Lefortovo tunnel (Russian: Лефо́ртовский тонне́ль) is a road tunnel in Moscow, Russia that is part of the Third Ring road. At 2.2 km (1.367 miles) long it is the third longest in-city tunnel of Europe (after the Dublin Port Tunnel at 4.5 km, and the Södra länken in Stockholm, also 4.5 km).
The tunnel runs under the Yauza River, and water leaks in at some points. When the temperature reaches −38 degrees Celsius as during the winter of 2005, the road surface can freeze.
It has been nicknamed "The Tunnel of Death" due to its high accident rate and a video circulating around the Internet apparently compiling footage of vehicle accidents recorded by monitoring cameras.
