In Germany trains had a big problem. The radio for trains was broken. The system is called GSM-R. It keeps the trains safe.
Train drivers talk to control centers with this radio. Without radio the trains stay still. All trains stopped at the stations.
The trouble started on Tuesday night. Long trains and local trains were affected. S-Bahn trains in Berlin and Stuttgart also stopped.
Thousands of people could not go home. Many travelers waited at the train stations. The train company gave out vouchers for taxis.
Some people slept on the trains. In Gelsenkirchen many fans waited after a show. In Hamburg many people stood in long lines.
Technicians looked for the error at night. They used a Not-System later. After 90 minutes the trains moved again.
A computer update likely caused the error. The company checks this now. It was a technical problem.
On Wednesday morning the trains started slowly. But there were still many delays. Some trains did not run.
