Toulouse Aerospace Express, as the line is known, would interchange with metro Line A at Marengo SNCF and with Line B at Fran\u00e7ois 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, Lab\u00e8ge and Malepere.\r\nTwo-thirds of the line, principally through the centre of Toulouse, would be underground. The cost of the project is estimated at \u20ac1.72bn which equates to a cost\/km of between \u20ac80m and \u20ac90m.\r\nA 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.