This article describes the approbation of the humidity sensor in the real operating conditions of the road. The authors have developed a protective design of humidity sensors that meets the requirements for their laying in the ground floor, developed a mobile portable data reader. The technology of calibration, calibration and laying of sensors in the soil of the roadbed is presented. The analysis of the data obtained after calibration of the sensors.
Keywords: the soil subgrade, moisture monitoring in the conditions of the road, the humidity sensors