The project consists of evolving line 12 to make it a real bus with a high level of service LIANE 5 that will connect Haubourdin to Marcq-en-Baroeul via Loos, Lille and Madeleine, a route of 15.42 km. The work will allow users to save significant time of approximately 13 minutes per service with an improved commercial speed of 2.0 km/h and a frequency shift in point hour from 8 to 6 minutes. The liana 5 will be representative of the 2nd generation LIANES: ascents and descents through all doors; abolition of on-board sales; integration of a 4th door on buses to facilitate climbs and descents. The arrangements for the first phase of works concern the municipalities of Haubourdin, Loos, Lille and La Madeleine. Further developments are planned between 2019 and 2023 in the Faubourg district of Béthune in Lille as well as in the Vauban-Esquermes district.