The bridge over the Elga River was designed on the reconstructed highway Magadan - Yakutsk in the Republic of Sakha (Yakutia). The length of the structure is 479 m.
The bridge crossing over the Kyubyume River is designed for 321 km of the reconstructed Magadan-Yakutsk highway in the Republic of Sakha (Yakutia). The length of the structure is 182 m.
The bridge over the Allah-Yun River is designed for 190 km of the Eldikan - Yugorenok highway in the Republic of Sakha (Yakutia). The length of the structure is 266 m.
The bridge crossing over the Botuobiya river was designed on the Yakutsk - Vilyuisk - Mirny highway in the Republic of Sakha (Yakutia). The length of the structure is 352 m.
In the 1980s, Lengiprotrans developed a project for a pedestrian bridge at the Strugi Krasnye Oktyabrskaya railway station.
In the 1980s, Lengiprotrans developed projects for 3 bridge crossings over the Nyukzha River on the highway along the Baikal-Amur Mainline:
• at 286 km of the road;
• at 307 km in the area of the river channel;
• at 306 km in the area of the main river bed.
In the 1980s, Lengiprotrans developed a project for a road overpass on the 366th km of the Pskov - Pytalovo railway section of the Oktyabrskaya railway.
In the 1990s, Lengiprotrans developed a project for the reconstruction of a road bridge across the Yandebu River in the Leningrad Region. The length of the structure is 195 m.
In the 1990s, Lengiprotrans developed a project for the reconstruction of overpasses and overpasses on the connecting railway tracks of the Cherepovets Metallurgical Plant. 8 structures were designed with lengths from 100 to 593 m.
In the 1990s, Lengiprotrans developed a project for a pedestrian bridge over the Vazhinka River in the village of Vazhiny. The length of the structure is 285 m.
