Это собственно из письма, которое переслали англичане.
This 3150 m long tunnel in Russia is the longest in-city tunnel of Europe. There is a river running over it and water leaks at some points. When the temperature reaches -38 degrees like it did this winter, the road Freezes and the result is the attached video taken during a single day with the tunnel camera.
PS: how much fun would the bus ride be