Jackson (1963) has proposed a method of surface dressing design based partly upon ideas put forward by Hanson (1935). This method was used to design a total length of 27 km of experimental sections of surface dressing in Kenya during 1975-77. This report describes the construction, monitoring and performance of the sections during the first 3-4 years trafficking. It is concluded that Jackson's design method works satisfactorily in Kenya conditions over the range of clipping size used in these trials, namely 5 mm to 13 mm average least dimension.