North-Western Tunnel (Russian: Северо-Западный тоннель) is a road and subway tunnel in Moscow, Russia. It is a part of the Krasnopresnensky prospekt, that extends the M9 motorway to the city center, and of the Arbatsko-Pokrovskaya Subway Line. It's about 2.8 km long and is the fourth longest in-city tunnel of Europe (after the Dublin Port Tunnel at 4.5 km, the Södra länken in Stockholm at 4.5 km and Giovanni XXIII Tunnel in Rome at 2.9 km).
It runs under the Serebryany bor forest. The double-level tunnel combines the road and railway traffic.
The tunnel was opened on December 27, 2007.