Bets S. Improvement of the method for calculating spatial visibility on the roads

Ensured visibility on highways is the most important indicator of its transport and operational qualities and traffic safety. For road safety, the driver must see a section of sufficient length in front of him so that, seeing an obstacle, he can take measures to brake in a timely manner. Existing visibility assessment methods are based on the representation of the route in two separate planes, horizontal and vertical. This limits the ability to obtain reliable real visibility values. The analysis of the existing methods of determining the visibility and basic parameters of roads in the course of the dissertation research showed their imperfection to solve the problem. Visibility is considered separately in two planes (in plan and profile), which does not take into account the simultaneous combination of horizontal and vertical elements. This approach cannot provide sufficient accuracy in determining the range of visibility. The dissertation presents a theoretical generalization and a new solution to the scientific and practical problem, which is to improve the method of calculating spatial visibility and increase traffic safety. The paper improves the method of calculating spatial visibility taking into account the parameters of the roads on the basis of geodetic coordinates, which takes into account the radius of curvature at any point. The improved method of "cones" and the proposed "coefficient of spatial visibility" allows you to assess visibility and develop measures to improve it and increase traffic safety in space, plan and profile.