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ABSTRACT Engineering and construction of geotechnical structures in northern regions of the Far East and Yakutia are always connected with high risks. It is especially true about linear transport projects that require greater level of reliability and are considered of high criticality rating. Reinforced ground structures are constructed and projected in mountainous tight working space near the Vostochnaya Khandyga river bed during reconstruction of a motor road from Yakutsk to Magadan. Reinforcing geogrids are made of high-density polyethylene according to the international requirements; they are protected from corrosion environment and their specific rates are stable and high. Numeric modeling of the automobile road structures behavior allowed to detail with high precision the theoretical calculations and basic project parameters of the structures. Professional use of properties of high-tech and high quality geomaterials ensures effective construction of projects in remote regions with cold climate. It helps minimize geological risks, provides quality of design and construction works as well as safety of structures.