# Danish railway infrastructure modernization > Live situation record from CLSTR: https://clstr.news/situations/danish-railway-infrastructure-modernization > Updated: 2026-10-20T07:21:00.000Z. Sources: 4. Developments: 2. Banedanmark has been implementing various infrastructure upgrades and technological transitions across the Danish rail network. On the Svendborg–Odense line, the agency transitioned to the European Rail Traffic Management System (ERTMS), a digital signaling technology designed to replace analog systems and improve safety. Similarly, extensive renovations at Aarhus Central Station, involving track replacement and platform extensions, are nearing completion. However, technical challenges have emerged on the high-speed line between Ringsted, Køge Nord, and Copenhagen. Speed restrictions were imposed due to cracks and irregularities in the tracks. Banedanmark identified the cause as a lack of heavy freight train traffic, which is necessary to smooth rail irregularities. This shortage is attributed to many freight locomotives lacking the equipment required to operate under the new signaling system implemented in early 2023. The agency expects compatible freight trains to begin operating on this section next year. ## Timeline ### 2026-10-20: Banedanmark completes major railway upgrades in Denmark Banedanmark has modernized the Svendborg–Odense line with digital ERTMS signaling and completed major track and platform renovations at Aarhus Central Station. 2 sources. https://clstr.news/cluster/banedanmark-completes-major-railway-upgrades-in-denmark ### 2026-10-06: Banedanmark identifies cause of speed limits on high-speed rail Banedanmark reports that a lack of freight train traffic, caused by incompatible signaling equipment, has led to track irregularities and speed restrictions on the high-speed line near Copenhagen. 2 sources. https://clstr.news/cluster/banedanmark-identifies-cause-of-speed-limits-on-high-speed-rail --- Cite as: Danish railway infrastructure modernization. CLSTR, https://clstr.news/situations/danish-railway-infrastructure-modernization