How to Navigate Traffic and Reach NL Space Campus During NATO Summit 2025

NATO Summit 2025 – Traffic Measures Overview

The 2025 NATO Summit in the Netherlands represents a massive logistical and security effort, particularly affecting Noordwijk and surrounding areas. National and regional authorities are coordinating to maintain safety and accessibility, but significant traffic disruptions are expected.

National Disruptions (June 22–27)

Preparations begin Sunday afternoon, June 22; disruptions will last until Thursday, June 26. Expect closures of highways (A5, A4, A44, N44), ramps, viaducts, and tunnels, as well as disruptions on local roads in The Hague, Wassenaar, Katwijk, Noordwijk, Haarlemmermeer, Leiden, and Rotterdam. Emergency services will have priority access.

Bollenstreek Region Access

The Bollenstreek will remain accessible, but travellers should expect longer journey times. Limit car travel where possible, opt for bikes or public transport, and expect traffic stops and congestion.

Main Routes for Motorised Traffic to/from Bollenstreek

From the north (Haarlem/Amsterdam/Schiphol):

1. via the A9 and Drie Merenweg in the Haarlemmermeer (N205) and Elsbroekerbrug (N207) towards Lisse and Hillegom (N208)
2. Note: This route is also used by Haarlemmermeer residents, so expect disruptions.
3. via the A9 and Schipholweg in Haarlem (N205) and Herenweg (N208) or N201/N206 via Aerdenhout towards Hillegom and De Zilk.

From the (north)east:

1. via the A4 junction 6 Hoogmade and Willem de Zwijgerlaan in Leiden to the Rijnzichtweg to Rijnsburg and Haarlemmertrekvaart (N444) to Sassenheim.

From the (south)east:

1. via the A4 (Hofvliet junction) and the Rijnlandroute via the Corbulotunnel (N434) to the N206 in the direction of Katwijk, Noordwijk and Noordwijkerhout.
2. Note: The N206 will be closed briefly between Leiden and Noordwijk for passing delegations.
3. Wednesday afternoon/evening only:
4. Route via junction 7 Leiden/Zoeterwoude-Dorp to N206 due to Rijnlandroute closure.
5. Due to the closure of the A44, routes via A44 exit 6, Noordwijk, and exit 3, Noordwijkerhout, to N206 are not available.
6. Expect extra disruption around Leiden Bio Science Park due to detours.
7. Outside peak times and closures, Lisse is accessible via A4 (from Rotterdam/The Hague) and N207 from Alphen aan den Rijn/Leimuiden.

A44 Access – from Wassenaar to Burgerveen/Amsterdam (except Wed. PM/evening):

1. Entrance/Exit 8 Leiden / Katwijk at Plesmanlaan (N206)
2. Entrance/Exit 7 Oegstgeest at Rijnzichtweg
3. Entrance/Exit 6 Noordwijk
4. Exit 5 Sassenheim (closed during peak times on Mon/Tue)
5. Entrance/Exit 4 Warmond (only from/to Warmond during peak times)
6. Entrance/Exit 3 Noordwijkerhout
7. Entrance/Exit 2 Kaagdorp (only from/to Buitenkaag during peak times; viaduct to Abbenes closed)
8. Entrance/Exit 1 Lisserweg

Local/regional crossings:

Haarlemmertrekvaart (N444), Rijnzichtweg, and Plesmanlaan (N206) will stay open. Outside peak times, other intersecting roads like Ommedijkseweg and Warmonderweg may also be used, with potential short closures for delegations.

Bicycle Traffic

Some bike routes will be closed; delays are expected due to detours. The following crossings will remain open:

1. Cycle path along Ommedijkseweg in Leiden
2. Tunnel at Hellegatspolder/3e Poellaan in Lisse
3. Path along Van Pallandtlaan (N208 entrance to A44, Sassenheim)
4. Bicycle tunnel in Vlietvennepad (Sassenheim Station)
5. Cycle path along Wasbeekerlaan (Sassenheim Station)
6. Klinkenberg → Spoorpad (Sassenheim)
7. Cycle path along Haarlemmertrekvaart (N444, Oegstgeest)
8. Canal Path North-East (Oegstgeest), 2-way tunnel
9. Cycle paths along Rijnzichtweg (Oegstgeest)
10. Bicycle tunnel in Robert Boyleweg (Leiden)

Public Transport

Regional transit providers are still reviewing the impact of the timetable. Updates will follow. Dutch Railways and train stations remain unaffected.

Travel Advice

If you plan to travel:

1. Avoid car use unless essential
2. Use public transport, bike, or walk
3. Plan via official websites (van A naar Beter, Rijkswaterstaat, province, municipality, OV providers, schiphol.nl)
4. Expect long delays, and follow the signed diversion routes
5. Noordwijk diversion routes are still being finalised