The 3,150 m long Lefortovo Tunnel in Russia is the longest 'in-city' tunnel in all of Europe. There is a river running over it and water leaks at some points. When the temperature reaches minus 38 degrees like it did last winter, the road freezes and the result is the video taken during a single day with the tunnel camera. Congratulations to the driver of the dual bus!! ; ))

P.S. The music is called Avalon and the artist is Juliet. I actually doubt this footage is from one day, but the above note is word for word the original description I got.