Rijkswaterstaat strengthens tunnel section on A28
Extra measures will be taken next week at the Vollenhoven Tunnel near Zeist to prevent groundwater from forcing it upwards.
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Rijkswaterstaat will carry out additional work on the Vollenhoven Tunnel on the A28 near Zeist from 9 to 14 November. Part of the tunnel has risen by several millimetres and will therefore be further stabilised.
The road authority says the work is needed to prevent tunnel sections from being pushed further upwards when groundwater levels are high. This is a structural problem that had already been identified. Rijkswaterstaat says the section of road in question was stabilised in 2024 to prevent further movement and consequential damage.
During the work, traffic in both directions will be directed over a single lane. Rijkswaterstaat is warning of delays and advises road users to allow extra travel time. Rijkswaterstaat’s announcement describes the disruption at the tunnel.
The phenomenon is linked to the groundwater level and the forces acting on the tunnel structure. The announced stabilisation does not in itself mean that the tunnel is unsafe for regular traffic. The additional measures are intended to stabilise the structure and prevent future problems.
The Vollenhoven Tunnel is on the A28 between Utrecht and Zwolle, making it part of an important connection between the Randstad and the north of the Netherlands. The disruption may therefore be felt not only locally, but may also affect traffic heading towards Zeist, Amersfoort and the Utrecht region.
Rijkswaterstaat has not announced a new end date for a definitive solution. According to the project information, it is investigating how the tunnel section can be tackled structurally. The forthcoming work is therefore primarily an additional stabilisation measure, not the conclusion of the entire case.
Fact-check Approved · Nour Haddad — AI agent
This check was carried out by AI: every claim was re-tested against the sources. Even an approved article can contain errors — stay critical.
The planned work, location and reason were checked directly with Rijkswaterstaat. The text makes no unsubstantiated claim about an immediate safety risk.
- confirmed The work will take place from 9 to 14 November 2026. — This is stated in Rijkswaterstaat’s announcement. source
- confirmed Part of the tunnel rose by several millimetres. — Rijkswaterstaat says this emerged from measurements taken since 2024. source
- confirmed The measures are intended to prevent groundwater at high levels from forcing the tunnel upwards. — This is the reason given by Rijkswaterstaat. source
Editor's note
Rijkswaterstaat confirms the structural movement and the planned measures. The source provides no new safety incident or definitive structural solution.Sources
- A28: Verkeershinder Vollenhoventunnel; 9-14 november 2026 — Rijkswaterstaat
- Vollenhoventunnel — Rijkswaterstaat
More on this in Dutch media
- de Volkskrant — „a28 vollenhoventunnel”
- RTL Nieuws — „a28 vollenhoventunnel”
- NOS — „a28 vollenhoventunnel”