Which Walloon roadworks could disrupt your commute after the summer break?

SOFICO published its back-to-school roadworks overview for Wallonia on 21 August 2026, confirming that 13 major projects are ending or nearly complete, 16 are starting or have recently begun, and 20 will continue into the autumn or beyond. The practical takeaway for residents returning to work or school is simple: check Trafiroutes shortly before departure, then consult SOFICO’s project map for the detailed diversion if your journey uses an affected autoroute or route nationale.

Several summer restrictions are being removed. SOFICO says normal traffic should resume in both directions on the E40/A3 at Herve before the morning peak on Monday 24 August, although a short 90 km/h restriction will remain temporarily. Roads have also been released at Crisnée, Soumagne, Wierde-Naninne and on parts of the N5 between Waterloo and Lasne. At Sambreville, the E42/A15 junction reopened on 21 August and the remaining works are due to finish on 28 August.

That easing will be offset by a fresh set of works spread across the region. The E25/A26 between Mabompré and Houffalize is reduced to one lane in each direction until early October, with a 70 km/h limit and two ramps closed towards Liège. SOFICO directs motorists travelling from Bastogne to Houffalize through junction 52 and the N30; lorries above 7.5 tonnes face a longer itinerary involving Baraque de Fraiture or a motorway U-turn.

Around Liège, reconstruction of the E40/A3 between Vottem and Hauts-Sarts is scheduled to continue until late October. Two lanes remain available in each direction until 11 September, and the most disruptive operations are being organised mainly at night, according to SOFICO. On 1 September, work also begins on the bridge carrying the E42/A15 above the A604 at Grâce-Hollogne. Three lanes should remain open each way, but the connection from the A604 coming from Seraing towards the E42 for Namur will close; the published diversion runs via rue de l’Aéroport and the Liège Airport access.

For commuters around Namur, resurfacing begins on 3 September on the E411/A4 from the Beez viaduct to Wierde in the Luxembourg direction. SOFICO expects two lanes in each direction, a 70 km/h limit and no junction closures until the end of September. Farther south, the N4 at Senonchamps will be reduced to one lane each way over part of the route towards Martelange during September.

Hainaut has several sharper local interruptions. Boulevard Delwart, part of Tournai’s R52, is due to close between the Europe and Imagix roundabouts from 31 August until the end of November while the road and bridge surface are rehabilitated. Local access for residents and businesses should remain possible, but vehicles cannot cross the Delwart bridge. In Soignies, the Reine de Hongrie roundabout is scheduled to close completely from 10 to 13 September, with diversions using either chaussée Brunehault and the N524 or the E42-E19/A7 and N55.

The Haut-Ittre interchange will remain another sensitive point for journeys between Walloon Brabant, Brussels and Hainaut. SOFICO says the final resurfacing phase on the R0 and E19 approaches should last until 11 September, one week longer than previously expected. Movements between the Haut-Ittre roundabout, Waterloo, Mons and Wauthier-Braine are being redirected through routes including the N28, N252 and Nivelles-Nord. Drivers should follow the signed itinerary rather than relying exclusively on a familiar satnav route.