A 6-month trial of on-demand bus services was carried out from March to August 2018 by Île-de-France Mobilités (IDFM) in the outer suburbs.

The service, which operated from 2200 at night, enabled passengers to alight between 2 bus stops, reducing the need to walk to their intended destination as well as to combat gender-based harassment in public transportation.

Due to its positive feedback, IDFM had authorised Transdev to extend the trial to 50 other routes in Île-de-France in 2019.

[2][3][4][5] TRA operates 22 numbered routes from 602 to 644 mainly in the department of Seine-Saint-Denis, and to a smaller extent, Seine-et-Marne.

[6] These routes have a higher frequency as well as longer operating hours to serve the dense urban areas of Île-de-France to provide an alternative to cars in the suburbs.