Impact of traffic speed on the strength of highway pavements

Abstract

The paper touches upon the issues related to the influence of the speed of traffic flow on the calculation of the strength of road pavements of highways. The dependence of the calculated parameters on the vehicle speed is shown. The definitions of such concepts as the design speed of movement on the road, the permitted speed of movement and the actual speed are given. The authors give the values of normative design indicators related to the speed of movement, which were determined more than 50 years ago for the speed of movement of trucks 40-60 km / h, and have remained unchanged since then. The paper also presents the results of the research on the speed of traffic flows along two highways M-2 “Crimea” and M-9 “Baltia” for 16 years, which prove that the speed limit on modern highways has changed dramatically in recent years and does not meet the requirements and design parameters. According to own research and research of many modern scientists, the author proposes to take into account the speed of 110 km / h when determining the design parameters for the calculation of road pavements and to use the dynamic coefficient equal to 1.85 (instead of 1.3) when calculating the pavement instead of standard values and take into account the time of the impact of the wheel on the coating of 0.014 s (instead of 0.1 s).