Guido Gentile | Università degli Studi "La Sapienza" di Roma (original) (raw)
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Papers by Guido Gentile
EURO Journal on Transportation and Logistics, 2014
UrbIS (Urban Information System) è un Sistema Informativo Territoriale per la gestione partecipat... more UrbIS (Urban Information System) è un Sistema Informativo Territoriale per la gestione partecipata degli ambienti urbani. Urbis consente infatti ai cittadini e/o agli operatori municipali di segnalare all'Amministrazioni Pubblica o più in generale ai gestori dei servizi, in maniera semplice ed immediata, la presenza sul territorio di specifici problemi relativi a tematiche quali: la manutenzione delle strade e dell'arredo cittadino, la sicurezza della circolazione e del territorio, il controllo della sosta e del decoro urbano. Al contempo, fornisce alle amministrazioni uno strumento efficace ed efficiente per processare le segnalazioni ricevute, nonché un vero e proprio Sistema di Supporto alle Decisioni per la pianificazione degli interventi o l'identificazione di politiche per la gestione e il controllo del territorio in ambito urbano. UrbIS è implementato come un web-gis basato sugli standard WFS-T e WMS; l'interfaccia è estremamente semplice ed intuitiva. Inoltre, la sua adesione a protocolli standard di comunicazione ne permette l'integrabilità con sistemi già esistenti.
We propose in this paper a new approach for modelling congested transit networks with fixed timet... more We propose in this paper a new approach for modelling congested transit networks with fixed timetables where it may happen that there is not enough room onboard to allow all users waiting for a given line on the arriving carrier, so that passengers need to queue at the stop until the service becomes actually available to them.
Il road pricing è uno degli strumenti più efficaci per migliorare l'efficienza di reti di traspor... more Il road pricing è uno degli strumenti più efficaci per migliorare l'efficienza di reti di trasporto fortemente congestionate.
Intersections are the most critical elements of road networks, especially in urban contexts. In t... more Intersections are the most critical elements of road networks, especially in urban contexts. In the representation of junctions for macroscopic DTA models, the usual assumption is that every conflict among intersecting traffic streams of different manoeuvres is fully solved by traffic signals. This simplifies the simulation of intersections, given that only merging and diversions are to be reproduced, and most DTA models are capable of addressing these basic topologies. However, quite often in practice we have intersecting manoeuvres that comply with some precedence and/or gap-acceptance rule, even in signalized junctions. These phenomena are very well tackled by micro-simulation models, while limited research has been produced to successfully and efficiently represent nodes with conflict areas in macroscopic models for Dynamic Traffic Assignment. This article addresses the above issue, providing a new formulation for conflicting traffic streams in the context of the General Link Transmission Model. To this end, the merging model with priorities is extended by associating a capacity to each manoeuvre, while the scarce resource to be split becomes the time of the conflict area. A specific parameter to reproduce different driver behaviour from polite to aggressive is also introduced. The model has been implemented in the software for Dynamic Traffic Assignment called TRE. Numerical results are presented to show how the model works for different combinations of flows, capacities and priorities.
1 7.5 Dynamic traffic assignment with non separable link cost functions and queue spillovers In t... more 1 7.5 Dynamic traffic assignment with non separable link cost functions and queue spillovers In this Section, in comparison with the formulation described in Section 7.4.2, two main improvements are introduced, so achieving the possibility of solving the within-day Dynamic Traffic Assignment (DTA) problem on large road networks while simulating explicitly the formation and dispersion of vehicle queues.
Pricing is one of the best tools to improve the efficiency of highly congested transportation net... more Pricing is one of the best tools to improve the efficiency of highly congested transportation networks. It has been shown that an optimal toll pattern can be determined by applying the welfare-economics principle of marginal pricing.
EURO Journal on Transportation and Logistics, 2014
UrbIS (Urban Information System) è un Sistema Informativo Territoriale per la gestione partecipat... more UrbIS (Urban Information System) è un Sistema Informativo Territoriale per la gestione partecipata degli ambienti urbani. Urbis consente infatti ai cittadini e/o agli operatori municipali di segnalare all'Amministrazioni Pubblica o più in generale ai gestori dei servizi, in maniera semplice ed immediata, la presenza sul territorio di specifici problemi relativi a tematiche quali: la manutenzione delle strade e dell'arredo cittadino, la sicurezza della circolazione e del territorio, il controllo della sosta e del decoro urbano. Al contempo, fornisce alle amministrazioni uno strumento efficace ed efficiente per processare le segnalazioni ricevute, nonché un vero e proprio Sistema di Supporto alle Decisioni per la pianificazione degli interventi o l'identificazione di politiche per la gestione e il controllo del territorio in ambito urbano. UrbIS è implementato come un web-gis basato sugli standard WFS-T e WMS; l'interfaccia è estremamente semplice ed intuitiva. Inoltre, la sua adesione a protocolli standard di comunicazione ne permette l'integrabilità con sistemi già esistenti.
We propose in this paper a new approach for modelling congested transit networks with fixed timet... more We propose in this paper a new approach for modelling congested transit networks with fixed timetables where it may happen that there is not enough room onboard to allow all users waiting for a given line on the arriving carrier, so that passengers need to queue at the stop until the service becomes actually available to them.
Il road pricing è uno degli strumenti più efficaci per migliorare l'efficienza di reti di traspor... more Il road pricing è uno degli strumenti più efficaci per migliorare l'efficienza di reti di trasporto fortemente congestionate.
Intersections are the most critical elements of road networks, especially in urban contexts. In t... more Intersections are the most critical elements of road networks, especially in urban contexts. In the representation of junctions for macroscopic DTA models, the usual assumption is that every conflict among intersecting traffic streams of different manoeuvres is fully solved by traffic signals. This simplifies the simulation of intersections, given that only merging and diversions are to be reproduced, and most DTA models are capable of addressing these basic topologies. However, quite often in practice we have intersecting manoeuvres that comply with some precedence and/or gap-acceptance rule, even in signalized junctions. These phenomena are very well tackled by micro-simulation models, while limited research has been produced to successfully and efficiently represent nodes with conflict areas in macroscopic models for Dynamic Traffic Assignment. This article addresses the above issue, providing a new formulation for conflicting traffic streams in the context of the General Link Transmission Model. To this end, the merging model with priorities is extended by associating a capacity to each manoeuvre, while the scarce resource to be split becomes the time of the conflict area. A specific parameter to reproduce different driver behaviour from polite to aggressive is also introduced. The model has been implemented in the software for Dynamic Traffic Assignment called TRE. Numerical results are presented to show how the model works for different combinations of flows, capacities and priorities.
1 7.5 Dynamic traffic assignment with non separable link cost functions and queue spillovers In t... more 1 7.5 Dynamic traffic assignment with non separable link cost functions and queue spillovers In this Section, in comparison with the formulation described in Section 7.4.2, two main improvements are introduced, so achieving the possibility of solving the within-day Dynamic Traffic Assignment (DTA) problem on large road networks while simulating explicitly the formation and dispersion of vehicle queues.
Pricing is one of the best tools to improve the efficiency of highly congested transportation net... more Pricing is one of the best tools to improve the efficiency of highly congested transportation networks. It has been shown that an optimal toll pattern can be determined by applying the welfare-economics principle of marginal pricing.