The 3rd line through the south is definitely the railway line to Krefeld and Mönchengladbach. This crosses the River Rhine after which splits into the principle line as well as a department to Moers and Xanten at Rheinhausen. North on the station, 7 tracks run to your River Ruhr crossing https://weisheitsnews.de/die-rolle-von-sanitatshausern-bei-der-unterstutzung-der-hauslichen-pflege-in-duisburg/