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Multi-region control for urban road networks using adaptive optimization
(2015)In this paper we present a control scheme for heterogeneous transportation networks which is based on the concept of the Macroscopic Fundamental Diagram (MFD) integrated with an adaptive optimization technique. The heterogeneous transportation network is first partitioned into a number of regions with homogeneous traffic conditions and well-defined MFDs. An appropriate clustering algorithm that consumes traffic information is applied for ...Conference Paper -
Advanced traffic control strategies and their potential application in Greece
(2006)Proceedings of the 3rd International Congress on Transportation ResearchConference Paper -
Modeling and integrated control of macroscopic heterogeneous traffic flow in large scale urban network using coloured Petri net
(2019)2019 TRB Annual Meeting OnlineThe evaluation of perimeter control using Macroscopic Fundamental Diagram (MFD) concept is strongly related with the quality of the corresponding dynamic models. For capturing the real characteristics of traffic dynamics, an enhanced accumulation-based traffic model is proposed in which transfer flow, boundary queues and travel delay are considered simultaneously using coloured Petri net. Taking the advantage of graphical structure, the ...Conference Paper -
An optimization framework for exclusive bus lane allocation in large networks with dynamic congestion
(2019)Road space distribution among multiple modes of transport in urban networks has attracted the interest of several researchers and policy planners. Traditionally, these problems are solved by ignoring operational and dynamic characteristics of multi-modal congestion due to the computational burden involved. Revealing the relation between road space share and global performance of the network can lead to more efficient transport system ...Conference Paper -
Optimal allocation of designated bus lanes in multi-modal urban networks
(2018)Road space distribution among multiple modes of transport in contemporary urban environments has attracted the interest of several researchers and policy planners. Revealing the relation between road space share and global performance of the network would result in more efficient transport system design. The introduction of dedicated bus lanes in parts of the network has been proposed as a measure to allow high occupancy vehicles to travel ...Conference Paper -
Real-time estimation of critical values of the macroscopic fundamental diagram for maximum network throughput
(2015)TRB 94th Annual Meeting Compendium of PapersPerimeter flow control or gating has recently been found to be a practical and efficient control scheme in mitigating traffic congestion in urban road networks. This control scheme aims at stabilising the accumulation of vehicles (or a proxy of accumulation, e.g. average occupancy or density) of the macroscopic or network fundamental diagram near critical accumulation to achieve maximum network throughput. Nevertheless, the maximum ...Conference Paper -
A real-time state estimation approach for multi-region MFD traffic systems based on extended Kalman filter
(2019)2019 TRB Annual Meeting OnlineThe problem of traffic state estimation for large-scale urban networks is studied. Given a network that is partitioned in a number of regions, the aggregated traffic dynamics describe the vehicle accumulation in each region as well as the transfer flows among neighbouring regions. Considering the fact that many such models have been extensively used for control in the literature recently, this work tackles the real-time estimation problem ...Conference Paper -
Linear-parameter-varying approximation of nonlinear dynamics for model predictive flow control of urban multi-region systems
(2020)2019 IEEE 58th Conference on Decision and Control (CDC)An alternative approach for real-time network- wide traffic control in cities that has recently gained a lot of interest is perimeter flow control. The focus of the current work is to study two aspects that are not covered in the perimeter control literature, which are: (a) integration of appropriate external demand information that has been considered sys- tem disturbance in the derivation of feedback control laws in previous works, and ...Conference Paper -
A rolling-horizon quadratic-programming approach to the signal control problem in large-scale congested urban road networks
(2008)Proceedings of 10th International Conference on Applications of Advanced Technologies in Transportation 2008The paper investigates the efficiency of a new signal control methodology, which offers a computationally feasible technique for real-time network-wide signal control in large- scale urban traffic networks and is applicable also under congested traffic conditions. In this methodology, the traffic flow process is modeled by use of the so-called store-and-forward modeling paradigm. The overall problem of network-wide signal control is ...Conference Paper -
Dynamic modeling of trip completion rate in urban areas with MFD representations
(2018)2018 TRB Annual Meeting OnlineA large part of the research utilizing the concept of Macroscopic Fundamental Diagram (MFD) relies heavily on an approximation of the trip completion rate derived for steady states. This model, referred to hereafter as the PL model, only requires the knowledge of the MFD, the average trip length and the current accumulation. An alternative approach, known as the trip-based model, allows to determine the trip completion rate exactly (provided ...Conference Paper