The method of sequential analysis and determination of standards of deviations from the design parameters of logging roads

Modern road construction is performed by a flow method that ensures continuity of operation and requires timely and accurate center-control measurements and tracing. Therefore, the untimely restoration and fixing of destroyed center marks by inefficient methods, especially on the curves leads to a delay in the construction process. This might result in construction materials excess expenditure in case of road parameters violation or in machine hours and energy resources excess expenditure for defects removal by repeated poorly controlled movement of soil and building materials. Insufficient degree of detail in center marks distribution on the curves, as well as their unproductive or inaccurate restoration also leads to distortion of the designed curvilinear outlines of roads. Therefore it results in violations of the easement curve functions and in deterioration of their dynamic properties. In addition it leads to a decrease in visual clarity, riding quality and aesthetics of curves perception, thus negatively affecting drivers' psychological status. All of the above leads to a decrease in technical and economic indicators and traffic safety. The purpose of the work is to improve the consistent analysis methodology and determination of standards of deviations from the design parameters of logging roads. Standards of deviations from design parameters in accordance with regulatory requirements are defined and recommendations are given for monitoring the construction of road curves. The results of studies using the theory of Markov random processes to predict the volume of control measurements for sequential analysis allowed the authors to determine the measurement intervals and to optimize their number and thus to reduce their total number by 4 times compared with the recommendations of the Construction Standards and Regulations (SNiP). The developed and researched decision engine of sequential analysis of logging roads allowed us to substantiate the proposed acceptance methodology of quality differentiated assessment of constructed logging roads geometric parameters.