Panagiotis G. Tzouras

National Technical University of Athens | NTUA · Laboratory of Transportation Engineering

Safety concerns expressed by micro-mobility users seem to practically constrain the use and flexibility of these new modes. This paper introduces a new, parametric agent-based modeling approach for simulating micro-mobility, using MATSim as a platform. Perceived safety is introduced as a factor, which affects travel behavior of micro-mobility modes...

Street classification is crucial in urban and transportation planning. Conventional approaches prioritize car movement, while recent ones emphasize sustainable modes like walking, cycling, and public transport. However, the literature on sustainable street classification remains limited. Hence, this study aims to develop a method for reformulating...

Flexible public transport is defined as a future mobility solution that adapts to user needs and the fluctuating demand patterns that mainly appear in rural areas. However, the temporal variations in traveler preferences for flexible bus services remain largely unexplored in existing research. This constrains the realization of adaptive and customi...

Walking is both a sustainable transportation option and an easy physical activity. Despite the clear health, environmental and economic benefits, many people are reluctant to walk to their destinations because it can be tiring or time-consuming; therefore, incentives are often needed to encourage walking. This paper presents a novel application (In...

The complex issues of the contemporary city require integrated multi-level planning approaches, especially for addressing climate change challenges towards liveable, vibrant, and meaningfully sustainable cities. In this context, urban form significantly impacts sustainable mobility, while centralities play crucial roles in city accessibility and vi...

Connected and autonomous vehicles. (CAVs) are a paradigm-changing transport technology that has the potential to revolutionize road ecosystems, build environments and cities as a whole, by reshaping their very form. This is a transformation with critical space and culture dimensions that may be complicated and could be responsible for a plethora of...

Micro-mobility transport modes like e-bikes and e-scooters promise higher flexibility when covering the first/last mile trip from/to the public transport stop/station to the destination point and vice-versa. However, safety concerns about riding a micro vehicle in mixed traffic limit the flexibility of shared mobility modes and make conventional on...

New transport strategies, which aspire to create sustainable and resilient cities, prioritize active and public transport modes. This paper investigates the differences in accessibility, mobility and activity patterns as a result of radical road space allocation changes. To do so, the TRANUS Land Use and Transport Interaction model is utilized. Als...

Bicycle-oriented multimodality (cycling and fixed-route public transport) could be considered as an efficient tool in developing a sustainable transport system offering adequate transport services to everyone. This study, therefore, explores whether multimodality can support transport equity in a metropolitan urban environment. To this end, a combi...

The reduction of speed limits in urban roads through traffic calming schemes intends to ensure safer traffic conditions among road users by reducing the probability related to the occurrence of severe accident. Looking it from a different perspective, traffic calming measures can potentially resolve congestion problems at the same time by lowering...

Electric scooters (e-scooters) have become popular in numerous urban areas worldwide, largely due to their positive impact on the environment and the convenience they offer for commuting. However, despite their significant role in the transportation system, there is currently no available simulation software that adequately models their dual behavi...

Modeling of Electric scooters (e-scooters) and prediction of their impacts in the transport system is challenging due to their dual drive behavior i.e., from vehicles' roadway to pedestrians' sidewalk. This study aims to develop a model to integrate e-scooter routing process in an agent-based model, namely: MATSim. The developed model is built on t...

Shared space refers to that part of urban road space that all road users including pedestrians, cyclists, vehicles, and disabled people are encouraged and legally enabled to occupy with little physical or visual separation. It can be considered as a potential design that will solve the road space allocation problem that many dense cities face. Inde...

The objective of this study is to develop and present a mobility dashboard for the AMA to explore traffic flow variations and understand mobility patterns from 2020 until today. To do so, relative indicators like the additional travel time-travel delay, average travel speed and the ratio of peak travel time to off-peak travel times are estimated co...

The reform of teaching practices has been a subject of significant interest in recent years, particularly in light of new challenges posed by virtual and physical classrooms in the post-COVID era. In this context, along with our partners of the V-Global project, we propose a three-stage framework for creating a virtual field trip as an innovative l...

Shared autonomous vehicles (SAVs) aspire to change not only vehicles but also the way people and goods move in urban areas. However, the promotion of such services, that is, whether travelers are willing to share their trips with other service users, is still a challenge. This study aims to examine the contributory factors that influence the willin...

Shared space is an unconventional concept that is not based on formal rules and standards, as it encourages road users to share the same road space with little physical or visual separation. Consequently, this concept creates intriguing research questions that have not been fully answered yet, i.e., a) can a shared space road section produce more p...

Impact evaluation has become one of the core objectives of the transport sector worldwide towards improving its sustainability performance. This study aims to provide a comprehensive overview of the impacts in the field of escooter services. A systematic literature review is conducted on scientific peered- review journal publications in the English...

Shared space assumes that the elimination of physical segregation and traffic control measures forces road users to become more alert, move at lower speeds, and rely on the environmental context for negotiating movement. Still, pedestrians tend to feel reluctant about sharing the space with motorized traffic triggering a coexistence problem. By inv...

Electric scooters (e-scooters) have become popular in many urban areas around the world due to their contribution in the reduction of environmental impacts and the convenience to purchase and use them. Due to their innovative role within the transport system, a simulation software for modeling their dual behavior is not yet available. This research...

The importance of transport systems and their ability to contribute to the economic robustness of a geographic area and the well-being of its inhabitants is noticeable and well documented worldwide. Nevertheless, it is also broadly acknowledged that transportation projects, especially those oriented towards the extensive use of private automobiles...

An adequate road network hierarchy is an essential tool for increasing efficiency in the urban transport system in the era of Sustainable Urban Mobility Plans (SUMPs). In this context, this paper intends to evaluate how these certain planning schemes changed road network hierarchy conditions, using a multicrite-ria approach that adopts various para...

The electric scooter (e-scooter) is an increasingly popular transport mode in urban areas at global level. As an alternative form of shared micromobil-ity in cities, e-scooter sharing systems were first introduced in the United States in 2017. Since then, they have spread in Europe, Asia, and Australia. In order to evaluate their sustainability per...

Understanding, promoting and managing sustainable urban mobility better is very critical in the midst of an unprecedented climate crisis. Identifying, evaluating, benchmarking and prioritising its key indicators is a way to ensure that policy-makers will develop those transport strategies and measures necessary to facilitate a more effective transi...

E-scooters aspire to provide flexibility to their users while covering the first/last mile of a multimodal trip. Yet, their dual travel behavior, i.e., utilizing both vehicles' roadways and pedestri-ans' sidewalks, creates new challenges to transport modelers. This study aims to model e-scooter riding behavior in comparison to traditional urban tra...

Conventional road network hierarchy has focused mainly on facilitating car movement, while (usually) neglecting the rest surface transport modes. This fact resulted in dysfunctional urban environments where a plethora of social, economic and environmental issues are encountered. In this context, serious inequalities regarding urban mobility arise (...

1 Active-mode oriented multimodality (cycling and fixed-route public transport) could be considered as an 2 efficient tool in developing a sustainable transport system offering adequate transport services to 3 everyone. This study, therefore, aspires to explore whether multimodality can support transport equity in 4 a metropolitan urban environment...

Background: The shared space concept assumes that the elimination of physical segregation and traffic control measures force road users to become more alert, move at lower speeds, and rely on the environmental context for negotiating movements. Nevertheless, coexistence is compromised as motorized traffic limits the “freedom” of pedestrians and vic...

E-scooter sharing services been grown exponentially within the last five years. They are based on the flexibility of accessing dense urban areas without specialized infrastructure. In modern cities, there are diverse road environments that impact the comfort, and therefore the attractiveness, of micro-mobility services. This study aims to investiga...

Modeling of electric scooters (e-scooters) and prediction of their impacts in the transport system is challenging due to their dual drive behavior i.e., from vehicles’ roadway to pedestrians’ sidewalk. This study aims to develop a model to integrate e-scooter routing process in an agent-based model, namely: MATSim. The developed model is built on t...

E-scooter sharing services have grown exponentially in many cities of the world within the last 10 years, mainly with the goal to serve first/last mile trips. Compared to other shared mobility modes (e.g., autonomous buses and electric taxis), for which Agent-based Models (ABMs) have been applied in many cases, just a few studies attempted to simul...

Urban communities should now build in specific measures, addressing multimodality and fair distribution of public space. The transformation of arterials into multimodal corridors can be a key strategy that will shape new futures. The social acceptance of “push” measure that aim to modify road space allocation have never been examined following quan...

This study focuses on the concept of shared space, which encourage road users to share the same road space with little physical or visual separation. It contributes to defining traffic parameters in shared space network links by testing three hypotheses, a) high volume of bicycles and pedestrians (vulnerable road users VRUs) leads to higher traffic...

New transportation strategies, which aspire to create sustainable and resilient cities, prioritise active and public transport modes. Because these interventions have multiple effects, an integrated approach in planning became necessary. The aim of this paper is to determine transportation and land use impacts from active travel schemes using a Lan...

In an era of complexity, rapid technological advance and need for climate change action, urban roads may need to transform. The aim of this research is to identify the concepts underpinning the fundamental dimensions of the future urban road and open up an interdisciplinary dialogue about its delivery. We used a combinatorial approach incorporating...

In complex urban road environments, where the safe movement of private cars has been consistentlyprioritized, new micro-mobility modes are introduced creating a road space allocation problem. Urbanand transport planners should answer an important dilemma: to share or segregate urban road space?Perceived safety is hypothesized to be a catalytic fact...

Over the last 10 years, transport policy experts are getting skeptical in regards to using each of traditional policy assessment methods, like Cost-Benefit Analysis (CBA), as the sole tool to evaluate transportation policies/projects. They argue that they do not provide any information regarding the distribution of policy effects across different p...

In shared space, all road users are encouraged to legally occupy the same road space with little physical or visual separation. Complex social interactions that appear in these spaces create complicated ecosystems, which make the estimation of future impacts difficult using classic modeling techniques. This study introduces a concept Agent-Based Si...

Either a result of inadequate supply or perceived high costs, illegal parking is an often-encountered phenomenon in urban areas worldwide and affects the performance and safety conditions of streets. In Greek cities in particular, illegal parking seems to be mostly observed when legal parking supply is limited, while at the same time, there is avai...

Shifting from a fossil-fueled to an eco-friendly vehicle fleet in cities could pave the way towards a more sustainable future. Electric Vehicles (EVs) should thus be prioritized, so that they could replace conventional vehicles gradually. In this context, an EV-accommodating infrastructure, which ensures the functionality of the entire system, is e...

In recent years, EU has placed great importance on the safety of road users (real and perceived). In this context today in Greece, around 180 municipalities are implementing SUMPs for first time and therefore a primary identification of the hazardous points is made through the mapping of traffic incidents. This article presents the results of the m...

The tram is a sustainable mode of transport. However, tram tracks are often shared with vulnerable road users (VRUs) such as pedestrians and cyclists. In this mixed environment, accidents between trams and VRUs are very rare but severe at the same time. Previous studies have acknowledged that tram driving is a complex and very demanding task. Yet,...

The objective of this study is to examine the existence of a connection between the illegal parking phenomenon and the geometrical characteristic of urban streets. Moreover, it selects some traffic calming measures, which will mitigate the problem. Three urban shopping streets with one lane per direction in Nafplio are selected, namely: Char. Triko...

Tram is a sustainable mode of transport, which is able to transform the modern city centers through the various urban regeneration projects that usually come together with it. Tram tracks are often shared with either motorized traffic or pedestrians/cyclists. In this mixed traffic reality, tram accidents are very rare but severe at the same time. T...

The focus of this research is the investigation of the economic sustainability of a cycling infrastructure, which has a big length and suburban character. More in general, the scope is the examination of the positive impacts to the local society and economy of this cycling infrastructure. The study of this problem is based on the use of a Social Co...

The objective of this research is to investigate the correlation between the geometrical characteristics and the illegal parking events. Moreover, this paper analyses the impacts in road safety of this negative phenomenon. To do so, information from literature are collected and a methodological framework is developed. The methodology is divided int...

Cycle lanes design for the connection Argos-Nafplio. Evaluation with the social cost-benefit, Abstract in English: The objective of this study is the design of a cycle track that connects the cities of Argos and Nafplio, using the evaluation method of social cost-benefit analysis. The first step is to establish the area of study, where several pr...