Jena, April 02, 2026. Drivers on the A4 motorway must prepare for significant restrictions in the coming months. Between the Jena-Zentrum and Stadtroda junctions, extensive road surface renewal will begin shortly, which is expected to affect traffic until December 2027.
- Measure: Fundamental road surface renewal over a length of 8.5 kilometers.
- Section: A4 between the Jena-Zentrum and Stadtroda junctions.
- Main Work Period: Mid-May 2026 to December 2027.
- Preparatory Work (Traffic Management): April 7 to May 15, 2026.
- Traffic Management: Two lanes on the hard shoulder and slow lane.
- Costs: 45.7 million euros.
Work in Two Construction Phases
According to the responsible authorities, the road surface of the heavily used motorway shows significant damage. Due to the massive traffic load of around 58,000 vehicles per day, this maintenance measure has the highest priority this year. In 2026, construction work will initially focus entirely on the carriageway towards Frankfurt am Main, which will undergo fundamental renewal. In the following year, 2027, it will be the turn of the opposite carriageway towards Dresden.
In addition to the road construction itself, the 45.7 million euro project includes other important infrastructure work. Parallel to the renewal of the road surface, repairs will be carried out on bridge structures. Furthermore, safety barriers, drainage systems, road markings, and signage along the entire 8.5-kilometer section are to be updated to the latest standards.
Restrictions Starting as Early as April
Before the heavy construction equipment can move in in May, the modified traffic management must be set up. These preparatory measures will start as early as April 7, 2026, and are expected to last until May 15. During this lead-in phase, traffic in both directions will be narrowed to two lanes each and guided past the construction area via the hard shoulder and the slow lane.
Background: The A4 as a Bottleneck in Commuter Traffic
The A4 is one of the most important east-west traffic axes in Germany and represents a central artery for the East Thuringia region. Experience shows that a construction site of this magnitude on the heavily frequented section between Jena and the Saale-Holzland-Kreis leads to delays, especially during morning and evening rush hour traffic. Commuters wishing to avoid traffic jams traditionally often divert to the Bundesstraße 88 through the Saaletal or the country roads around Stadtroda. In the event of tailbacks before the Jena-Zentrum exit, increased diversion traffic is also to be expected in the Jena district of Lobeda. Road users are advised to plan significantly more travel time, especially during the multi-week adjustment phase of the construction site starting in April, and to pay attention to up-to-date traffic reports.
Source:
Umfangreiche Fahrbahnerneuerung auf der A4
Transparency Note: This article was created automatically, editorially reviewed, and expanded with AI support.