Brussels Tram Disruptions: Major Repairs to Premetro Tunnel to Impact Lines 4 and 10
Brussels commuters face significant disruptions to tram services beginning April 27, 2026, as the STIB-MIVB (Brussels Intercommunal Transport Company) undertakes essential repairs to a critical section of the premetro tunnel beneath the South Station (Zuidstation). The year-long project will severely restrict tram lines 4 and 10, impacting thousands of daily passengers. The work focuses on a deteriorating concrete plate supporting a dual-level tramway system, with officials warning of potential structural failure if repairs are not undertaken promptly. This infrastructure, approximately forty years classic, has shown increasing signs of water damage and corrosion, necessitating a comprehensive overhaul to ensure the safety and reliability of the city’s public transport network.
The repairs are crucial to prevent a potential collapse of the tunnel structure, which could affect underlying rail lines. Laurent Vermeersch, spokesperson for STIB-MIVB, emphasized the urgency of the situation, stating, “Er sijpelt water in het beton en het staal is aangetast. Als niet wordt ingegrepen, bestaat een risico op instorting op de onderliggende sporen,” – translated as “Water is seeping into the concrete and the steel is corroded. If no action is taken, there is a risk of collapse onto the underlying tracks.” The current construction zone for Metro Line 3, located near the Baraplein in Sint-Gillis, provides convenient access to the affected infrastructure, making this an opportune time to start the necessary work. The project represents a substantial investment in maintaining Brussels’ aging transport infrastructure.
The disruption to tram lines 4 and 10 is expected to be extensive. While the lines will continue to serve the South Station from the city center at street level, significant portions of their routes will be suspended. The MIVB is implementing a comprehensive network of alternative routes and replacement bus services to mitigate the impact on commuters. This includes adjustments to other tram and bus lines, as well as the introduction of temporary bus routes designed to replicate the affected tram services as closely as possible. The scale of the disruption underscores the importance of proactive infrastructure maintenance in a densely populated urban environment.
Impact on Specific Tram and Bus Lines
During the repair period, tram 4 will operate only between North Station (Noordstation) and Wiels, and between Hallepoort and Stalle. Tram 10 will be limited to service between the Military Hospital (Militair Hospitaal) and the South Station. Tram 51 will terminate at Lemonnier instead of the South Station. Tram 81 will operate only between Drievuldigheid and Montgomery, with a replacement bus service running between Marius Renard and the South Station. VRT News reports these changes are designed to manage traffic flow during the construction period.
To assist passengers navigating the altered network, the MIVB is recommending the use of metro lines 2 and 6 as alternatives for travel between Hallepoort and the South Station. For those traveling to and from Sint-Gillis, Ukkel, and Vorst, alternative options are being provided. Bus line 48 will serve the South Station, Hallepoort, and Anneessens stops for passengers traveling from Ukkel and Vorst, and will be supplemented by an extension of bus line 37 to the South Station. The temporary bus line 96 will closely follow the route of tram 81 between Drievuldigheid and the South Station via the Bareel. Bus line 50 will take over the route of bus line 52, increasing frequency and extending service to Hallepoort and Central Station.
Long-Term Alternatives and Future Connections
Looking ahead, tram line 82 is scheduled to connect Ukkel and Vorst with the South Station starting June 6, 2026. Tram line 92 will provide a connection between the center of Ukkel and the center of Brussels. For commuters holding a Brupass travel card, the S1 line of the National Railway Company of Belgium (NMBS) offers another alternative, connecting Ukkel-Kalevoet, Ukkel-Stalle, and Vorst-Oost stations with the major Brussels train stations. These additions aim to provide a more robust and interconnected public transport network for the region.
The ongoing work on the premetro tunnel is occurring alongside other significant infrastructure projects in Brussels, including the expansion of the metro network. The MIVB is coordinating these projects to minimize disruption and maximize efficiency. The agency recognizes the inconvenience caused by these disruptions and is committed to providing clear and timely information to passengers throughout the repair process. Laurent Vermeersch, the MIVB spokesperson, is a key figure in communicating these updates to the public. His LinkedIn profile details his role as spokesperson and stakeholder communication coordinator.
Navigating the Disruption: Resources for Commuters
The MIVB is providing a range of resources to help commuters plan their journeys during the disruption. These include real-time travel information available on the MIVB website and mobile app, as well as dedicated information desks at major transport hubs. Passengers are encouraged to check the MIVB website for the latest updates and to allow extra time for their journeys. The agency is also providing assistance to passengers with disabilities or mobility issues to ensure they can continue to access public transport services.
The repair work on the premetro tunnel is a critical investment in the long-term sustainability of Brussels’ public transport network. While the disruption to tram services will undoubtedly be challenging for commuters, the MIVB is working diligently to minimize the impact and provide alternative travel options. The project underscores the importance of proactive infrastructure maintenance in ensuring the safety and reliability of urban transport systems. The completion of these repairs will safeguard the structural integrity of the tunnel and ensure the continued operation of tram services for years to come.
The MIVB will provide further updates on the progress of the repairs and any changes to the alternative travel arrangements as the project progresses. The next scheduled update from the MIVB regarding this project is expected in late May 2026. Passengers are encouraged to visit the MIVB website for the most current information. We invite readers to share their experiences and feedback on these disruptions in the comments section below.