Jose Viegas

• International Transport Forum, Paris

The maintenance of diesel Engines is usually scheduled according to the maintenance procedures defined by manufacturers. However, the state of the art shows that the condition monitoring maintenance associated with adequate prediction algorithms allows performance improvement both by increasing the intervals between interventions and by helping to...

It is known that the Modernism greatly influenced the way people use spaces, the car use was prioritized, changing the function of the street from a meeting space (human scale – Gehl, 2010) to a passage space (motor scale). It is in this context that this paper aims to present the aspects that interfere in the walkability with focus on different ur...

This paper examines the changes that might result from the large-scale uptake of a shared and self-driving fleet of vehicles in a mid-sized European city. The work explores two different self-driving vehicle concepts – a ridesharing system (Shared Taxi), which emulates a taxi-like system where customers accept small detours from their original dire...

This paper presents the results of a part of a doctorate thesis whose aim is to check how the form of spaces interferes in displacements on foot. The methodology here presented is only part of what was carried out in order to answer such questions. Therefore, in order to find out which factors interfere in generating trips in three neighbourhoods w...

The present paper aims at examining which factors interfere on the choices people make of modes of transport or path (when walking), take into account four variables groups: geometrics, syntactic, land use and transportation accessibility. For that purpose, an online questionnaire was applied to formulate a Discrete Choice Model in two parts: mode...

This paper aims to determine which groups of factors correspond to different road networks present in three neighborhoods of Lisbon whose morphological and syntactic features are significant distinctions between them. For this, we used the statistical technique of Cluster Analysis, which aims to classify objects by observing the similarities and di...

This paper aims to determine how the different elements that comprehend pedestrian environment relate. These elements were classified into (a) geometric – sidewalks width, road segments slope, etc. –; (b) syntactic – road segments integration, connectivity, etc. –; (c) activities – area and density of uses per road segment –; and (d) transport acce...

Este artigo apresenta os fatores que interferem positivamente e/ou negativamente nos deslocamentos a pé ao redor do mundo, tendo em conta a forma urbana. Para tanto, utilizou-se um questionário online no qual apresentou uma lista com 23 fatores, desmembrados em 71 variáveis, a serem avaliados pelos respondentes. Verificou-se que os aspectos negativ...

This paper presents the formulation of a new optimization problem designated as the express minibus problem, which intends to form small groups of clients with compatible boarding/exiting points in time and space for a new type of urban mobility service. This new transport option, as a competitive alternative to the private car, aims to provide alm...

This paper presents a new concept of urban shared-taxi services. The proposed system has a new organisational design and pricing scheme that aims to use the capacity in traditional taxi services in a more efficient way. In this system, a taxi acting in ‘sharing’ mode offers lower prices to its clients, in exchange for them to accept sharing the veh...

O artigo explora o desempenho de diferentes malhas viárias de modo a apresentar quais variáveis estão mais presentes em cada tipo de malha criando diretrizes para a composição de um índice de caminhabilidade. São utilizados três bairros de Lisboa como estudos de caso: (a) Campo de Ourique – cuja malha é regular – (b) Graça – caracterizado pela irre...

Carpooling systems have never been able to achieve significant reductions in the use of private vehicles. The psychological barriers associated with riding with nonacquaintances and losing the flexibility of using one's private vehicle as a single occupant are often referred to. However, the effect of these issues is hard to determine as they revea...

The paper analyzes the performance of different street plans to determine which variables are present in each type, as first step to creating a walkability index. Three neighbourhoods of Lisbon are used as case studies: (a) Campo de Ourique - with a grid-based street plan - (b) Graça – with irregular roads - and (c) Telheiras - with a contemporary...

Taxis represent a significant share of urban trips in most cities around the world. Historically this market has been in the hands of private companies whose business is regulated by public authorities. Due to the duality of interests of both these actors, it has been difficult to establish the position of this mode among the rest of the urban tran...

This paper tries to break new ground in how distance-decay relationships are modelled in accessibility and transport demand studies and does it based on an innovative approach to empirical data collection on psychological perceptions of distance in relation with activities located in space and a new aggregate distance-decay function. This new appro...

RESUMO O artigo tem por objetivo explorar o desempenho de diferentes malhas viárias de modo a apresentar quais variáveis estão mais presentes em cada tipologia de malha criando, deste modo, diretrizes para a composição de um índice de walkability ("caminhabilidade"). Para tanto, são utilizados três bairros da cidade de Lisboa como estudos de caso:...

This paper presents a real-time trip-planner system for the public transport in Lisbon. This system has the capability of informing potential customers about which are the best routes to make the trip they want, when they want and what are the expected travel times, based on the actual locations of the public transport vehicles and the travel speed...

The main objective of the Motorways of the Sea (MoS) projects is to develop high quality maritime-based intermodal links to bypass congested land transport corridors so that they can provide an alternate competitive means of transport to unimodal road freight transport. The MoS projects are a political initiative of the European Commission (EC) but...

Motorways of the Sea (MoS) projects, that is, the development of integrated maritime-based intermodal transport infrastructure and service networks at European scale, have been the vision of the European Commission (EC) under the European Transport Policy White Paper 2001. Although these projects have been prioritised under the Trans European trans...

Planning pedestrian environments requires assumptions about how pedestrians will respond to characteristics of the walking environment in city centers. European city centers, especially medieval ones, have been more and more pedestrianized in the last two decades. Two major groups, shopkeepers and pedestrians profit from this enlargement of public...

This paper presents the design and deployment of an innovative and high standard school bus service developed for Lisbon. The design of the new service introduces an integrated procedure based on traditional formulations of the School bus routing problem, a Mixed Integer Linear Programming (MILP). The adopted solution divided the problem in two ste...

This paper focuses on the formulation of a Mixed Integer Linear Program (MILP) that was used in the design of a new alternative intermediate transport mode and examines the viability of its implementation on the Lisbon Metropolitan Area. Due to the high combinatorial nature of the problem, the modelling process was divided into four phases: estimat...

Establishing a European wide high-quality shipping links and integrating them with the trans-European Transport networks has been the vision of the European Commission (EC) to reduce land transport congestion under the Motorways of the Sea (MoS) concept. However, in spite of strong political backing and favourable policy initiatives, MoS projects h...

The viability of implementing a new alternative intermediate transport mode in the Lisbon, Portugal, metropolitan area was examined. The intention of this new system was to combine the major strengths of both public transport and private vehicles to provide a competitive transport alternative for commuters from low and intermediate density areas, w...

This paper introduces an Agent based modelling approach to model inter-urban freight transport between two or more trading regions. The use of the model is to ascertain the modal share of competing transport modes (road and intermodal) while taking complex transport service supply–demand dynamics into account. It is structured by modules describing...

Improved technological safety measures and regulation modifications as well as better education of road users have had considerable influence on reducing the number of accidents and fatalities. However, assessing the effect of measures has been straightforward and in particular there is not enough knowledge on the precise impact on road safety of t...

In this paper, a two-step approach for the evaluation of rail freight yard performance at a tactical management level, that could plausibly be used at both annual and weekly planning levels, is presented and discussed. The suggested approach involves analytical modelling with G/G/m queues and event-based simulations with SIMUL8 which is implemented...

The transport and energy sectors face multiple challenges including the accommodation of increasing fuel prices, energy security and environmental pressures, particularly in road transport where cars hold a large share of final energy consumption and emissions. Despite the diffusion of more efficient vehicles, air quality problems abound in urban a...

The yards are facilities that reassemble freight cars into freight trains. These facilities play an essential role for providing the freight transportation service by rail. However, they are non-revenue producing elements for the railway freight companies and therefore keeping them unutilized is not acceptable. In this paper, a double-ended flat-sh...

The increase of urban traffic congestion calls for studying alternative measures for mobility management, and one of these measures is carpooling. In theory, these systems could lead to great reductions in the use of private vehicles; however, in practice they have obtained limited success for two main reasons: the psychological barriers associated...

This paper includes a mesoscopic simulation modelling methodology developed for analysing and evaluating freight train operations in a rail network. The product of this methodology is a simulation rail network model implemented using an event-based simulation computer package called SIMUL 8. For simulation modelling purposes a decomposition approac...

PPP contracts most often have durations of between 20 and 35 years, but in some cases even longer. The main reason for this is the wish of the Public side to minimize its financial contribution, by including in the contract many years of revenue generation by the project to help cover the investment contribution of the private partner. Implicit how...

Increasing urban traffic congestion calls for the study of alternative measures. One such measure is carpooling, a system in which a person shares his private vehicle with one or more people in a commuter trip. In principle, this system could lead to potentially significant reductions in the use of private vehicles; however, in practice it has achi...

The transport sector faces multiple challenges including the accommodation of increasing fuel prices and environmental pressures. These hurdles become more important in road transport where cars hold a larger share of final energy consumption and emissions. Although not solved, the situation is improving in general and the question of accelerating...

When developing a new urban area, town and transport planners have to establish the type of transport infrastructure and service that best fits the particular site and its future inhabitants. However in the existing urban areas one does not have the advantage of a " blank sheet " start, several restrictions have to be faced if one is to manage mobi...

The increase of urban traffic congestion has called for the study of alternative forms of supply for mobility of people. One is carpooling, a system in which a person shares his private vehicle with one or more persons in commuter trips. In theory, these systems could lead to great reductions in the use of private vehicles; however, in practice the...

This paper presents a simulation procedure to assess the market potential for the implementation of a new shared taxi service in Lisbon. This study is part of a broader project which intends to define and simulate a set of new intermediate transport modes and services in this region in order to enhance urban mobility sustainability and improve acce...

The aim of this paper is to examine the relationship between the availability of transportation infrastructure and services and the pattern of house prices in an urban area and to assess whether public investment in transportation can modify residential property values. This study was developed for the Lisbon, Portugal, metropolitan area (LMA) as p...

This paper develops a comprehensive approach to the definition of transportation analysis zones (TAZ), and therein, presents a new methodology and algorithm for the definition of TAZ embedded in geographic information systems software, improves the base algorithm with several local algorithms, and comprehensively analyses the obtained results. The...

The transport sector faces multiple challenges, including increasing fuel prices and environmental pressures. These hurdles become more important in road transport, where cars hold a larger share of final energy consumption and emissions. Although not solved, the situation is generally improving, and the question of accelerating the transition to n...

Provided, in this paper, is a simulation modelling methodology for analysing and evaluating flat-shunted yard operations. Created and implemented is a yard simulation model using a computer package for event-based simulation, SIMUL’8. The main idea behind the simulation modelling approach is to simulate the flat-shunted yard operations dividing the...

Transportation analysis is typically thought of as one kind of spatial analysis. A major point of departure in understanding problems in transportation analysis is the recognition that spatial analysis has some limitations associated with the discretization of space. Among them, modifiable areal units and boundary problems are directly or indirectl...

Growing traffic congestion and the associated externalities require the study of alternative measures to reduce the number of automobiles travelling every day to the city centres, specifically single-occupant vehicles. Carpooling is a system by which a person shares his or her private vehicle with one or more people that have similar destinations....

This paper tries to build on traditional value capture measures, to estimate the potential of application of some of these mechanisms to the Lisbon subway, examining their ability to contribute to cover the financial costs of the system operation and development. The study will just focus on the municipality of Lisbon where this system mainly opera...

The aim of this paper is to examine the relationship between the availability of transportation infrastructure and services and the pattern of house prices in an urban area and to assess whether public investment in transportation can modify residential property values. This study was developed for the Lisbon, Portugal, metropolitan area (LMA) as p...

The workshop included presentations of nine papers covering very different types of situations and transitions. Some papers were region specific (Russia, Middle East, Asia, Europe, and two from Latin America) and others were of general applicability. The discussion highlights that virtually all cities and regions will go through one type of transit...

Terology is defined as the combined use of techniques of operational research, information systems and engineering, with the objective of accompanying the life cycle of facilities and equipments; it includes the definition of specifications referred to its purchase, installation and reception, as well as the management and control of its maintenanc...

Maintenance management is a subject that, instead of reducing importance with the increase of equipment reliability, it increases its role in the companies and obliges the increase of the level of demand of professionals involved because of the new technical and environmental demands. Sometimes, scientific developments anticipate the company's need...

Growing traffic congestion and the associated pressure in car parking, require the study of innovative measures to reduce the number of cars traveling every day to the city centers, specifically single occupant vehicles. Car pooling is a system by which a person shares his private vehicle with one or more people that have similar or aligned destina...

Despite the introduction of many instruments in the transport system, they failed to reach their target since gains in global environmental efficiency have not been enough to cope with the consequences of transport growth. The ultimate environmental challenge for transport policy makers is to improve the effectiveness of implementation of policy in...

Growing traffic congestion and the associated externalities, require the study of innovative measures to reduce the number of automobiles traveling every day to the city centers, specifically single occupant vehicles. Carpooling is a system by which a person shares his private vehicle with one or more people that have similar destinations. A new Si...

The Intermittent Bus Lane (IBL) concept is an innovative approach to achieve bus priority. It consists of a road lane in which the status of each section changes according to the presence or not of a bus in its spatial domain: when a bus is approaching an IBL, the status of that lane is changed to BUS lane, and after the bus moves out, it becomes o...

In most transport planning studies, one of the first steps is the definition of a zoning scheme into which the study area is divided and the corresponding space is discretized. There are no clear rules on how to carry out this operation in an optimal way, and the dominating practice is to proceed on the basis of experience, trying to mix a certain...

This paper presents the research that is being undertaken by the Transport Infrastructure and Systems Group of CESUR — IST, under the author’s leadership. There are three main research streams: Modelling and innovation in urban mobility management; Organization and technology as instruments for efficiency gains in large scale transport systems; and...

Traffic congestion and the associated pressure in car parking, that results from growing car ownership, require the study of innovative measures to reduce the number of cars traveling every day to the city centers, specifically single occupant vehicles. Car pooling is a system by which a person shares his private vehicle with one or more people tha...

This paper reports the design of a wireless system to be used for intelligent traffic control and also for law enforcement. The system is an upgrade of the one that implements the intermittent bus lane concept already installed and under performance evaluation.

This paper introduces the demonstration of a new bus priority measure, the Intermittent Bus Lane, in Lisbon. The situations around the chosen testing area, the arrangements and installations of the related signals, signs and other system equipment all have been shown. The detections and estimations of traffic flow and bus movements, and the control...

Traffic congestion and the associated pressure in car parking, that results from growing car ownership, require the study of innovative measures to reduce the number of cars traveling every day to the city centers, specifically single occupant vehicles. Car pooling is a system by which a person shares his private vehicle with one or more people tha...

Despite the introduction of political, technological and economic solutions in the transport system, gains in overall eco-efficiency haven't been enough to cope with the consequences of transport growth. The ultimate environmental challenge for transport policy makers is thus to improve the effectiveness of implementation of policy instruments, as...

The neighborhood of Campo de Ourique in Lisbon, Portugal, was evaluated for land use and transportation needs, and a proposal was made for a mobility plan. GeoMedia Professional, a fundamental part of the evaluation, was used to identify problems and opportunities at the neighborhood level and determine action areas and good practices. Methodology...

During the last decade Mobility Plans have been developed in many cities of the world. These studies evaluate the configuration of the current mobility status and develop some interventions in order to solve particular problems at a city scale, sometimes making use of legal instruments such as regulation. A Mobility Plan on a local scale intends to...

Transportation analysis is typically thought as one kind of spatial analysis. A major point of departure in understanding problems is the recognition that spatial analysis has some limitations and impediments. Among them, modifiable areal units and boundary problems are indirectly or directly related to transportation planning analysis through the...

Intermittent Bus Lane (IBL) used for bus priority is a lane in which the status of a given section changes according to the presence or not of a bus in its spatial domain: when a bus is approaching such a section, the status of that lane is changed to BUS lane, and after the bus moves out of the section, it becomes a normal lane again, open to gene...

Este artigo pretende fornecer uma abordagem inovadora referente ao suporte técnico prestado ao decisor político numa fase preliminar na definição de políticas de Mobilidade e Transportes. A possibilidade de adopção de técnicas do tipo SWOT (entre outras) permite a identificação de pontos de tensão e de janelas de oportunidade, com a qual é possível...

Nowadays Portugal is under a large process of creation/revision of studies and plans related with land use and territorial planning, mainly due to the end of the lifetime period of the actual Municipal Master Plan, but also because of the creation of the new Metropolitan Authorities of Transportation, which will require Mobility Plans. Even though...

This paper provides a survey on studies that analyze the macroeconomic effects of intellectual property rights (IPR). The first part of this paper introduces different patent policy instruments and reviews their effects on R&D and economic growth. This part also discusses the distortionary effects and distributional consequences of IPR protection a...

Transport policy may well have reached a turning point. New incentives, new pricing, and new instruments to better manage investment and demand are required. This publication outlines a number of strategic directions for transport policy in the coming years. It also contains a summary paper presented at the 87th ministerial session which also marke...

One of measures to improve the bus movements is to extend the green signal times or recall earlier the next green signal phase when a bus meet the red signals. In meantime, other traffic flow are also influenced. With the development of AVL technologies and the improvement of the prediction models of transit movement, the bus coming moments now can...

Urban Road Pricing has been proposed many times as a powerful instrument to fight congestion in urban traffic, but has systematically faced a hostile political envirionment, due to lack of confidence on its promised (traffic) results and fear of its political consequences. Lack of action in this front is contributing to stable or even growing conge...

In the search for improved flowing conditions for buses, many cities have introduced bus lanes and incorporated bus priority schemes in their traffic control systems. However, these two instruments are insufficient in themselves, since bus lanes are not justified with a low frequency of buses but without such lanes buses frequently have to travel i...

This paper develops an efficient algorithm for the computation of the shortest paths between given sets of points (origins and destinations) in the plane, when these paths are constrained not to cross any of a finite set of polygonal (open or closed) barriers. It is proved that when distances are measured by an 1p - norm with 1 < p < ∞, these paths...

RESUMO Este trabalho vem apresentar e discutir a proposta de um modelo de otimização das opções de transporte de soja, visando encontrar uma solução mais eficiente para o escoamento intermodal da soja produzida no Estado de Mato Grosso, de forma a minimizar o custo total de transporte e garantir que toda a produção seja escoada por um conjunto de c...

In the last decade studies have been developed concerning the implication of planning and transports on the quality of life of residential boroughs. Some of these studies are included under the name of "transit-friendly communities", "transit-oriented development", "traffic calming" and "livable communities", these analyze urban issues with the goa...

The market of interurban mobility to rural areas is one of the most challenging for Public Transport (PT). In Portugal it has been quite difficult for Public Transportation to establish itself in this market as an effective alternative to the use of private cars. Two of the main reasons for this are the low accessibility of long distance railway se...

Public investment in transportation infrastructure is under pressure due to the increasing financial needs for other social obligations of Governments. Public-private partnerships have been introduced in the transport sector, but public transport systems only very rarely generate sufficient profits to allow the reward of private investment. In the...

Th e transport sector faces multiple challenges including the accommodation of increasing fuel prices and environmental pressures. Th ese hurdles become more important in road trans-port where cars hold a larger share of fi nal energy consumption and emissions. Although not solved, the situation is improving in general and the question of accelerat...

For any kind of statistical analysis of trip matching algorithms, working on the samples of mobility surveys is hopeless as these typically cover not much more than 2% of travellers. The usual inference process works on a discrete representation of the territory (zones) and simply replace each trip in the sample by as many equal trips as the corres...