In order to address the very complex problem of urban traffic congestion the paper aims to investigate some "methodological" issues and "operational" benefits which can be derived from the implementation of a hybrid traffic control (TC) strategy. The main focus is on the integration of a within-day traffic flow modelling coupled with a traffic control method in particular: (1) a microscopic traffic flow representation was considered, (2) an enhanced on-line optimisation model able to design the traffic signal decision variables was adopted. Regarding the on-line traffic control a hybrid approach combining the interacting junctions optimisation (e.g. the decision variables are the green timings, the offsets and the stage sequences) and the link metering control was considered.The proposed framework was tested on a simulated case study using a calibrated network consisting of a highly congested sub-network in the city centre of Naples (Italy). The network layout is represented by one diversion node and two alternative paths connecting the same origin-destination pair; two scenarios were analysed: i) the single junction modelling; ii) the on-line scheduled synchronisation with the activation of link metering at upstream pedestrian crossings. The framework effectiveness is evaluated in terms of within-day dynamics with respect to the travel times performance index. © 2019 IEEE.
A hybrid traffic control framework for urban network management
De Luca, S.;Di Pace, R.
;Memoli, S.;Storani, F.
2019-01-01
Abstract
In order to address the very complex problem of urban traffic congestion the paper aims to investigate some "methodological" issues and "operational" benefits which can be derived from the implementation of a hybrid traffic control (TC) strategy. The main focus is on the integration of a within-day traffic flow modelling coupled with a traffic control method in particular: (1) a microscopic traffic flow representation was considered, (2) an enhanced on-line optimisation model able to design the traffic signal decision variables was adopted. Regarding the on-line traffic control a hybrid approach combining the interacting junctions optimisation (e.g. the decision variables are the green timings, the offsets and the stage sequences) and the link metering control was considered.The proposed framework was tested on a simulated case study using a calibrated network consisting of a highly congested sub-network in the city centre of Naples (Italy). The network layout is represented by one diversion node and two alternative paths connecting the same origin-destination pair; two scenarios were analysed: i) the single junction modelling; ii) the on-line scheduled synchronisation with the activation of link metering at upstream pedestrian crossings. The framework effectiveness is evaluated in terms of within-day dynamics with respect to the travel times performance index. © 2019 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
