements,"
Proceedings of the 2015 International Conference on Models and
Technologies for Intelligent Transportation Systems (MT-ITS), Budapest,
Hungary, pp. 38-44, June 2015.
Abstract
Various traffic applications including model-based analysis and control of
traffic need the average speed. The average speed is used as a measure of
performance, and as an input for traffic models. It is also used to obtain the
density from a known flow or vice versa. In this paper, a new iterative
procedure is presented that uses point measurements from inductive loop
detectors for estimating the time-space-mean speed (TSMS), which is an
equivalent for the generalized average speed introduced by Edie (1965). An
important subject that is missing in the literature considering estimation of
the average speed is how to handle the vehicles that remain on a given road
section, i.e., a part of the road that is extended between two consecutive loop
detectors, for more than one sampling cycle. The problem occurs for the
vehicles that are still in the road section at the end of the cycle. These
vehicles are detected by the upstream loop detector once they enter the road
section. However, in future cycles the data of these vehicles will not be
considered by the loop detector. The iterative approach of the new procedure
makes it possible to adequately take into account the vehicles that will stay
on the same road section for several sampling cycles when estimating the TSMS.
To evaluate the new procedure, the NGSIM data, which provides detailed
information of a collection of vehicle trajectories on the I-880 highway in the
San Francisco Bay Area is utilized. The simulation results illustrate the
excellent performance of the iterative procedure for estimating the TSMS
compared with previous approaches.
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BibTeX
@inproceedings{JamDeS:15-035,
author = {Jamshidnejad, Anahita and De Schutter, Bart},
title = {An Iterative Procedure for Estimating the Generalized Average
Speed Using Microscopic Point Measurements},
booktitle = {Proceedings of the 2015 International Conference on Models and
Technologies for Intelligent Transportation Systems (MT-ITS)},
address = {Budapest, Hungary},
pages = {38--44},
month = jun,
year = {2015}
}