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Rijkswaterstaat Tunnels — Rijkswaterstaat / Netherlands

What This Dataset Is

Point locations of 25 road tunnels managed by Rijkswaterstaat in the Netherlands. Includes both existing tunnels and planned future tunnels. Each record contains the tunnel name, road number, municipality, year of opening, and a link to the tunnel's information page.

Provider: Rijkswaterstaat (Directorate-General for Public Works and Water Management) License: Public domain (Dutch government open data)

How to Access

The data is a GeoParquet file in EPSG:28992 (Amersfoort / RD New). Use DuckDB with the spatial extension.

The file is tiny (25 features) — loads instantly.

Schema — Field Meanings

Field	Type	Meaning
`geometry`	WKB Point	Tunnel location in EPSG:28992.
`tunnelnaam`	string	Tunnel name (e.g., "Coentunnel", "Westerscheldetunnel").
`wegnummer`	string	Road number (e.g., "A10", "A4", "N62").
`gemeente`	string	Municipality where the tunnel is located.
`jaar_openstelling`	string	Year opened. String, not integer — some values are future prognoses like `"2035 (prognose)"`.
`status`	string	`Bestaand` (existing) or `Gepland` (planned).
`url`	string	URL to tunnel information page on Rijkswaterstaat website.
`beheerder`	string	Operator / manager of the tunnel.

Useful Query Patterns

List all tunnels

Group tunnels by road number

Find planned (future) tunnels

Tunnels by municipality

Geometry Notes

CRS is EPSG:28992 (Amersfoort / RD New). Coordinates are in metres.
All geometries are Point — representing tunnel locations, not extents.
Reproject to EPSG:4326 for web maps.

Visualization Styles

One Mapbox GL v8 style is available for interactive map visualization via the PMTiles file.

Style files are Mapbox GL v8 JSON with relative PMTiles source paths. They can be used with MapLibre GL JS, OpenLayers (via ol-mapbox-style), or any Mapbox GL v8-compatible renderer.

styles/default.json — Red circles with white borders, sized by zoom level. Labels show tunnel names at higher zoom. Shows the spatial distribution of road tunnels across the Netherlands.

Style files are at: https://data.source.coop/cholmes/portolan-nl/rijkswaterstaat/fme_disk_tunnels/styles/

Caveats

jaar_openstelling is a string, not an integer — some values include prognosis text like "2035 (prognose)". Do not cast directly to integer without cleaning.
Small dataset (25 features) — only tunnels managed by Rijkswaterstaat on the national road network, not all tunnels in the Netherlands.
Status values are in Dutch: Bestaand = existing, Gepland = planned.

Hand-maintained agent guide (ported from this collection's llms.txt in August 2026). Update it alongside collection.json.