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A4 blocked! Traffic diverted due to construction work on Sunday
Traffic disruptions on the A4 on June 22, 2025 due to extra-high voltage work. Diversions have been set up.
A4 blocked! Traffic diverted due to construction work on Sunday
On Sunday, June 22nd, the A4 between Merzenich and Düren will be closed for several hours. The closure will begin at 6 a.m. and is expected to last until 11 a.m. The reason for this is necessary work on a high-voltage line by the network operator Amprion. Innovative techniques are used in this work, which is important as part of the energy transition in Germany, including a helicopter to install bundle spacers. This means an unexpected diversion for many road users.
During the closure, road users will be redirected via the B56, the L12 and the L264. By announcing the traffic disruption early, drivers can adapt to the situation in good time and plan alternative routes. Unnecessary stress on the motorway can be avoided.
Background to the work
The work on the high-voltage line is part of a comprehensive expansion of the transmission network in Germany. Amprion, the company that operates the line, is currently investing 36.4 billion euros in the expansion and conversion of power lines over a length of 9,300 kilometers. Modern technologies such as high-voltage direct current (HVDC) transmission are used to cope with the growing demands in the power grid. This is particularly relevant as the energy transition in Germany and European electricity trading require an increasing amount of electricity from producer to consumer.
The system management in Brauweiler near Cologne plays a crucial role. It monitors the entire network to ensure that electricity production is in line with consumption. With around 165 switchgear and transformer stations, Amprion ensures that the transmission network works efficiently and that disruptions can be resolved quickly. A contact telephone number is available for emergencies: +49 800 490-4000.
The importance of the extra-high voltage network
Amprion's high-voltage network acts as an essential part of the German and European power grid. It is designed to transport voltages between 220 and 380 kilovolts, which is of great importance for energy supply. The VDE FNN's interactive online map shows not only the existing and planned high-voltage lines, but also substations and power plants in Germany. This gives citizens a comprehensive overview of the infrastructure that bundles and secures our electricity grid. If you would like to find out more about these cards, you can read the information directly on the VDE website.
The planned work on June 22nd not only underlines the need for new technologies, but also the ongoing efforts to modernize and secure our power grid. Drivers and residents are well advised to prepare for the upcoming changes.