The Ufa city centre road tunnel construction resumed after 13 years of suspension. The tunnel is now in construction for 30 years writes Russian press.

Ufa city centre road tunnel is 60 metres under the gound. 1245 metres long.  It's purpose is to connect the highways M-5 Ural and M-7 Volga to lighten the traffic in this part of Russia.

Original construction started in 1992. But soon construction faced many problems. One of them was a nearby river. The unstable ground made construction very difficult. There was only 20 metres progress in a month. Finally construction suspended in 2007. 

After 13 years of no work, construction started again. But this time a foreign contractor does the job. In addition to the main tunnel, two more parallel running road tunnels has been added to the project. Work is planned to finish in 2023.

https://motor.ru/news/russia-tunnel-11-12-2020.htm