Frejus T4 tunnel – Temporarily modified traffic regime
Susa, 31 October 2025 – SITAF SpA, concessionaire of the A32 Turin–Bardonecchia motorway and the Frejus Tunnel (T4), informs users that, to allow technical maintenance works, the circulation regime within the tunnel will be temporarily modified of the Frejus Tunnel.
Periods concerned
- Every night from 3 to ’8 November 2025
- Every night from 17 to 22 November 2025
During these periods, from 9.30pm to 6.30am, the tunnel will be open to traffic in bidirectional (two-way) mode.
Temporary closures for technical operations
To allow traffic conversion maneuvers, the tunnel will be closed at the following times:
- Evening: from 9:30 pm to 10:30 pm
- Morning: from 05:45 to 06:30
Safety recommendations
SITAF recommends maximum caution to motorists and strict compliance with the signs inside the tunnel, remembering that it is absolutely forbidden to overtake during two-way traffic.
For information on traffic, we recommend that you read the information disclosed with the Variable Message Panels (PMV) and contact the toll-free number 800.840.708 (Call Center “Via Nord Ovest”, active 24 hours a day). Real-time information on traffic is available on the website of the www.sitaf.it route and by subscribing to the official Telegram channel “A32 Turin-Bardonecchia” (https://t.me/SITAFA32) and “T4 Fréjus Tunnel” (https://t.me/SITAFT4) and WhatsApp A32 (https://www.sitaf.it/tratta-a32-canale-whatsapp/) and WhatsApp T4 (https://www.sitaf.it/tratta-t4-canale-whatsapp/)