[4] Additional project objectives were to accompany the evolution and development of a fast-changing suburban environment, the encouragement of sustainable mobility, better links between existing transit infrastructures and the refiguration of roads and public spaces (introduction of bike lines along the tram alignment, more accessible walking paths, etc.).

[5][6] The line's operations and maintenance contract is subject to competitive tendering by Île-de-France Mobilités (IDFM).

In May 2018, IDFM issued a concession notice for operations and maintenance of Line 9 including seven bus lines of the local "Bord de l'Eau" bus network for a period of 66 months (i.e. for only 5½ years), calling for potential candidates to submit a request for qualification.

[7] IDFM allowed four candidates to bid: RATP Dev, Keolis, Transdev, and outsider Moventia of Spain.

[8] On 14 June 2019 IDFM announced Keolis as the preferred bidder for T9 and the "Bord de l'Eau" bus network.