Abstract
This study examines skid resistance of grooved airport runways in wet condition. It deals with these factors influencing the measurement such as adhered rubber, water film thickness, temperature and texture by the field measurements and laboratory tests. The following conclusions are obtained.
1) The friction coefficient in the touch-down area is smaller by 30-50% than that in mid-runway.
2) The friction coefficient in summer is smaller by 10-20% than that in winter.
3) As a remedy for obtaining the sufficient skid resistance, the removal of the tire rubber is effective.
4) The friction coefficient measured by vehicle type equipment can be estimated by the use of handy type equipment.
