In the night all trains stopped. No train drove in all of Germany. S-Bahn trains also stopped. Private trains also stopped. The reason is a problem with the radio. The radio name is GSM-R. It is important for safety.
The problem lasted 90 minutes. IT-Techniker fixed the problem fast. They changed one part. This part was broken. A backup system helped. First trains drove after midnight. On Wednesday morning many trains were late.
Thousands of people waited at stations. In Gelsenkirchen many fans waited after a concert. In Hamburg and Augsburg there was trouble. The company gave money for taxis and hotels. Many hotels were full. The traffic minister checks the problem now.