Article: NDTAC bonus for RUs that use quiet freight wagons
With the introduction of noise-differentiated track access charges (NDTAC), DB Netz AG is creating incentives for the use of quiet freight wagons.

Timeline
In the interest of local residents and the environment, Deutsche Bahn has set itself the goal of significantly and permanently reducing train noise by 2020. A universal effect is achieved by reducing noise directly on wagons. With the incentives from the NDTAC, DB Netz AG is therefore promoting the upgrading of existing freight wagons to low-noise brake technologies.
After 8 years, the NDTAC expired on December 12, 2020. The railway noise mitigation act has been implemented as a follow-up to NDTAC since December 13, 2020.