Construction work in the Harz: Restrictions for drivers and hikers!

Construction work in the Harz: Restrictions for drivers and hikers!

Extensive construction work is currently underway in the Harz Mountains, which poses challenges for both drivers and hikers. On the B242, which runs between Sonnenberg and the B4 junction, the roadways are being renewed by the Lower Saxony State Authority for Road Construction and Transport (NLStBV). Construction work has been underway for several weeks and how news38 reported, the first section of the renovation from Sonnenberg to the Oderteich car park was successfully completed after five weeks. The planned work on the second section, which extends to the B4, began on August 13, 2025 and is expected to take around seven weeks.

For drivers, this means that they have to expect diversions and new traffic routes. The diversion takes place via Altenau and Torfhaus; The traffic from Clausthal is routed via Dammhaus and the B498 to Altenau, and then continues on the L504 in the direction of Torfhaus to the B4. The traffic lights in Sonnenberg will also be dismantled, but the parking lot at the Oderteich will remain accessible.

Renovation measures at the Innerste Dam

In addition to the road construction work, renovation work has also been underway at the Innerste Dam since August 18th. This work was necessary to ensure the tightness of the dam and to prevent minor damage to the asphalt concrete surface. The top of the dam is expected to be closed to visitors until the beginning of October, which means that the road over the dam will also remain closed during the entire construction period. Hikers and cyclists in the area should be prepared for detours, which may also include stairs, as the Harzwasserwerke emphasize in their statement: harzwasserwerke.de.

The aim of the renovation work is to protect the dam from external influences such as solar radiation and temperature fluctuations in order to ensure its long-term stability. There are also signs here to show hikers and cyclists how to navigate safely.

More road construction sites in the Harz

But it's not just the places mentioned above that are being worked on in the Harz. There are currently other construction sites that are of interest to drivers. For example, the road renovation of federal highway 81 between Blankenburg and Hasselfelde has been underway since April 22nd, and the repair of the Wendefurth Bode Bridge has also been commissioned. This work is expected to last until the end of 2025 and is estimated to involve investment amounts of around 4.1 million euros. Traffic disruptions are also to be expected here radiosaw determines.

The situation in the Harz requires patience and flexibility from all road users and nature lovers. These are the challenges that the beautiful, but often weather-prone terrain brings with it. Please plan your visit to this region in advance and note the relevant detours and local information.