The initial 6.4km section of the route will link the city's main station and Place de l'Étoile in the city centre with the LuxExpo exhibition centre in the district of Kirchberg, and is expected to open in 2017. Subsequent phases will extend the line south to Cloche d'Or and east to Luxembourg Findel Airport, giving the line a total length of 16km.

The budget for the 14-station initial phase is estimated to be around €230.5m and the Luxembourg national government is expected to meet two thirds of the cost, with the remaining funds being provided by the City of Luxembourg.