R0 x A201

Belgium

SPI.R0 (the redesign of the R0xA201 in Flanders) is a flagship Flemish infrastructure project delivered for De Werkvennootschap within the “Werken aan de Ring” programme. It redevelops the strategic interchange between the Brussels Ring Road (R0) and the Leopold III Avenue (A201), a key gateway to Brussels Airport and the surrounding employment zone, to improve traffic safety, reliability, multimodal accessibility and local liveability.

The existing “turbine” layout is space-intensive and complex, with multiple flyovers and weaving movements that create safety risks, congestion and a strong barrier effect between Diegem, Diegem-Lo, Zaventem and nearby business parks. The current structures are also in bad condition. SPI.R0 replaces this with a compact Single Point Interchange (SPI): one new bridge over the R0 with a single signalised junction that consolidates movements into a clearer, safer, more efficient layout. The project explicitly uses mobility investment to unlock wider place-based benefits. The compact footprint creates space for a greener “park valley”, the reopening of the Woluwe river, improved ecological value, and new walking and cycling links that close missing connections between key cycle routes. The project also includes complementary interventions such as the Strabet junction upgrade and links to public transport infrastructure. SPI.R0 is delivered as a long-term PPP by the project company SPI.R0 NV (Jan De Nul, Willemen and TINC), responsible for design, build, finance and 30-year maintenance. Since contract close in 2024, enabling works and early construction have progressed, including phased flyover demolition and traffic management to keep the airport region accessible throughout delivery.