dus 1998 2018 standard test method for measuring the skid resistance of pavements and other trafficked surfaces using a continuous reading fixed-sli technique first edition. this draft uganda standard covers the measurement of the skid resistance of a pavement or other trafficked surface using the continuous reading fixed-sli technique. this test method covers braked wheel measurements obtained with less than 100 slip. it does not cover side force measurements. this test method provides a record of the skid resistance along the whole length of one track of the test surface and enables averages to be obtained for specified test segments. this test method is used to measure skid resistance on a wide variety of surfaces in a wide variety of circumstances. consequently there are many different designs of continuous reading fixed-sli measuring equipment cfme and as many different test procedures governing their use. this test method does not attempt to detail these different equipments and procedures but does set out the essential common principles. cfmes function by creating and measuring a frictional force between a test tire operating at a selected sli and the test surface. different types of cfme do not necessarily create the same frictional force between their particular test tire and a common test surface and do not necessarily use the same method to measure this frictional force. cfme measurements are obtained at a selected steady test speed. this speed may vary according to the application. the test surface may be contaminated or clean and dry. if it is clean and dry a measured amount of water is normally deposited on the surface just in front of the test wheel. the measuring apparatus may be built into a vehicle built into a trailer that is towed by a vehicle or built into a device that is manually pushed. the values stated in either si units or inch-pound units are to be regarded separately as standard. the values stated in each system may not be exact equivalents therefore each system shall be used independently of the other. combining values from the two systems may result in non-conformance with the standard.