As of 15 February 2009 Düsseldorf has a green zone. Since that time cars with an emissions decal only are allowed to enter the intra-urban area.
Good for environment. Travel by train from 99,- € convenient to PSI 2013 of Reed Exhibitions Deutschland GmbH. In cooperation with Reed Exhibitions Deutschland GmbH and Deutsche Bahn you travel safely and conveniently to PSI 2013 in Düsseldorf! By using the train for your journey you contribute to saving the environment.