Toulouse Aerospace Express, as the line is known, would interchange with metro Line A at Marengo SNCF and with Line B at François Verdier et La Vache. It would also connect with the Envol tram line, and with a planned cable car line in Montaudran. There are options for extensions totalling 8km serving Toulouse Blagnac Airport, Labège and Malepere.

Two-thirds of the line, principally through the centre of Toulouse, would be underground. The cost of the project is estimated at €1.72bn which equates to a cost/km of between €80m and €90m.

A timetable has been agreed for the implementation of the project. Preliminary studies and adoption of the final route will be completed by 2018, followed by a public enquiry, with the aim of starting construction in 2019. It is planned to open the line in 2024, and it is expected to carry 200,000 passengers a year.