The rail line between Heerlen and Landgraaf was also doubled in 2021 and 2022. The goal for 2023 is to have a train running between Maastricht and Aachen two times per hour. Proposals have been submitted for an Intercity connection between Eindhoven and Aachen using the infrastructure that has already been built.
electrification of the landgraaf herzogenrath line
Two stretches of 15 kilometres on the route between Heerlen and Landgraaf and Herzogenrath/Aachen have been electrified in 2018, and an electric train began service between Maastricht and Aachen in February 2019. This makes a major bottleneck between Heerlen and Aachen a thing of the past.