Charleroi Invests €50M in Major R9 Ring Road Renovation
The city of Charleroi is set to undergo a major infrastructure overhaul as the Walloon government announces a €50 million investment to renovate the R9 ring road and Boulevard Mayence. The project, confirmed by Walloon Minister of Infrastructure and Mobility François Desquesnes in a written response to the Walloon Parliament, aims to address critical safety concerns and revitalize the city’s urban landscape.
Context: An Aging Arterial Road
Built in the 1970s and opened in 1976, the R9 — Charleroi’s inner ring road, or “petite ceinture” — is a 5.25 km one-way counterclockwise autoroute that encircles the city center. Designed by urban planner Jean Yernaux, it carries up to 47,000 vehicles daily and serves as a vital artery for the city’s mobility. However, the infrastructure has shown significant signs of aging, with concrete falls reported since 2019 and new stone falls occurring as recently as May 2026 at the Porte de la Neuville access, as RTBF reported.
The Renovation Plan: Two Phases
The investment is divided into two main phases. Phase 1, budgeted at approximately €36 million, covers the renovation of two R9 tunnels — Tunnel Mayence and Tunnel Hiernaux — along with the Boulevard Mayence surface road. This phase is a joint contract between SOFICO (the Walloon infrastructure financing company) and the City of Charleroi, with SOFICO financing 90% of the Boulevard Mayence works and the city covering the remaining 10%.
Phase 2, with a budget of approximately €14 million, will focus on the Viaduc de Broucheterre and Sortie 2 “Porte des Piges.” These structures are currently being studied for renovation.
Timeline and Traffic Management
Work on the Tunnel Mayence is expected to begin in early 2027 and will last approximately two years. The schedule for the Tunnel Hiernaux renovation will be determined following a mobility impact study. For the Broucheterre viaduct and Porte des Piges, work is not expected to start before mid-2027.
SOFICO spokesperson Héloïse Winandy assured that traffic disruption will be minimized: “These works will obviously be phased to limit the impact on traffic. On the R9, in the tunnel, during the day, at least 2 lanes will always be accessible. Closures are planned but only at night.” No full closure of the R9 is anticipated.
Safety Concerns Driving Action
The renovation comes in response to growing safety concerns. Concrete falls beneath the ring road were first reported in 2019, when a piece of the structure detached and crashed onto a roundabout below. More recently, in May 2026, new stone falls occurred at the Porte de la Neuville access, prompting renewed calls for action from local deputies.
Minister Desquesnes emphasized the proactive approach to maintenance: “Whenever risks are identified, teams intervene preventively to remove concrete showing signs of fragility.” He also confirmed the launch of a study planning market for the renovation of all structures on the Walloon motorway network, as DHnet reported.
Broader Urban Context
Charleroi has been undergoing a significant urban transformation in recent years, with over €500 million in public investments previously noted. However, the city also faces financial constraints. The Union of Walloon Cities and Towns (UVCW) recently called for structural refinancing of Walloon cities, and a separate RTBF report from June 10 noted that “about ten construction sites in the Charleroi region have been put aside due to lack of funds.”
Despite these challenges, the R9 renovation represents a critical investment in the city’s aging infrastructure. The R9 was previously rehabilitated between 2014 and 2020, but the current project addresses specific structural vulnerabilities that have emerged since then.
What’s Next
As Charleroi prepares for what will be its most significant road infrastructure project in years, residents and commuters can expect phased construction from 2027 onward. The project’s success will depend on careful traffic management and coordination between SOFICO, the City of Charleroi, and the Walloon Region. Questions remain about the precise schedule for the Tunnel Hiernaux renovation and how the city will finance its 10% contribution given ongoing budgetary pressures. For now, the €50 million commitment signals a clear priority: ensuring that Charleroi’s vital ring road remains safe and functional for decades to come.