Four bridges on three lines

Four bridges on three lines is a сrossing by two railroad lines of two streets in St. Petersburg, Russia.

Bolshoy Sampsoinevsky overpass
Overpass at winter morning
Coordinates	59°59′34″N 30°19′55″E
Carries	two railroads
Crosses	Bolshoy Sampsoinevsky prospect with tram line, Institutsky prospect
Locale	Corner of Bolshoy Sampsoinevsky prospect and Institutsky prospect
Official name	Bolshoy Sampsoinevsky crossover
Maintained by	RZhD, OktZhD, SPbZhD
Characteristics
Design	Joist double bridge on metal tubular support and stone coastal foundations and closed and open Metal farm with driving low
Material	Metal
Width	2 + 1 track way
No. of spans	3
History
Designer	Finnish Railways
Construction end	1869
Opened	before 1910
Location

Lanskaya station civil engineering works km to Udelnaya 1869 5.9 to Novaya Derevnya 1926 5.5 Lansky station overpass over Lanskoe Highway 1869 5.3 Lanskaya substation 1950 Serdobolskaya street 5.1 Lansky station overpass 1869 5.0 change of mileage 4.9 Lanskaya station 1869 Bolshoy Sampsonievsky prospect Institutsky prospect 4.6 Four bridges on three lines 1869 to Kushelevka 0.0 Finland Station km