Reference
A. Jamshidnejad and B. De Schutter, "Estimation of the generalized average
traffic speed based on microscopic measurements,"
Transportmetrica A: Transport Science, vol. 11, no. 6, pp.
525-546, 2015.
Abstract
The average speed of vehicles plays an important role in traffic engineering.
In almost any model-based traffic monitoring, analysis, or control application
the average speed is required as a measure of performance or as an input for
traffic models used to simulate fuel consumption, vehicle emissions, or traffic
noise. The average speed is also used in algorithms that estimate the travel
time. It also appears in the fundamental equation of traffic where density is
calculated based on the average speed and flow. This article presents a new
methodology for estimating the time-space-mean speed (TSMS), which is an
equivalent for the
generalized speed introduced by
Edie in the paper "Discussion of traffic stream measurements and definitions"
(
Proceedings of the 2nd International Symposium on the Theory
of Traffic Flow, Paris, France, pp. 139-154, 1963). To this aim, first
tight upper and lower bounds are developed for the TSMS using individual
vehicle speeds that are obtained via point measurements. To estimate the TSMS
from these bounds, and to deal with the cases where the trajectories of the
vehicles might not be straight lines, a convex combination of the upper and
lower bounds is introduced. In order to assess the convex combination and to
compare its performance with other formulas in literature, two real-life data
sets corresponding to the NGSIM data for the I-880 highway in the San Francisco
Bay Area, and the A13 data near Rotterdam-Delft are used. At the end, MATLAB
simulations are presented to cover scenarios that are not included in the
available real-life data sets. The results produced by the new formula, both
for the real-life data sets and for MATLAB simulations, are found to be more
accurate compared with other available formulas in literature.
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BibTeX
@article{JamDeS:15-005,
author = {Jamshidnejad, Anahita and De Schutter, Bart},
title = {Estimation of the Generalized Average Traffic Speed Based on
Microscopic Measurements},
journal = {Transportmetrica A: Transport Science},
volume = {11},
number = {6},
pages = {525--546},
year = {2015}
}