Issues related to the safe operation of the transport system as a whole. The article touches upon the questions on how to repair the car in Volgograd. In the city, this guide is the only link in the area. Long-term operation of the overpass led to the accumulation of a large number of defects and damages that prevented it from being fully used. Accounting for all aspects of the safe use of the way to ensure its sustainable functioning. The measures ensuring the safe operation of transport facilities include: increasing the dimensions of the roadway of the overpass, strengthening structures to increase the carrying capacity to normative work, processing and storing seismic precipitation on the span, installing a video camera for rapid response in case of traffic accidents and illegal actions. To increase the load-bearing structures, the new beams should be replaced with new beams, designed for high loads, and also use composite reinforcement with carbon fiber.

Keywords: safety, load-carrying capacity, reconstruction, bridges, sustainable functioning, reinforcement, diagnostics of structures, waterproofing

In the article the main types of corrosion of concrete, such as chloride, sulfate, acid and carbon dioxide, are considered, the mechanism of cement stone damage is given. The danger of leaching of concrete is shown. Protection of bridges from penetration of aggressive moisture is waterproofing. Materials used for the device of waterproofing in our country are given, their advantages and disadvantages.

Keywords: Waterproofing bridges, carbon dioxide corrosion, chloride corrosion, acid corrosion, concrete leaching, waterproofing materials, adhesion