Large construction site on A9: Coswig closed until December!

Large construction site on A9: Coswig closed until December!

From today, September 8, 2025, drivers in the Wittenberg district can expect new restrictions on Autobahn 9. The Coswig junction in the direction of Berlin will be completely closed for around six weeks. This means that road users who want to leave Coswig must continue to the Köselitz junction. From there it is possible to take the A9 southwards. If you want to turn onto the A9 towards Berlin, you will be directed towards Munich and have to turn around at the next junction in Vockerode.

The restrictions on the A9 are part of a comprehensive construction phase that will last until December 2025 and extends over a length of 10.3 kilometers. These construction measures are necessary to renovate the road surface, which is now 22 years old and suffers from the so-called “concrete cancer”. The traffic load on this route is constantly around 60,000 vehicles per day. Loud MDR The diversion is already signposted and the motorway operator is asking drivers to drive particularly carefully.

What is “Concrete Cancer”?

But what exactly is this “concrete cancer”? It is a chemical reaction between alkali-sensitive silicates in concrete and alkali ions from cement, which leads to the formation of a gel. This gel absorbs water and expands, causing enormous tension in the concrete. Typical damage includes cracks, spalling and efflorescence, which affect the stability and durability of the road in the long term. In Germany in particular, many old motorways are affected by this problem, as is the A9, which is now being renovated to overcome these challenges. A special approach can help to avoid these problems, but the costs for renovation are often high, as auto motor und sport reports.

Construction sites and traffic disruptions

The Autobahn 9 is not the only construction site that is currently causing problems for road users in Germany. There are many large projects coming up in 2025, including extensive bridge and tunnel renovations as well as further roadway renovations. These projects are designed to ease the traffic jam situation, as the ADAC shows in a current report. However, drivers must be prepared for the fact that construction sites and traffic disruptions make up a significant portion of travel traffic. The list of the most well-known traffic jams is headed by the A1 Dortmund-Cologne and the A3 Frankfurt-Cologne, where construction sites have been causing delays for years.

In order to get through the construction zones safely, drivers should not only drive particularly carefully, but also observe the applicable rules - such as the zip fastening procedure. It is particularly important in construction areas to keep sufficient distance. Anyone who still plans to drive on the A9 in the foreseeable future should be prepared for traffic disruptions and longer journey times, as the extensive work can also affect the traffic situation on other sections. Overall, it can be said that the focus is on renovation work in many regions of Germany, such as North Rhine-Westphalia, Bavaria and Hesse, as can be seen from the data-rich information from the ADAC.

In summary, it is time to be patient and keep an eye on the current detours and notices in order to reach your destination safely and stress-free.