Computer technology of designing of optimum road constructions made of local materials

This article considers the principles of formation and support of the database management system (DBMS) in design of optimum road designs made of local road-building materials. The principle of multilevel representation of information bases, which are connected by relational communications, is the basis for design. Databases contain separate information files on administrative or territorial regions of area or the region, technical parameters of highways, soil and geological conditions and also data on the available road-building materials of the region and their specific expense. Contact between the separate DBMS files is kept constantly by means of the uniform codifier. Management of databases is carried out by the AD application program written in the FoxPro language, allowing one to run for search of optimum roadbed designs depending on the area of construction, technical category of the road and type of soil of a roadbed with their subsequent check on durability. (paper)