Western High Speed Diameter Motorway (WHSD)

One of the most important bridges realized in Russia up to now with a strategic importance in St. Petersburg city’s transport system

Motorways & Roads
  • Saint Petersburg, Russia
  • Bridges & Viaducts, Motorways & Roads
  • Completed: 2016


Total investment


  • Double-deck Bridge length 1,020 m;
  • Elevation of deck up to 54 m;
  • 7 spans (max span – 168 m);
  • Viaduct length 1,642 m;
  • 21 spans (63 to 126 m).


Construction of section 2 and 3 of the Western High Speed Diameter Motorway. WHSD is a major traffic artery that connects the souther part of the Saint Petersburg ring road with the regions located North-West from the city, in particular the E18 highway “Scandinavia” near Beloostrov. It has a total length of 46,6 km, with a daily car capacity estimated at 220,000 cars per day. The central part of WHSD, passing through Saint Petersburg along its western coastline, was the last construction phase.

Rizzani de Eccher was responsible for constructing sections 2 (bridge across the Sea Channel) and 3 (viaduct along the Belyj Island . The bridge is a double-deck structure with four lanes in each direction, located over the city’s international seaport (in an island home to approx. 5,000 residents), while the viaduct, running over the gulf of Finland, has a steel structure and was constructed by launching box girders.
The exceptionally large spans and deck height, as well as the launching methods, the challenging site and the weather conditions made this project unique for Russia.

Companies involved

Rizzani de Eccher

Our group

General contracting

Specialized contracting

Other activities