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Big risk of traffic jams on the A4: construction sites until 2029! This is how you stay mobile!
Find out everything about the construction sites and traffic restrictions on the A4 in North Rhine-Westphalia from 2025 to 2029.
Big risk of traffic jams on the A4: construction sites until 2029! This is how you stay mobile!
In Cologne and the surrounding area the motto is “Attention, construction site!”. From June 10th, 2025, at 3 p.m., things will go haywire on the A4 and the surrounding streets until June 16th, 2029. This extensive construction work entails significant restrictions, especially in terms of traffic.” [news.de](https://www.news.de/auto/858677089/verkehrsmelde-nw-koeln-zur-verkehrsstoerung-wegen-baustelle-von-10-06 -2025-to-16-06-2029-restrictions-in-traffic-north-rhine-westphalia-danger of traffic jams-in-porz-kalk-rodenkirchen-on-a4/1/) reports that the motorway sections near Cologne are particularly affected.
The construction sites between the Cologne-South motorway junction and the Rodenkirchener Bridge in the direction of Aachen and Heerlen are currently the most affected. Here, drivers can expect a maximum passage width of 10.50 m between June 10th and 26th. But there will also be tighter conditions between the AK Köln-Süd and the Rodenkirchen Bridge between June 26th and July 3rd, when the passage width will be reduced to 6.25 m. Trips have to be rescheduled or even postponed again and again because the risk of traffic jams is enormous throughout the entire construction period.” verkehrslage.de
Traffic forecasts and traffic jam developments
The immediate surroundings of the construction sites, such as Porz, Kalk and Rodenkirchen, will particularly suffer from the increased traffic volume. The density of the road network in North Rhine-Westphalia has now resulted in numerous traffic jams. Over the last few months, the total length of traffic jams on motorways has increased by a whopping 26 percent. For many road users, the journey to work becomes a test of patience. The duration of traffic jams has also increased by 20 percent and is now over 15,500 hours. ADAC experts are calling for more coordination in construction site measures in order to distribute the burden more evenly.” wdr.de
Another highlight in the planning and approval process, which, according to the ADAC, should be accelerated. Whether it's bridge work or crash barrier replacements, road users will have to prepare for numerous construction sites until 2034. For example, at the Wiehl valley bridge, where driving will only be restricted until December 1, 2034, or at the Molbach valley bridge, where the road has also been narrowed to one lane.” verkehrslage.de
Driving experts strongly advise considering alternative routes or adjusting travel times accordingly. In recent months it has also been shown that many construction sites are leading to an impressive increase in the length of traffic jams. “The density of the motorways here in North Rhine-Westphalia is unique, which also means that the burden caused by construction sites has a particularly strong effect on traffic flow,” explains a spokesman for the WDR traffic studio. According to estimates, traffic jams traditionally increase in the summer because many people travel and the construction sites further inhibit the flow of traffic through their arrangements. Another challenge is to complete the necessary work required by winter, when frost and snow make construction difficult.” wdr.de
With a large number of upcoming construction sites and the associated challenges, traffic in Cologne and the surrounding area will certainly be exciting - or stressful - over the next few years. Drivers should always stay up to date and prepare for the upcoming changes!