The document discusses evaluating skid resistance on national roads in the Podlaskie province of Poland. Skid resistance is the ability of a road surface to resist the relative motion between the tire and pavement, which is important for safety. It is characterized by the coefficient of friction and is crucial when roads are wet, as it affects braking distances and vehicle stability when turning. Many dangerous areas on roads with high traffic, such as roundabouts and pedestrian crossings, are at risk of skidding. The thesis will study and evaluate the properties of skid resistance on selected national roads in the province from 2008 to 2013 using an SRT-3 device to measure the coefficient of friction in wet conditions during braking.