Analysis of the maritime networks: criticalities and resilience

Since the second half of the twentieth century, maritime transport has been characterized by specific dynamics. There has been an unprecedented growth of freight flows, in a context of decolonization, rapid globalization (second wave), and rise of emerging countries through production delocalization. Ports are key players in the global supply chain, as critical nodes at the interface between land and sea. However, disruptions of all kinds can have important repercussions on this supply chain. Maritime networks have reached a high level of optimality and concentration, but also of vulnerability, as global shipping circulations depend more and more on a handful of major hubs. The aim of this paper is to test the network impacts of the global financial crisis (2008-2009), which caused the collapse of the world demand for goods and significant decreases in GDP and maritime traffic volumes, in order to correlate them with those of the COVID-19 pandemic. Historical, daily data on containership movements allow us to trace such impacts with precision, in order to study port traffic dynamics, network topology, and geographical variations. Methods are borrowed from the field of graph theory and complex networks. This analysis contributes to the literature on network criticalities in general, while it also discusses the capacity of ports and maritime networks to recover from a major shock. © 2023 The Authors. Published by ELSEVIER B.V.

Detailing DRT users in Europe over the last twenty years: a literature overview

Travel choices in terms of means of transport and frequencies have changed during the recent pandemic period due to mobility restrictions, the growing fear of contagion and, especially in some months, the reduction of public transport capacity during the phases of the pandemic (especially for low demand areas). These trends must be analysed in order to optimize the implementation of possible complementary solutions to fill the deficit of local public transport (TPL) by introducing for example the Demand Responsive Transport services (DRT). A preliminary analysis is useful to identify the most efficient, effective and sustainable solutions in the various contexts, taking into account users and their motivation to travel. A growing need for "on-demand" mobility is linked to the increase in the number of elderly and disabled people. With a lack of alternative services and a reluctance to bear the burden and cost of ownership of vehicles, transport infrastructure will be particularly important to this aging population. Therefore, the improvement of transport services must consider some main characteristics of this modal choice are: being user-oriented;guarantee the accessibility of the service via the web, on specific platforms available on fixed and mobile devices and also enjoy the versatility of use with reference to the areas and users to be served. The present work, therefore, focuses on an evaluation of the literature, defining the main characteristics of DRT in Europe over the last twenty years. The results lay the foundations for a better planning of the service in the post-pandemic phase and a diffusion of bottom-up approaches for the calibration of the service itself through the dissemination of survey campaigns. © 2023 The Authors. Published by ELSEVIER B.V.

Analysis of the maritime networks: criticalities and resilience

Since the second half of the twentieth century, maritime transport has been characterized by specific dynamics. There has been an unprecedented growth of freight flows, in a context of decolonization, rapid globalization (second wave), and rise of emerging countries through production delocalization. Ports are key players in the global supply chain, as critical nodes at the interface between land and sea. However, disruptions of all kinds can have important repercussions on this supply chain. Maritime networks have reached a high level of optimality and concentration, but also of vulnerability, as global shipping circulations depend more and more on a handful of major hubs. The aim of this paper is to test the network impacts of the global financial crisis (2008-2009), which caused the collapse of the world demand for goods and significant decreases in GDP and maritime traffic volumes, in order to correlate them with those of the COVID-19 pandemic. Historical, daily data on containership movements allow us to trace such impacts with precision, in order to study port traffic dynamics, network topology, and geographical variations. Methods are borrowed from the field of graph theory and complex networks. This analysis contributes to the literature on network criticalities in general, while it also discusses the capacity of ports and maritime networks to recover from a major shock. © 2023 The Authors. Published by ELSEVIER B.V.

Detailing DRT users in Europe over the last twenty years: a literature overview

Travel choices in terms of means of transport and frequencies have changed during the recent pandemic period due to mobility restrictions, the growing fear of contagion and, especially in some months, the reduction of public transport capacity during the phases of the pandemic (especially for low demand areas). These trends must be analysed in order to optimize the implementation of possible complementary solutions to fill the deficit of local public transport (TPL) by introducing for example the Demand Responsive Transport services (DRT). A preliminary analysis is useful to identify the most efficient, effective and sustainable solutions in the various contexts, taking into account users and their motivation to travel. A growing need for "on-demand" mobility is linked to the increase in the number of elderly and disabled people. With a lack of alternative services and a reluctance to bear the burden and cost of ownership of vehicles, transport infrastructure will be particularly important to this aging population. Therefore, the improvement of transport services must consider some main characteristics of this modal choice are: being user-oriented;guarantee the accessibility of the service via the web, on specific platforms available on fixed and mobile devices and also enjoy the versatility of use with reference to the areas and users to be served. The present work, therefore, focuses on an evaluation of the literature, defining the main characteristics of DRT in Europe over the last twenty years. The results lay the foundations for a better planning of the service in the post-pandemic phase and a diffusion of bottom-up approaches for the calibration of the service itself through the dissemination of survey campaigns. © 2023 The Authors. Published by ELSEVIER B.V.

An Analysis of the Integration of DRT Services with Local Public Transport in Post-pandemic Period: Some of the Preliminary Insights in the Italian Context

Italy was one of the first country in Europe which was severely affected by COVID-19 pandemic. Several critical issues emerged during the different pandemic phases, especially in the health and mobility sector. Restrictions on public transport reduced the supply of transport, highlighting the need to rethink complementary transport systems. Since May 2020, in the post-lockdown phase, the provision of local public transport has been based on ordinary services, such as bus services, which are mainly intended to meet the needs of systematic travel between the places of residence and work on main development routes of the territory. These services have undergone reductions both in the on-board capacity and in some cases the complete elimination of transit routes. The rebalancing in favour of sustainable modes of transport and the reduction of the share of road mobility is pursued through the encouragement of ad-hoc measures aimed at balancing-off the supply-demand mechanism and improving the quality of services. The application of an on-demand responsive transit system has the ability to improve the transit needs in order to reach the places where personal or family services are provided or to enjoy the resources distributed within desired territory. In Italy since March 2020, new areas of weak demand for transport have been created, i.e. areas with a certain number of users that need to be transferred to and from places that have generally never had access to public transport or have had it restricted. The Demand Responsive Transport (DRT) system is, therefore, used in both urban and suburban areas, allowing even those who do not have their own means of transport (for example, disadvantaged social categories or users with a short stay in the area) or who are suitably equipped (people with reduced or no motor skills), to move around in areas easily. The present work focuses on an analysis of the current state of affairs, starting from the literature and regulations concerning the diffusion of the DRT systems in Italy, and offers some ideas for the optimisation of an integrated public transport service. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Exploring the Factors that Encourage the Spread of EV-DRT into the Sustainable Urban Mobility Plans

The development of sustainable mobility is linked to technological developments and different forms of vehicle power supply. Despite all the difficulties brought by the COVID-19 pandemic, therefore, it is necessary to provide road users with an adequate network of public recharging infrastructures and to facilitate the setting-up of private recharging stations through shared and participatory development plans between the stakeholders and all the institutions involved. The present work introduces an analysis of some of the European Sustainable Urban Mobility Plans (SUMPs) and the transport supply connected to several cities. After an evaluation of the macro areas of intervention, factors and criteria for the deployment of the electric vehicle linked to the demand responsive transport choice (EV-DRTs) have been defined in terms of user classification and environmental factors, but also considering the services and infrastructures for electric charging. The identification of these factors and criteria allows an exemplification in the development and adaptation of the planning and design concept. © 2021, Springer Nature Switzerland AG.