Joao de Abreu e Silva

Instituto Superior Técnico · Department of Civil Engineering Architecture and Georesources

The ubiquitous use of mobile devices along with the amount of traffic, transportation services, and travel pattern data available has led to the emergence and deployment of smartphone applications for providing information about personal travel management. Several of these travel apps are aimed at voluntary travel behavior change (VTBC) to support...

While living in city centers is usually linked to higher accessibility levels, shorter travel times, and higher levels of public transit (PT) utilization, the opposite is true for residents of suburban areas. This assumption holds in metropolitan contexts, where central areas offer better accessibility and are associated with higher levels of PT us...

Promoting density and implementing mixed land use have long been acknowledged as potentially effective land use based solutions to transportation problems. However, the policy has leaned toward mobility-based solutions, favouring rapid travel instead of high proximity. This tendency seems now to be reversing with the increasing popularity of the 15...

Although issues of equity and accessibility have already been addressed in transportation, especially with regard to the distribution of costs and benefits, there is no consensus on which concept and metric of fairness would be most appropriate for the evaluation of transportation infrastructure proposals. Normally, a utilitarian perspective is ado...

In this paper we present the findings of the 12th ISCTSC conference workshop on commercial trips patterns and demand for goods from firms and households. With discussions structured on 3 key dimensions (subjects of observation, indicators and factors of change), this workshop highlighted the complexity of observational methods combining household a...

This paper focuses on the design and analysis of a one-week shopping survey and its comparison with an existing one-day travel survey. We test specifically for trip rates and mode choice. We find that the one-week shopping survey, with very disaggregated shopping trip purposes (items), provides more accurate results concerning underreporting of sho...

The immobility induced by the COVID-19 mandatory telecommuting has left its trail in how we commute and, more generally, move. Our research explores thirty individual experiences with "mandatory immobility", from which three themes emerged: flexibility and perceived autonomy, social interaction, and cabin fever and physical and mental well-being. T...

When a 1995-2010 time series of commercial establishments data is interrupted, a Cellular Automata is used to bring the data to 2020. At the same time, a cluster analysis is performed over a different authoritative dataset for 2020, which we enrich with VGI (OSM). The CA results show that street centrality (measured through Choice and Integration f...

This paper uses a structural equation model and multigroup analysis to analyze data from a two-wave seven-day shopping and travel survey implemented in Lisbon before the COVID-19 pandemic (January-February 2020) and in its aftermath (April-May 2022). The results show that, in 2022, variables such as education or income, often used to characterize o...

This chapter aims to provide an overview of new mobility modes and services and their relevant land-use implications. This overview, although briefly mentioning autonomous vehicles and Mobility as a Service, is mostly focused on shared-mobility systems. These include bike-sharing, scooter-sharing and several car-based systems - ride-sharing, ride-h...

This paper investigates the causal effects of the development of the Portuguese motorway network between 1981 and 2011 on the size of the local economy and the commuting of workers. We use instrumental variables based on transport networks from the late 18th century and 1945 as sources of pseudo-random variation for the location of motorways. The a...

This work analyzes the effects of land use patterns on household travel related CO₂ emissions, using data collected in the Lisbon Metropolitan Area. To pursue this objective a Structural Equation Model is built. This model accounts for the existence of self-selection related with car ownership preferences. The obtained results support the claim tha...

Although location theory is now almost two centuries old, the firms' location choice processes are yet to be fully understood. And while accessibility, in some form, has long been used as an explanatory factor, spatial configuration measures (space syntax) have hardly been used in location models, and longitudinal analyses have also been infrequent...

This is the Supplementary Material to the paper "Exploring the role of accessibility in shaping retail location using space syntax measures: A panel-data analysis".

O termo equidade pode ser relativamente vago, portanto, suscetível a diferentes interpretações. Assim, tanto a definição quanto a medida adotada podem afetar significativamente os resultados da análise (Litman, 2018). A equidade nos transportes faz referência à distribuição justa de custos e benefícios do transporte no território ou em grupos demog...

Universities generate a significant volume of daily commuting, in addition to being a favorable environment for development of new habits and behavior, as result of the influence among those who attend them. This study addressed a survey, based on Theory of Planned Behavior and Theory of Human Motivation, to UFRRJ students in order to identify the...

The local built environment characteristics deeply influence pedestrians’ behavior, favoring or imposing barriers on walking trips. However, identifying micro-scale built environment data is challenging and time consuming, and in developing countries there is a general lack of reliable information at street level. The recent development of machine...

Walkable neighborhoods are known for bringing social and economic benefits to their residents. One of these benefits is the real estate premium associated with the neighborhood's walkability, which has been explored in studies worldwide. Here, we extend the available evidence by proposing the evaluation of the walkability premium in a new context....

Global South cities are vastly underrepresented in the literature that analyzes the relationships between location choice, land-use patterns and travel behavior. This paper aims to reduce that underrepresentation by bringing new evidence from a metropolitan region in the Global South. We estimate a Structural Equation Model to study the relationshi...

This study investigates the factors that influenced the allocation of motorways across municipalities in mainland Portugal. Our analysis, based on Poisson Pseudo-maximum Likelihood models, suggests that population size and market potential in 1981 are important determinants of motorway density in 2020. Physical and geographical variables also help...

Confinement measures imposed during the COVID 19 pandemic forced several people to work from home. As telework reduces commuting costs there is the possibility of contributing to urban sprawl as it allows people to move to the periphery. A web based survey focusing on telework was deployed in the Lisbon Metropolitan Area. A Structural Equation Mode...

To improve the traveling experience, researchers have been analyzing the role of attitudes in travel behavior modeling. Although most researchers use closed-ended surveys, the appropriate method to measure attitudes is debatable. Topic Modeling could significantly reduce the time to extract information from open-ended responses and eliminate subjec...

To improve the traveling experience, researchers have been analyzing the role of attitudes in travel behavior modeling. Although most researchers use closed-ended surveys, the appropriate method to measure attitudes is debatable. Topic Modeling could significantly reduce the time to extract information from open-ended responses and eliminate subjec...

A one week shopping survey is compared with a one day travel survey. Underreporting and item non response emerge from this analysis (the full paper will be coming to Transportation Research Procedia asap).

In modelling multimodal choices, the definition used by the analyst might impact the analysis results, behavioural insights and policies. To understand this further, we pursue the following objectives: a. To analyse the importance of different definitions of multimodality and its operationalisation as dependent variables and understand travel behav...

Value of time (VoT) is one of the most critical parameters in transportation and is taken into consideration by transport planners and policymakers for new investment plans, policies, and the introduction of new mobility services or transport modes. This paper focuses on autonomous vehicles and conducts a meta-analysis to explain how the value of t...

The poster refers to ongoing research about e-shopping geography in Lisbon. Additional info can be found in the paper of the same name that has since been published in the Journal of Retailing and Consumer Services.

The need to design systems that serve travellers better has encouraged researchers to understand and incorporate attitudes into travel behaviour modelling. However, the appropriate method to measure these qualitative constructs is often debated, and researchers have preferred the closed-ended approach over the open-ended approach. However, Topic Mo...

E-shopping is growing globally, and the COVID-19 pandemic further accentuated this tendency. In this paper, online shopping adoption is analysed in Lisbon immediately before the pandemic outbreak. By focusing on an urban area, the impact of variables such as internet access or access to delivery services is controlled, thus enhancing the remaining...

Temporary opportunities for studying and working abroad have been growing globally and intensifying the movement of highly skilled temporary populations. To attract this group, cities need to address their residential and mobility needs. This study focuses on factors influencing residential and travel satisfaction of transnational temporary residen...

Travel behavior adaptations resulting from international temporary relocation is understudied, despite their increasing relevance. The scarce published literature on the subject overlooks the local contexts and ignores aspects related to the adaptation processes and motivations. This study aims to partially fill this gap by addressing the travel be...

Abstract: Commercial classification is essential to describe and compare the spatial patterns of commercial activity. Most classification systems consider a large set of dimensions that include detailed features such as store ownership or development type. Since new business models are continually being developed, the need to revise classification...

The dominant tradition in transport planning and policy practice considers travel as a derived activity and travel time as an economic disutility. A growing body of literature is challenging this perspective, demonstrating that being ‘on the move’ is a rich experience interlaced with profound shared and individual meanings that can have positive im...

The steady growth of online shopping in the last decades has led to an impact on personal travel and on freight transport that is yet to be fully grasped. Previous research on the subject offers mixed findings, with several studies pointing to complementarity between online and in-store shopping, while others suggest substitution, modification, or...

The poster is about the article of the same name, and thus addresses the impacts of online on travel demand, which was found to be different on weekends and weekdays. The data is from a shopping survey which was implemented immediately before the covid19 outbreak, and the model is a SEM.

Temporary transnational relocation is a growing type of migration. However, travel behavior adaptation of highly skilled temporary residents and its urban impacts have largely been ignored. This study extends the knowledge of mobility biographies, mobility cultures, and mobility of millennials by examining how temporary residents adapt their intra-...

For practical reasons, surveys that aim for a large number of respondents tend to restrict themselves to closed-ended responses. Despite potentially bringing richer insights, the use of open-ended questions poses great challenges in terms of extracting useful information while significantly increasing the analysis time. Nevertheless, automatic text...

The walkability premium on real estate price has been evaluated, and positive and significant results have been found using different European and North American cities as case studies. The aim of this research was to test this effect in a Global South context, in two Brazilian cities where pedestrian-oriented urban environments are scarce and wher...

Understanding the link between mode choice and travel satisfaction is essential for promoting sustainable travel by expanding utility theory to include also the eudaimonic value of travel. The study focuses on the hypothesis that more then it’s functional value of arriving from A to B, mode choice creates travel experiences that answer high-order n...

Information and Communication Technologies (ICT) enable individuals to travel more flexibly. The choice of location for social activities has become very flexible. In addition to this, land-use characteristics also play a vital role in the location of social activities. This work aims to analyse the influence of land-use characteristics, ICT use, a...

In recent years, persuasive interventions delivered through mobility-management tools have received attention as a means to motivate change for sustainable urban mobility. This paper aims to pinpoint and understand the drivers that influence individuals’ travel decisions when using travel apps including both travel information and persuasive featur...

The increasing complexity and demand of transport services strains transportation systems especially in urban areas with limited possibilities for building new infrastructure. The solution to this challenge requires changes of travel behavior. One of the proposed means to induce such change is multimodal travel apps. However, understanding the moti...

Public transport network organization should allow efficient and comfortable transfers in interchanges, but these infrastructures are often associated with high pedestrian flows and constraints on pedestrian movement, which discourages their use. The analysis methods for the performance of public transport interchanges are usually based on aggregat...

The difficulties associated with the collection and analysis of open-ended questions in surveys (e.g. “Tell us your opinion about…”), have encouraged the widespread use of closed-ended responses (e.g. “Your opinion according to a scale of 1-5…”). These, in some circumstances, are very restrictive, curbing the recognition of nuances in the survey po...

The initial enthusiasm for home-based telework as an attractive travel demand management strategy has been countered by recent research pointing to its inductive effects on travel. This paper develops path analysis models for one- and two-worker households in Great Britain, using data from the National Travel Survey (2005–2012), to study the effect...

Urban sprawl is a general label applied to urban forms that share common characteristics as low-density, inefficient consumption of land, fragmentation and leapfrog growth. As in many countries in the last century, urban sprawl has influenced heavily the Portuguese urban structure. Peri-urbanization was the dominant sprawl manifestation, creating,...

Researchers have long been divided on what is the appropriate method for measuring attitudes, Likert scale or open-ended questions. The simplicity in use and measurement, has favoured the use of Likert scales. Use of open-ended questions posed serious challenges to the researchers in analysing the textual data. However, advances in Machine Learning...

This work analyzes the effects of home-based teleworking on the number of trips and weekly miles travelled by mode and purpose for one-worker households in Great Britain using data from the National Travel Survey for the period between 2005 and 2012. Two path analysis models are developed, one considering weekly trips and travel distances by mode a...

This work studies the relationships between the number of complex tours (with one or more intermediate stops) and simple home-based tours, total distances traveled by mode, and land-use patterns both at the residence and at the workplace using path analysis. The model includes commuting distance, car ownership and motorcycle ownership, which are in...

We test the effect of different contextualization, scaling, framing and formatting of environmental impacts and health benefits information on commuting mode choice. For this, a stated preference (SP) survey was designed. To also test survey mode effect, the survey was administrated both online and face-to-face. We find statistical differences acro...

We test the effect of different contextualization, scaling, framing and formatting of environmental impacts and health benefits information on commuting mode choice. For this, a stated preference (SP) survey was designed. This survey was administrated online and using face-to-face interviews. We find statistical differences across the two samples i...

Assuming freight trip generation as the total number of freight vehicles arriving to retail establishments, for loading/unloading purposes and within a defined time period, we experiment and compare four alternative modeling methodologies to predict freight trip generation. The aim is to achieve better freight trip generation models, thus contribut...

This study provides new evidence on the relationship between household and intra-household commuting travel and home telework for Great Britain using data from the National Travel Survey for the period between 2005 and 2012. The results from the empirical models of individual and household commuting travel suggest there is some evidence of longer w...

This article sets at contributing to research on retail, by analysing persistent commercial location patterns. Classic concepts of retail location and agglomeration, but also retail classification, are explored and applied to Lisbon, which poses as the case study. The analysis considers censuses carried out in three distinct decades, both commercia...

In this research, we investigate the acceptability of three new and emerging smart mobility options and quantify the associated willingness-to-pay values in the context of Lisbon using a comprehensive stated preferences (SP) survey. The smart mobility options include shared taxi, one-way car rental, and a novel combination of park-and-ride and scho...

Cruising for parking represents a loss of efficiency to the private car. It generates a waste of time and fuel, worsens congestion and increases pollutant emissions. Most approaches trying to mitigate cruising on the street use price to manage demand. Here, an online system of curb parking space reservations is proposed. Reservations eliminate the...

The relatively recent developments in Information and Telecommunication Technologies (ICT) arose the interest of both researchers and policymakers about how these technologies could shape travel. Several hypotheses have been put forward relating the use of ICT and travel behaviour. These include substitution of travel; complementarity or induction;...

Recent developments in Information and Telecommunication Technologies (ICT) lead to the emergence and development of the web 2.0 and social media, as well as the dissemination of smartphones and related web applications. These technologies and devices could potentially influence travel behavior, and in particular social travel and activities. Here,...

The role of urban freight vehicle trips in fulfilling the consumption needs of people in urban areas is often overshadowed by externality-causing parking practices (e.g., double-parking associated with traffic delays). Loading/unloading bays are generally viewed as an effective way to avoid freight vehicles double-parking, but are often misused by...

As the worldwide financial crisis is directly connected to the transport sector, public transport systems become a central player to support economic recovery. Transit services are facing a number of challenges as a consequence of this severe crisis. However, each attribute characterizing transit services have evolved in a different manner, arising...

Urban sprawl is a form of urban growth associated with disproportional impacts when comparing its spatial occupation with other urban forms that greatly expanded in the 20th century. In Portugal, the phenomenon started in the decades of 1970/1980 with an occurrence mainly in the two existent metropolitan areas of Lisbon and Oporto as well in the co...

This paper studies the impacts of Madrid-Seville High-Speed Rail (HSR) on land-cover change in the five HSR connected cities – Madrid, Ciudad Real, Puertollano, Cordoba, and Seville. The analysis period ranges from 1991 to 2006. The study finds that, in the Madrid-Seville region, the land development process concentrates mostly toward the two large...

Cycling has been commonly neglected in urban transport planning. In the same fashion, there is a shortage of available data on cycling mobility, especially in countries with low rates of bicycle share. Nevertheless, a modal shift towards soft modes such as cycling appears to be one of the keys for progressing towards a sustainable urban mobility pa...

The initial enthusiasm for home-based telework as an attractive travel demand management strategy has been countered by recent research pointing to its inductive effects on travel. This paper develops path analysis models for one- and two-worker households in Great Britain, using data from the National Travel Survey (2005-2012), to study the effect...

The importance of social networks in counteracting mobility limitations is often overlooked despite allowing individuals to remain included under otherwise adverse conditions. Living in poor accessibility areas and having low mobility is associated with a higher risk for social exclusion; that is, the ability to participate fully in society. In ord...

This paper explores the relations between perceived urban freight delivery parking issues and commercial establishment characteristics, their associated distribution channels, delivery operation patterns and local land use patterns using a structural equations modeling framework. The main motivation is to test hypothesized relations between urban f...

The relatively recent developments in Information and Telecommunication Technologies (ICT) arose the interest of both researchers and policymakers about how these technologies could shape travel. Several hypotheses have been put forward relating the use of ICT and travel behaviour. These include substitution of travel; complementarity or induction;...

In transportation projects, uncertainty related to the difference between forecast and actual demand is of major interest for the decision-maker, as it can have a substantial influence on the viability of a project. This paper identifies and quantifies discrete choice model uncertainty, which is present in the model parameters and attributes, and d...

This paper studies the effects of high-speed rail (HSR) on land cover change in the Lisbon metropolitan area (LMA) in Portugal according to a bilevel cellular automata/agent-based modeling framework. The model incorporates spatial mixed logit models at the local level and panel simultaneous equations models at the regional level. The regional submo...

The objective of this paper is to investigate the impacts of the HSR network on the regional development of the Spanish provinces from 1990 up to 2010, by applying a simultaneous-equation modeling approach. The proposed model possesses a systematic perspective, the relationships between HSR and the various aspects of the regional development intera...

Web and smartphone surveys are increasingly being used to collect travel information. This workshop explored respondent interaction with these tools, covering a range of research concerns. While smartphone surveys facilitate real-time passive collection of continuous data, thereby reducing respondent burden, their use raises many issues common with...

Assuming freight trip generation as the total number of freight vehicles arriving to retail establishments, for loading/unloading purposes and within a defined time period, we experiment and compare four alternative modeling methodologies to predict freight trip generation. The aim is to achieve better freight trip generation models, thus contribut...

Urban sprawl is a type of urban growth which is generally considered as mainly negative that entails a series of negative impacts. One specific negative impact is the high municipal direct monetary costs associated with it, when compared with other types of urban growth, e.g. compact city1. Municipal monetary costs are related with the construction...

Energy costs account for an important share of the total costs of urban and suburban bus operators. The purpose of this paper is to expand empirical research on bus transit operation costs and identify the key factors that influence bus energy efficiency of the overall bus fleet of one operator and aid to the management of its resources.We estimate...

The processes of airport planning and location choice for a new airport take usually a long time to develop and mature. During this time various changes usually occur. Generally these changes comprehend technological changes, changes in environmental legislation, usually becoming more restrictive, changes in the processes and paradigms of territori...