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Transdev CEAT

Transdev CEAT is a French public transport operator, a subsidiary of Transdev, running bus networks in the south-east of Île-de-France.

Last updated September 27, 2026

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Overview

Transdev CEAT, also known as CEA Transports or CEAT (Compagnie d'exploitation automobile et de transports), is a French public transport company headquartered in Sainte-Geneviève-des-Bois in the Essonne department. It operates bus networks in the south-east of the Île-de-France region, serving the Essonne, Val-de-Marne and Seine-et-Marne departments. The company is a subsidiary of the Transdev group, one of the world's leading private transport operators. The company was founded in 1934 by the French car manufacturer Renault under the name "Autocars Renault CEA". After briefly adopting the name "CNEA Uniroute" in 1963, it settled on the acronym CEA, standing for "Compagnie d'Exploitation Automobile". By the late 1930s it had become the leader of the French interurban transport market with a 30.5% market share. From 1990 until 2 March 2011, CEA Transports was a subsidiary of the Transdev group. On 3 March 2011, Transdev merged with Veolia Transport to form Veolia Transdev, which became the world's leading private transport operator. In March 2013, following the withdrawal of Veolia Environnement, the group adopted the name Transdev. CEA Transports operates mainly in the Essonne, Val-de-Marne and Seine-et-Marne departments. It has historically been established in the communes of Sainte-Geneviève-des-Bois, Boissy-le-Cutté, Ormesson-sur-Marne and Torcy, and works with eight local authorities, providing transport services for a catchment area of more than 190,000 inhabitants. Since 1 January 2012, all SITUS vehicles previously stationed at the post-war depot in Ormesson-sur-Marne have been transferred to a modern bus centre of just over 10,000 m² in the industrial zone next to the RN 4 in Pontault-Combault. Since 2 March 2015, all vehicles of line 421 stationed at Torcy station have also moved to the Pontault-Combault bus centre. In July 2019, the company acquired Cars Perron in Pussay (Essonne), integrating its depot, drivers and vehicles into CEAT, thereby inheriting numerous school routes in southern Essonne (Angerville, Pussay, Méréville, etc.), rotations on line 4450 (Dourdan RER station ↔ Étampes RER station) of the Albatrans network, and the Dourdan urban network with line 85-01. The company has undergone numerous network restructurings, including the renumbering of lines on 2 January 2014, the splitting of line 107 in March 2014, modifications to lines 102A, 102B and 10.12 in September 2017, the second phase of the SITUS network restructuring in January 2018, the restructuring of the Val d'Essonne network in December 2018, and changes to lines 221 and 222 in November 2019. The company is also subject to the opening up of public transport markets to competition in the Île-de-France region.

History

The company was founded in 1934 by the French car manufacturer Renault under the name "Autocars Renault CEA". After abandoning the name "CNEA Uniroute" (N for nouvelle) adopted in 1963, it resorted to the acronym CEA, meaning "Compagnie d'Exploitation Automobile". By the end of the 1930s, it had become the leader of the French interurban transport market with a 30.5% market share. From 1990 until 2 March 2011, CEA Transports was a subsidiary of the Transdev group. On 3 March 2011, Transdev, which managed the company, merged with Veolia Transport, then a subsidiary of Veolia Environnement, to create "Veolia Transdev", which became the world's leading private operator in the transport sector. Two years later, in March 2013, the group, burdened by debts of several million euros, adopted the name Transdev following the withdrawal of Veolia Environnement, the owner of Veolia Transport. CEA Transports operates mainly in the Essonne, Val-de-Marne and Seine-et-Marne departments. Historically established in the communes of Sainte-Geneviève-des-Bois, Boissy-le-Cutté, Ormesson-sur-Marne and Torcy, CEA Transports works in collaboration with eight local authorities, providing transport services for a catchment area of more than 190,000 inhabitants. Since 1 January 2012, all SITUS vehicles stationed at the post-war depot in Ormesson-sur-Marne have been transferred to a modern bus centre of just over 10,000 m² in the industrial zone next to the RN 4 in Pontault-Combault. Since 2 March 2015, all vehicles of line 421 stationed at Torcy station have joined the Pontault-Combault bus centre. In July 2019, the company acquired Cars Perron in Pussay (Essonne); the depot, drivers and vehicles were integrated into CEAT, which thus inherited numerous school routes in southern Essonne (Angerville, Pussay, Méréville, etc.), rotations on line 4450 (Dourdan RER station ↔ Étampes RER station) of the Albatrans network, and the Dourdan urban network with line 85-01. The history of the bus lines and networks includes several restructurings. On 2 January 2014, certain lines of the bus network were renumbered. On 3 March 2014, line 107 was split into line 108, which took over the service between Z.I Croix Blanche and Porte d'Orléans, while line 107 linked Z.I Croix Blanche to Massy - Palaiseau station. On the same date, line 107 abandoned the service between Z.I Croix Blanche and Fleury-Mérogis prison, which was thereafter served only by line 109. As compensation, a few weeks later line 510 was extended to Z.I Croix Blanche. On 4 September 2017, lines 102A, 102B and 10.12 were modified: line 102A merged with line 18.11A of the Transdev Brétigny establishment under the index 101 and its service was strengthened to guarantee school transport; line 102B was renumbered as 102; line 10.12 was renumbered as 104. On 8 January 2018, the second phase of the restructuring of the SITUS network began: line 2 was strengthened in the evening on weekdays between 19:00 and 19:30 with a bus every ten minutes; line 7 abandoned its section between Émerainville - Pontault-Combault station and Les 4 Chênes shopping centre, and was strengthened Monday to Friday at peak hours with a bus every ten minutes, every fifteen minutes off-peak and every twenty minutes at weekends; line 8 had all its runs extended to the Pince-Vent shopping centre in La Queue-en-Brie and took over the service of Champlain high school from line 9; line 9 was withdrawn and partly taken over by lines 8 and 10; line 10 followed a simpler and more direct route, abandoning the Triangle des Cantoux service, and its terminus was moved to the Pince-Vent shopping centre, with frequencies strengthened to a bus every ten minutes Monday to Friday at peak hours, every thirty minutes off-peak and on Saturdays, and a new service on Sundays and public holidays. On the same date, line 107 was strengthened with a bus every ten minutes at peak hours, every twenty minutes on Saturday afternoons and every thirty minutes on Sundays and public holidays. On 10 December 2018, following the introduction of the 2019 service plan on RER D, the Val d'Essonne network was restructured: lines 201 and 204 merged, extending line 201 to Collège Doisneau via le Domaine with a bus every 15 minutes at peak hours; line 205 abandoned its circular route and was extended to Vayres-sur-Essonne via La Ferté-Alais station, its former route through Itteville being maintained by lines 206A and 206B. On 4 November 2019, at the request of local authorities, line 221 linked the communes of Ballancourt-sur-Essonne and Itteville to Alexandre Denis high school in Cerny; its former service was taken over by line 222, which also underwent a route change. The company is also subject to the opening up to competition of public transport in the Île-de-France region.

  • 2019

    In July, acquired Cars Perron in Pussay; on 4 November, lines 221 and 222 modified.

  • 2018

    On 8 January, second phase of SITUS network restructuring; on 10 December, Val d'Essonne network restructured.

  • 2017

    On 4 September, lines 102A, 102B and 10.12 modified.

  • 2015

    On 2 March, all line 421 vehicles moved to Pontault-Combault bus centre.

  • 2014

    On 2 January, certain bus lines renumbered; on 3 March, line 107 split into 107 and 108.

  • 2013

    In March, the group adopted the name Transdev after Veolia Environnement's withdrawal.

  • 2012

    On 1 January, SITUS vehicles transferred to a new bus centre in Pontault-Combault.

  • 2011

    On 3 March, Transdev merged with Veolia Transport to form Veolia Transdev.

  • 1990

    Became a subsidiary of the Transdev group.

  • 1963

    Adopted the name "CNEA Uniroute" (later abandoned).

Products and positioning

A regional public transport operator within the Transdev group, providing essential mobility services in the south-east of Île-de-France.

  • SITUS bus network

    Bus network serving the SITUS area.

  • Val d'Essonne bus network

    Bus network in the Val d'Essonne area.

  • Albatrans network (line 4450)

    Interurban line between Dourdan RER station and Étampes RER station.

  • Dourdan urban network (line 85-01)

    Urban bus line in Dourdan.

Sources3 sources

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