Environmental measures

• In February 2025, DB Regional launched a pilot project together with a partner from the fields of exhaust technology, thermal management and vehicle electronics to test alternative refrigerants No. 155. The measure is a forward-looking response to more stringent EU requirements: from 2031, it will no longer be permitted to use the refrigerant R134a in new vehicles. At the same time, the regulations provide for a gradual reduction in fluorine-based refrigerants for existing vehicles in the coming years. To date, there is no technical option for operating buses with fossil fuel drive technologies using more climate-friendly alternative refrigerants such as propane gas or CO₂. The aim of the joint pilot project is to develop an applicable, more climate-friendly and economical solution for the new and existing vehicle fleet.