From Deutsche welle:

Germany’s most populous state became the latest to be hit by a warning strike by public servants on Wednesday. The ver.di trade union is demanding a 6.5 raise for its members.

Warning strikes by public sector workers continued into a third day on Wednesday, hitting Germany’s most populous state, North Rhine-Westphalia, for the first time.

Most of the buses, trams and subway trains remained in their depots in several cities, including the state capital, Dusseldorf, as well as Cologne, Bonn, and Bochum, forcing many commuters who usually take public transport to work to take their cars.