Temat: traffic assignment - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Spatial Distribution of Flows in Transportation Networks. A Model Based on Bounded Rationality Assumption
Autorzy:: Dorosiewicz, Sławomir
Tematy:: transportation networks
dynamic traffic assignment problem model of traffic flows; Pokaż więcej
Wydawca:: Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Powiązania:: https://bibliotekanauki.pl/articles/504417.pdf Link otwiera się w nowym oknie
Opis:: This paper refers to a Dynamic Traffic Assignment Problem. A consecutive dynamic model of traffic flows is formulated. Some of its dynamical properties (including existence of chaotic solutions and bifurcations) are examined in two special cases.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Flow-capture location model with link capacity constraint over a mixed traffic network
Autorzy:: Liu, Ping
Cao, Jinde
Luo, Yiping
Guo, Jianhua
Huang, Wei
Tematy:: traffic assignment problem
link capacity constraint
charging location
pathmdistance constraint; Pokaż więcej
Wydawca:: Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Powiązania:: https://bibliotekanauki.pl/articles/2147143.pdf Link otwiera się w nowym oknie
Opis:: This paper constructs and settles a charging facility location problem with the link capacity constraint over a mixed traffic network. The reason for studying this problem is that link capacity constraint is mostly insufficient or missing in the studies of traditional user equilibrium models, thereby resulting in the ambiguous of the definition of road traffic network status. Adding capacity constraints to the road network is a compromise to enhance the reality of the traditional equilibrium model. In this paper, we provide a two-layer model for evaluating the efficiency of the charging facilities under the condition of considering the link capacity constraint. The upper level model in the proposed bi-level model is a nonlinear integer programming formulation, which aims to maximize the captured link flows of the battery electric vehicles. Moreover, the lower level model is a typical traffic equilibrium assignment model except that it contains the link capacity constraint and driving distance constraint of the electric vehicles over the mixed road network. Based on the Frank-Wolfe algorithm, a modified algorithm framework is adopted for solving the constructed problem, and finally, a numerical example is presented to verify the proposed model and solution algorithm.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: RouteRL: Multi-agent reinforcement learning framework for urban route choice with autonomous vehicles
Autorzy:: Kucharski, Rafał
Psarou, Anastasia
Varga, Zoltán
Gorczyca, Łukasz
Akman, Ahmet Onur
Jamróz, Grzegorz
Opis:: RouteRL is a novel framework that integrates multi-agent reinforcement learning (MARL) with a microscopic traffic simulation for the development of efficient collective route choice strategies for autonomous vehicles (AVs). The proposed framework models the daily urban route choices of driver agents of two types: human drivers, emulated using behavioral route choice models, and AVs, modeled as MARL agents optimizing their policies for a predefined objective. RouteRL aims to advance research in MARL, transport modeling, and human–AI interaction for transportation applications. This study presents a technical report on RouteRL, outlines its potential research contributions, and showcases its impact via illustrative examples. Initial findings show that human travel times could increase following the introduction of AVs in urban environments, highlighting the importance of future studies to support efficient urban mobility.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 4.

Tytuł:: Potoki w sieciach transportowych. Rozkład przestrzenny i jego własności dynamiczne
Flows in transportation networks. Spatial distribution and its dynamic properties
Autorzy:: Dorosiewicz, Sławomir
Tematy:: zagadnienie przydziału ruchu
ograniczona racjonalność
układy dynamiczne
traffic assignment
bounded rationality
dynamical systems; Pokaż więcej
Wydawca:: Główny Urząd Statystyczny
Powiązania:: https://bibliotekanauki.pl/articles/422651.pdf Link otwiera się w nowym oknie
Opis:: Praca dotyczy zagadnienia przydziału ruchu. Sformułowano dynamiczny model opisujący prze-strzenny rozkład potoków w sieci transportowej. Zbadane zostały własności dynamiczne tego modelu w kilku przypadkach szczególnych.
This paper refers to Dynamic Traffic Assignment Problem. A consecutive dynamic model of traf-fic flows is formulated. Some of its dynamical properties (including existence of chaotic solutions and bifurcations) are examined in special cases.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: How does the value of time influence road user costs during work zone closures? A case study in El Paso, Texas, using simulation - based modeling methods
Autorzy:: Shelton, Jeffrey
Martin, Peter M.
Tematy:: value of time
work zone
road user cost
dynamic traffic assignment
advanced traveler information; Pokaż więcej
Wydawca:: Fundacja Centrum Badań Socjologicznych
Powiązania:: https://bibliotekanauki.pl/articles/2141120.pdf Link otwiera się w nowym oknie
Opis:: It is becoming standard practice for many departments of transportation (DOTs) to use incentive/disincentive clauses (also known as road user costs) with contractors to stay on or ahead of schedule. These road user costs are clauses that DOTs use to calculate a monetary amount to encourage contractors to complete work prior to milestone dates and/or limit the time specified on the contract. The monetary amounts are typically vehicle operating costs and vehicle delay costs encumbered by highway users resulting from construction, maintenance, or rehabilitation activity. In this paper, we propose an innovative way of calculating these costs using varied values of time based on trip purpose and departure time. In addition, we use advanced pre-trip and en route traveler information to determine the influence it has on route choice. Several scenarios are modeled using an advanced, simulation-based dynamic traffic assignment model. The goal of this paper is to identify the governing factors that contribute to road use costs by determining different approaches to derive the value one places on a trip. The approach to this study is twofold: first several research methods were used to derive the value of time. Second, the use of advanced traveler information is introduced to determine if it plays a critical role in route choice. The proposed methodology shows differences in road user cost calculations. Which approach would be more receptive to a contractor while proposing roadway construction? A case study of a roadway construction project in El Paso, Texas, is used to compare different approaches to calculate road user costs.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Kalibracja więźby ruchu na podstawie pomiarów przekrojowych
Calibration of matrix using traffic counts
Autorzy:: Szarata, A.
Tematy:: więźba ruchu
rozkład ruchu w sieci
zbiory rozmyte
OD matrix
traffic assignment
fuzzy sets; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Powiązania:: https://bibliotekanauki.pl/articles/193160.pdf Link otwiera się w nowym oknie
Opis:: Założenia estymacji więźby ruchu przy wykorzystaniu pomiarów przekrojowych. Problematyka korekty elementów więźby ruchu. Przyktad zastosowania procedury kalibracji więźby ruchu.
Assumptions of estimation of changes in O-D matrix using traffic counts. Problems of traffic measurement to estimation of changes in O-D matrix An example of application of methodology of the O-D matrix calibration.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: A robust algorithm to solve the signal setting problem considering different traffic assignment approaches
Autorzy:: Adacher, L.
Gemma, A.
Tematy:: genetic algorithm
surrogate method
traffic signal synchronization
traffic assignment
simulation model
algorytm genetyczny
metoda zastępcza
synchronizacja sygnału ruchu
model symulacji; Pokaż więcej
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Powiązania:: https://bibliotekanauki.pl/articles/330229.pdf Link otwiera się w nowym oknie
Opis:: In this paper we extend a stochastic discrete optimization algorithm so as to tackle the signal setting problem. Signalized junctions represent critical points of an urban transportation network, and the efficiency of their traffic signal setting influences the overall network performance. Since road congestion usually takes place at or close to junction areas, an improvement in signal settings contributes to improving travel times, drivers’ comfort, fuel consumption efficiency, pollution and safety. In a traffic network, the signal control strategy affects the travel time on the roads and influences drivers’ route choice behavior. The paper presents an algorithm for signal setting optimization of signalized junctions in a congested road network. The objective function used in this work is a weighted sum of delays caused by the signalized intersections. We propose an iterative procedure to solve the problem by alternately updating signal settings based on fixed flows and traffic assignment based on fixed signal settings. To show the robustness of our method, we consider two different assignment methods: one based on user equilibrium assignment, well established in the literature as well as in practice, and the other based on a platoon simulation model with vehicular flow propagation and spill-back. Our optimization algorithm is also compared with others well known in the literature for this problem. The surrogate method (SM), particle swarm optimization (PSO) and the genetic algorithm (GA) are compared for a combined problem of global optimization of signal settings and traffic assignment (GOSSTA). Numerical experiments on a real test network are reported.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Predicted congestions never occur. On the gap between transport modelling and human behaviour
Autorzy:: Frey, H.
Leth, U.
Mayerthaler, A.
Brezina, T.
Tematy:: model transportu
ustalenie ruchu
postępowanie człowieka
przekrwienie
Euro 2008
transport model
traffic assignment
human behaviour
congestion
EURO 2008; Pokaż więcej
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Powiązania:: https://bibliotekanauki.pl/articles/375206.pdf Link otwiera się w nowym oknie
Opis:: This paper presents an introduction to meso-scale transport modeling and issues of human behaviour in transport systems. Along with other examples of the human ability to learn in transport systems we look at the comparison of real life data and the prediction of modeling tools for the closure of Vienna’s inner ring road during the 2008 European Football Championship (EURO 2008). Some light is shed on the scientific question, whether currently used modeling tools are able to adequately reproduce the real-life behaviour of human beings in the transport system and should be used for transport policy decision making.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Direct observation of rerouting phenomena in traffic networks
Autorzy:: Kucharski, R.
Gentile, G.
Tematy:: dynamic traffic assignment
rerouting phenomena
route choice models
information comply model
dynamiczna alokacja ruchu
przekierowania
modele wyboru drogi
wybór trasy; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/223498.pdf Link otwiera się w nowym oknie
Opis:: In this paper we propose how available dataset can be used to estimate rerouting phenomena in traffic networks. We show how to look at set of paths observed during unexpected events to understand the rerouting phenomena. We use the information comply model [1] and propose its estimation method. We propose the likelihood formula and show how the theoretical and observed rerouting probabilities can be obtained. We conclude with illustrative example showing how a single observed path can be processes and what information it provides. Contrary to parallel paper [2] where rerouting phenomena is estimated using real traffic flow measures from Warsaw, here we use only synthetic data. The paper is organized as follows. First we elaborate on rerouting phenomena and define the traffic network, then we summarize the literature behind rerouting phenomena. We follow with a synthetic definition of dynamic traffic assignment needed to introduce ICM model in subsequent section. Based on that introduction we define the observations and propose estimation method based on them followed by illustrative example. Paper is summarized with conclusions and pointing of future directions.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: ITS: Intelligent Transportation Systems - multi-criteria control problems
ITS: Inteligentne Systemy Transportowe - problemy sterowania wielokryterialnego
Autorzy:: Adamski, A.
Florek, K.
Tematy:: systemy ITS
wielokryterialne sterowanie
wielowarstwowe struktury
przydziały ruchu w sieci
ITS systems
multi-criteria control
multi-layer system structures
traffic assignment in networks; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:: https://bibliotekanauki.pl/articles/282158.pdf Link otwiera się w nowym oknie
Opis:: The ITS systems offers high capabilities for the implementation of advanced multi-criteria traffic control methods. The crucial problems in this area are related with adeąuate flexibility of control actions to the estimated and predicted traffic demand. Very illustrative examples in this area are demand-supply behavioral interactions visible in the operation of an urban network where network link flows are a result of such interactions. The ITS systems offering dedicated services like VMS (Variable Message Signs), v-v/v-i (vehicle to vehicle/vehicle to infrastructure) communication, RGS (Route Guidance Systems) which can influence the network users behavioral patterns but the level of these influences is to a high degree uncertain. The representative set of traffic flows are crucial inputs for area-wide traffic coordination and control problems. In the paper the proposal of real-time recognition of behavioral patterns on different layers of HITS (Hierarchical Integrated multi-layer Transportation System) system is presented especially in the context of intelligent multi-criteria users-oriented traffic control actions to be a reaction on recognized users behavioral and estimation of these behavioral patterns. The advantages of the proposed approach are illustrated by examples of real-time solutions and comparisons with the existing off-line intuitive solutions.
Inteligentne Systemy Transportowe oferują znaczne możliwości implementacji zaawansowanych wielokryterialnych systemów sterowania ruchem drogowym. Podstawowe problemy w tym obszarze związane są z odpowiednią elastycznością sterowania w reakcji na szacowany i przewidywany popyt. ITS oferujące usługi, takie jak: znaki zmiennej treści, komunikacja między pojazdami oraz infrastrukturą drogową, a także systemy wyznaczania tras, wpływają na wzorce zachowań użytkowników sieci drogowej, jednak wpływ ten jest trudny do oszacowania. Z kolei dane dotyczące natężeń ruchu są podstawowe dla problemów optymalnego sterowania i koordynacji obszarowej. W pracy przedstawiono propozycję systemu rozpoznawania wzorców zachowań na różnych poziomach Hierarchicznego Zintegrowanego Systemu Transportowego (HITS), które stanowią podstawę działania inteligentnego wielokryterialnego sterowania ruchem. Zalety proponowanej metody zilustrowano rzeczywistymi przykładami.
Dostawca treści:: Biblioteka Nauki

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