In December 2004, the route to Stolberg was re-opened up to the Alsdorf-Annapark station, with new stops in Herzogenrath-Alt Merkstein and Herzogenrath-August-Schmidt-Platz.

In 2007 and 2008, the platforms were reconstructed to a height of 76 cm, and in this process highly shortened, as only regional trains stopped here since the InterRegio service was discontinued.

Since December 13, 2009, some InterCity-trains on the routes Aachen – Berlin and Leipzig – Cologne link Herzogenrath with the German long-distance train network again.

Since 1985, operation is regulated by a relay signal box of type SpDrS600 with the code Hf (where the f stands for Fahrdienstleiter, German for train dispatcher), at the northern end of the station.

From 1915 to 1985, Herzogenrath station had a two mechanical signal boxes, besides Hf there was a second one, code Hs, at the southern end.