Overview
- The tunnel is closed in both directions nightly through Friday, roughly 21:30–05:45, between Reichpietschufer and Heidestraße, with bus lines M41 and M85 unable to run full routes.
- Officials attribute the closures to safety concerns because continuous monitoring cannot be guaranteed, with additional brief shutdowns triggered by ice.
- Regulations require tunnels longer than 400 meters to be overseen from a permanently staffed post, placing the Tiergartentunnel under strict monitoring rules.
- Berlin’s Tempelhof monitoring center is hardware-ready but understaffed, with six operator posts filled yet one new hire still in training, leaving no cover for sickness-related absences.
- The federal Autobahngesellschaft continues limited weekend monitoring support as Berlin recruits and negotiates BVG secondments ahead of a July 1, 2026 handover.