PhD student in political science, focusing on the study of public transport policy-making, with a particular emphasis on understanding the role of expertise.
Understanding the Development of Free Public Transport in France
Thesis title:
The Impossible in the Making of a Non-Solution
Trajectories of Free Public Transport in France, in Montpellier and in Paris/Île-de-France
Thesis Supervisor: Philippe Zittoun
PhD Thesis Defense – September 15, 2026, at ENTPE
The thesis aims to understand the dynamics behind the development of completely free public transport in France, amidst significant opposition from experts. Despite growing opposition from various transport interest groups and experts, the policy has been expanding to cover increasingly larger areas (Aubagne in 2009, Dunkirk in 2018, and Montpellier in 2023).
The research seeks to comprehend the experts’ opposition to free public transport and its consequences on both the defense and implementation of the policy. The methodology involves a detailed study of the local trajectories of free public transport in various cities (Montpellier, Paris, and Lyon). This includes extensive press reviews and grey literature analyses, followed by interviews with key actors involved in public policy-making.
This approach complements existing research on the effectiveness of free public transport, particularly studies conducted at LAET.
Abstract:
While political science has long focused on the construction of public problems, more recent work has examined the making of policy solutions (Zittoun et al. 2021) and non-problems (Henry 2021). This dissertation extends these perspectives by studying the making of non-solutions, understood as the processes through which certain policy solutions are kept at a distance from legitimate public action.
The dissertation draws on the case of free public transport in France. This measure has gained increasing visibility in electoral, media and professional debates, particularly during municipal elections. Yet it remains marginal within urban transport networks, often confined to small and medium-sized systems where fare revenues are limited
This restricted development contrasts with the intensity of the criticism it generates within the transport sector. Representatives of transport authorities, operators, user associations and professional organizations converge in disqualifying the measure. Why does free public transport generate such intense critical mobilization, to the point of being described as ”impossible”, even though it remains marginal within urban transport networks?
To answer this question, the dissertation is situated within a sociology of public policy that pays particular attention to the role of expertise, policy communities and evaluative instruments in the definition of legitimate solutions.
The dissertation combines two levels of analysis. At the national level, it brings together a historical analysis of the development of free public transport in France, a prosopographical analysis of local transport executives, and a study of reports, position papers and public arguments produced on the measure.
It shows that transport actors share categories of analysis, professional norms and evaluative instruments, shaped through their social, educational and professional trajectories. They thereby form a policy community that constructs full free public transport as an impossible solution.
At the local level, the dissertation is based on two process-tracing analyses, drawing on a media corpus, official documents, gray literature and semi-structured interviews. The case of Paris and Île-de-France shows how the transport policy community mobilizes to prevent full free public transport from becoming established as a legitimate solution. It also shows that certain forms of free public transport can be made possible when they are embedded in other policy sectors, particularly social or environmental policies. By contrast, the Montpellier case shows how free public transport was progressively constructed as an instrument for winning and exercising local power. Montpellier’s elected officials engaged in political work of legitimation in order to make the measure possible, despite the persistent reservations of some transport actors.
A first, technical register constructs the measure as infeasible, particularly in financial terms. A second, economic register constructs it as ineffective, mainly through the argument that free public transport would produce a modal shift away from cycling and walking rather than away from the car. A third, normative register constructs it as inadmissible, especially by associating the absence of a fare with a devaluation of the public service, captured in the saying that ”what is free has no value”.
More broadly, this dissertation calls for greater attention to the making of non-solutions in the analysis of public policy.
Keywords:
Non-solution
Public policy
Free public transport
Impossible solution
Expertise
Transport
2026 | Mettre en œuvre ou résister : les actrices et acteurs du transport face à la gratuité des transports en commun
Journée des recherches en cours du collectif Études Pluridisciplinaire Sur l’Ingénierie (Paris, France, 26 août 2026).
2026 | Performing Policy Impossibility – Agency and Expertise in Free Public Transport in France
International Workshop on Public Policy (Ottawa, Canada, juillet 2026).
2026 | Tarification et gratuité des transports en commun : valeurs invisibles et cadrages techniques de l’action publique (avec Merlin Gillard)
Rencontres Francophones Transports Mobilité, Hammamet, Tunisie
2026 | Gouverner avec et contre l’expertise La gratuité des transports en commun et les reconfigurations du pouvoir urbain à Montpellier
Séminaire Qui gouverne la ville ?, avr 2026, Liège, Belgique
2026 | La gratuité des transports en commun comme enjeu politique : la mise à l’agenda de la gratuité des transports en commun
Doctorales Du LAET, avr 2026, Lyon, France
2026 | The Impossible in the Policy Process: Expertise and the Rejection of Free Public Transport in the Paris Region (France)
Conference On Policy Process Research, jan 2026, Berne, Suisse
2025 | Impossibiliser une solution, le rôle des trajectoires et des réseaux professionnels dans l’opposition à la gratuité totale des transports en commun en France
Doctoriales du laboratoire Arènes, oct 2025, Rennes, France
2025 | When expertise shapes the boundaries of the governable: the political work of transport experts on free public transport in France
European Group for Public Administration, aou 2025, Glasgow, Ecosse
2025 | Framing impossible solutions: elements for a theoretical proposition based on the case of free public transport in France
International Conference on Public Policy, jul 2025, Chiang Mai, Thailand
2025 | L’impossible gratuité des transports
Rencontres Francophones Transport Mobilité, jun 2025, Dunkerque, France
2025 | Quand la gratuité des transports en commun est imposée : Du choc à la mise en œuvre d’une politique publique contestée
Doctoriales du LIPHA, Laboratoire Interdisciplinaire du Politique Hannah Arendt, Jun 2025, Fontainebleau, France.
2025 | L’impossibilité contestée : Processus de dé·légitimation de la gratuité des transports en commun (Poster)
Doctorales du LAET, Laboratoire Aménagement Économie Transports, Apr 2025, Lyon (Maison des Sciences de l’Homme), France
2025 | Les obstacles à la gratuité totale des transports en commun : comprendre les résistances et adaptations
Doctorales du LAET, Laboratoire Aménagement Économie Transports, Apr 2025, Lyon (Maison des Sciences de l’Homme), France
2024 | Rôle des connaissances et des conseils dans la fabrique de la gratuité des transports à Montpellier
International Workshop on Public Policy – International Public Policy Association, Guadalajara (Mexico)
2024 | Communauté de politiques publiques du transport et trajectoire de la gratuité des transports à Montpellier
International Winter School on Public Policy – International Public Policy Association, Alps (France)
2024 | Trajectoire de la gratuité des transports en commun en France
Séminaire interdoctorant·e·s – École Nationale des Travaux Publics de l’État, Lyon (France)
2023 | Présentation de la trajectoire de la gratuité des transports en commun à Lyon
International Winter School on Public Policy – International Public Policy Association, Alps (France)
2026 | Panel : Gouverner les politiques publiques de transport et de mobilité, Représentation, arbitrages et conflits dans l’action publique
Félicien Boiron et Antoine Lévêque
Rencontres Francophones Transport Mobilité, Hammamet, Tunisie
2025 | Panel : Mobility & transport: new concerns arising from the politics in public policy
Félicien Boiron et Everardo Chiapa
International Conference on Public Policy, Chiang-Mai, Thaïlande
2025 | Panel : Gratuités des transports en commun : des objectifs et des enjeux multidimensionnels
Félicien Boiron, Quentin David, Marion Le Texier, Philippe Poinsot, et Jean-Clément Ullès
Rencontres Francophones Transport Mobilité, Dunkerque, France
2023 – 2024 | Co-organisateur du Séminaire interdoctorant·es
Laboratoire Aménagement Économie des Transports, Lyon
2019 – 2022 et 2023 – 2026 | Membre du Conseil d’Administration
École Nationale des Travaux Publics de l’État, Lyon (France)
2023 – 2025 | Volontaire
International Public Policy Association
International Conference on Public Policy, 6th edition in Toronto (Canada)
International Workshop on Public Policy, 4th edition in Guadalajara (Mexico)
International Conference on Public Policy, 7th edition Chiang Mai (Thaïlande)
2024 – … | M1 | 3 h
Intervenant : Analyses mixtes pour comprendre et modéliser les mobilités
Introduction à l’analyse processuelle des politiques publiques. Exercices sur des articles de presse et entretiens.
École Nationale des Travaux Publics de l’État, Lyon (France)
2023 – … | L3 | 2 x 27 h/an Chargé de TD : Initiation aux Sciences sociales et à la Science politique
Accompagnement des étudiants dans l’étude de la production scientifique et de l’argumentation scientifique, dans l’identification et l’analyse des acteurs d’une controverse et dans l’étude de la trajectoire d’une controverse
École Nationale des Travaux Publics de l’État, Lyon (France)
2024 – … | M2 | 3 h Intervenant : Les grands enjeux de la transition écologique
Présentation de mes travaux avec un accent sur la méthodologie. Réalisation d’exercices pour établir une méthodologie et pour expérimenter les méthodologies choisies.
École Nationale des Travaux Publics de l’État, Lyon (France)
2023 | M1 | 2 x 9 h Enseignant : Séminaire retour de stage
Accompagnement dans l’analyse sociologique des organisations d’accueil des stagiaires.
École Nationale des Travaux Publics de l’État, Lyon (France)
2025 | M2 | Jury d’un mémoire
Jury d’un mémoire ENTPE-IEPG
Laboratoire Aménagement Économie des Transports, Lyon (France)
2025 | Encadrement de mémoires professionnels
Supervision de la réalisation de deux mémoires du Graduate Programme Management opérationnel des transports ENTPE-Transdev
Laboratoire Aménagement Économie des Transports, Lyon (France)
2024 | M2 | Encadrement d’un mémoire
Supervision de la réalisation d’un mémoire (sélection du terrain, méthode, réaction, etc.)
Laboratoire Aménagement Économie des Transports, Lyon
IdHAL : felicien-boiron
ORCID : 0009-0006-6633-9834
Google Scholar : https://scholar.google.com/citations…
LAET – ENTPE
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