Gaele Lesteven

École Nationale des Travaux Publics de l'État | ENTPE

In sub-Saharan Africa (SSA), motorcycles play a major role in daily mobility and access to the city, as well as in the local economy. Walking remains the most common mode of daily travel but it does not provide city-wide mobility. Given the cost of the car and the marginal role of the bicycle, the motorcycle is the main alternative to conventional...

West African cities are undergoing rapid demographic growth and spatial expansion. The satisfaction of essential needs depends on everyday mobility and the conditions under which it is performed. The majority of the population relies on walking and public transport (PT) services, whether formal or informal. Based on a study conducted in Dakar, Sene...

Le gouvernement rwandais mène depuis le début des années 2010 une politique volontariste de modernisation de l’offre en transports en commun dans la capitale du Rwanda, Kigali. À partir d’un travail de terrain mené en 2019, la note analyse le rôle du numérique dans cette transformation. Elle conclut à une réforme en profondeur du secteur des transp...

This study examines the impact of the Covid-19 pandemic on the mobility system in Tehran, Iran, and provides lessons and insights to enhance readiness for similar circumstances in the future. Two cross-sectional surveys were conducted in Tehran, before and towards the end of the pandemic. The study utilizes descriptive analyses and econometric mode...

The Covid-19 pandemic had a significant impact on people's travel behaviour and their perception of various transportation modes. This paper presents the results of two cross-sectional surveys conducted in Tehran, Iran, during and after the pandemic. Multivariate ordered logit modelling is used to identify factors that influence usage and to explor...

Ce chapitre dresse un panorama de la mobilité urbaine à travers le monde. Après une définition des systèmes de mobilité urbaine et de leurs caractéristiques, il présente un état de la mobilité quotidienne à l’échelle mondiale. Il passe en revue l'usage des différents modes de transport et leurs articulations avec les aménagements urbains et les pol...

Cet ouvrage examine l’organisation géographique des systèmes de mobilité urbaine à travers le monde. Le terme « système » fait référence aux réseaux d’infrastructure, aux services de transport existants et aux pratiques de déplacement des populations. S’inscrivant dans une démarche comparatiste, cet ouvrage met en avant la diversité géographique de...

This study examines the daily mobility practices of urban residents in major African cities focusing on the case study of Dakar, Senegal. With population growth, urban sprawl, inadequate public transportation options, and limited motorized means among households, everyday travel proves to be both costly and difficult for many sub-Saharan African ci...

En Afrique subsaharienne, les études académiques sur les mouvements locaux de marchandises sont rares, et les transports locaux de fret sont quasi-absents des processus de planification urbaine. Ils sont pourtant au cœur du fonctionnement des économies urbaines. Les raisons de ce relatif désintérêt sont diverses. Parmi celles-ci, notons le fait que...

Cet article paru dans la revue Géotransports analyse les dynamiques de diffusion de la moto en Afrique subsaharienne. Dans des contextes où la marche à pied est le mode le plus utilisé, accéder à une moto élargit l’accès aux ressources urbaines. La diffusion du mode se fait à la fois par l’équipement des ménages en motos pour leur utilisation perso...

Background: This study addresses the mobility practices of the inhabitants of the peripheries of Dakar and the transport services they use to meet their mobility needs, in particular the unlicensed shared taxis (“Clandos”). In the peripheries, which suffer from a lack of jobs and amenities, mobility is essential to meet household needs and for soci...

Experiments with autonomous vehicles continue to proliferate. And yet, their broader public profile remains low. Commissioned by the French Ministry for Transport, this research examines the image of autonomous vehicles with the public at large. The methodology employed includes a thorough review of the French media discourse, in order to analyse t...

In the last decade, ride-hailing services have spread all over the world. While these technology-enabled services account for a small part of the modal split in many Western cities, the situation is different in the developing world, where many people use ride-hailing on a daily basis. To better understand the role of ride-hailing in the mobility s...

In the last decade, ride-hailing services and especially Uber – the most famous of them – have created a stir in urban mobility and its governance. Much has been written in the media, but not much of this media coverage has been analysed in the academic literature. The purpose of this paper is to understand the representations tied to Uber's arriva...

This research examines the history of transportation planning in African cities and how paratransit has been taken into account in the production of planning documents. On the rise since the 1980s, paratransit today is the most common motorized transportation mode in many African cities. The dominant approach among policymakers has been to limit pa...

Urban growth and the development of metropolitan areas are global challenging phenomena putting pressure on the development of transportation systems. In developing countries, its effects are often amplified by exponential growth and limited existing public infrastructures. Therefore, metropolitan growth is strongly linked with private motor vehicl...

Based on mobile ICT, in particular the smartphone, transportation network companies (TNCs) provide applications to link drivers and their personal vehicles to passengers. Operating in more than 700 cities across the world, Uber is one of the most popular TNCs. In many cities, its development is controversial as taxi drivers accuse it of unfair comp...

In the urban settings of developed countries, the Private Car (PC) constitutes by far the main mode of passenger mobility for the trips above some hundred meters, since it is quick, readily available and comfortable, at moderate costs to its users. The main alternative for trips above some kilometers consists in Passenger Transit (PT) modes, from B...

This meta-observatory of mobility assesses mobility around the world, at the dual scales of both countries and major cities. Using data collected from observatories and other sources, specific analytical methods have been developed that lie at the intersection between the geographical analysis of mobility and territorial statistics. These methods a...

Electric vehicles (EV) bring benefits for the urban environment but represent an additional cost for households. That is why the spread of electromobility starts with niche markets appropriate to their territorial context. On this principle, we design a business model for an EV sharing scheme based on assumptions about sites attractive to tourists...

This chapter focuses on the impacts of traffic congestion in the daily life of metropolitan motorized households. It is based on a doctoral dissertation defended in 2012, which studied three megacities: Paris in France, Sao Paulo in Brazil and Mumbai in India. A stated-adaptation survey was conducted in 2009–2010 to identify behavioral responses to...

This paper focuses on the daily routine of motorized households facing traffic congestion. Traffic congestion decreases travel speed and modifies daily travel times. An Interactive Stated Response Survey (ISRS) followed by a questionnaire was held in 2010 in the Paris region. The aim was to identify and understand behavioral responses to traffic co...

Depuis une trentaine d’annees, les critiques de l’acceleration se couplent d’une valorisation de la lenteur. Ces thematiques sont plutot le domaine de sociologues ou de philosophes et font rarement l’objet d’une approche spatiale, meme si les geographes s’interessent de plus en plus aux questions temporelles. S’interesser a la lenteur conduit a men...

This paper focuses on the daily routine of motorized households facing traffic congestion. Traffic congestion decreases travel speed and modifies daily travel times. An Interactive Stated Response Survey (ISRS) followed by a questionnaire was held in 2010 in the Paris region. The aim was to identify and understand behavioral responses to traffic co...

This PhD research studies the impact of traffic congestion in the daily life of metropolitan motorized households. Traffic congestion is defined as an internal perturbation of the automobile-based system. Adopting a systemic and comparative approach, we diagnose social, spatial and temporal characteristics of traffic congestion in the Paris region...

This PhD dissertation studies the impact of traffic congestion in the daily life of metropolitan motorized households. Is traffic congestion worse in mega cities of developing countries? Could it be the future of the Paris region, given its slow growth of road infrastructure and its multiplication of car travels in the suburbs? Traffic congestion i...

This paper presents household behavioral responses to traffic congestion in two major cities, Sao Paulo and Paris. An inter- active stated response survey (simulation game) was conducted in Sao Paulo (2009) and Paris (2010) to identify and understand house- hold choice process when facing both recurrent congestion (longer travel times) and non-recu...