Although traffic counting on rural roads in South Africa started in 1938, such counts have tended to be haphazard. The adoption by the Natal Provincial Administration of methods which had been brought up-to-date after many years of experience in the United States, amended to suit Natal conditions, was an example which should be followed by all road authorities.
The Authors had undertaken a very interesting series of tests, but there were many gaps in their report on the tests 'which it would be highly desirable to fill. They had correlated values of the elastic modulus, column strength, tensile strength, and modulus of rupture with the cube strength of a concrete, but nowhere in their paper was it specifically stressed that the relationships were not of general application but applied only to one specific set of test conditions. Furthermore, the particular conditions under which the tests were carried out were not descriptionbed in the paper, so that it was difficult to integrate their work with that of other investigators.