Ecological User Equilibrium in Traffic Management (TM)?. Behrisch, M., Flötteröd, Y., Krajzewicz, D., & Wagner, P. Februar 2012. Der Eintrag wurde auf der DTA 2012 vorgestellt.![Ecological User Equilibrium in Traffic Management (TM)? [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper abstract bibtex 7 downloads With increasing environmental sustainability awareness significant attention on ecological traffic management (eco-TM) has come into the focus of researchers and practitioners. While different approaches have been applied to reach minimal pollutant production, the classic user equilibrium calculation with the pollutant production as travel costs instead of using travel times remains in the center of attention. However, the validity of such a direct transformation to find a user equilibrium is questionable. In this paper, a simplified analytical approach to examine the above aforementioned validity has been carried out, followed by a simulation approach to verify the results of the analytical approach. The result shows that the pollutant production function violates the usual assumption of a monotonous function (typically, emission has a minimum at travel speeds around 60 km/h). It also indicates that the respective algorithms to compute the user equilibrium must deal with the fact, that the equilibrium solution is not unique and is dependent on the initial solution. This means that substantial modifications to the algorithms that compute the user equilibrium have to be discussed since they do not work as intended when pollutant production is used as travel costs, especially in a transportation system with mixed speeds that cover a range around the minimum emission speed.
@unpublished{dlr76186,
author = {Michael Behrisch and Yun-Pang Fl\"otter\"od and Daniel Krajzewicz and Peter Wagner},
note = {Der Eintrag wurde auf der DTA 2012 vorgestellt.},
title = {Ecological User Equilibrium in Traffic Management (TM)?},
month = {Februar},
year = {2012},
abstract = {With increasing environmental sustainability awareness significant
attention on ecological traffic management (eco-TM) has come into
the focus of researchers and practitioners. While different approaches
have been applied to reach minimal pollutant production, the classic
user equilibrium calculation with the pollutant production as travel
costs instead of using travel times remains in the center of attention.
However, the validity of such a direct transformation to find a user
equilibrium is questionable. In this paper, a simplified analytical
approach to examine the above aforementioned validity has been carried
out, followed by a simulation approach to verify the results of the
analytical approach. The result shows that the pollutant production
function violates the usual assumption of a monotonous function (typically,
emission has a minimum at travel speeds around 60 km/h). It also
indicates that the respective algorithms to compute the user equilibrium
must deal with the fact, that the equilibrium solution is not unique
and is dependent on the initial solution. This means that substantial
modifications to the algorithms that compute the user equilibrium
have to be discussed since they do not work as intended when pollutant
production is used as travel costs, especially in a transportation
system with mixed speeds that cover a range around the minimum emission
speed.},
groups = {pollution},
institution = {Institut f\"ur Verkehrssystemtechnik},
keywords = {ecological traffic management, traffic simulation, user equilibrium},
owner = {dkrajzew},
timestamp = {2012.09.18},
url = {http://elib.dlr.de/76186/}
}
Downloads: 7
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While different approaches\n\thave been applied to reach minimal pollutant production, the classic\n\tuser equilibrium calculation with the pollutant production as travel\n\tcosts instead of using travel times remains in the center of attention.\n\tHowever, the validity of such a direct transformation to find a user\n\tequilibrium is questionable. In this paper, a simplified analytical\n\tapproach to examine the above aforementioned validity has been carried\n\tout, followed by a simulation approach to verify the results of the\n\tanalytical approach. The result shows that the pollutant production\n\tfunction violates the usual assumption of a monotonous function (typically,\n\temission has a minimum at travel speeds around 60 km/h). It also\n\tindicates that the respective algorithms to compute the user equilibrium\n\tmust deal with the fact, that the equilibrium solution is not unique\n\tand is dependent on the initial solution. 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