The aim of the Diabolo project is to make Brussels Airport a fully-integrated part of the national rail network and allow access to high-speed trains such as Amsterdam-Brussels-Paris and NS Hispeed trains to serve the Airport.
The project involves the extension of the existing railway platform, a new 300m cross-over chamber and two 7.3m diameter single-track bored tunnels extending beneath the airport runway and just under 3km of track.
INPP holds a 100% stake in the project to build and finance the airport section over a five-year period and operate for a further 35 years.
The project receives a combination of fixed availability income, paid by the Belgian railway infrastructure provider Infrabel NV and non-fixed price passenger based income, paid by Belgian railway operator NMBS NV.
Project capital cost