Site | Sampling |
A | The locations of test pits were strategically selected at areas that exhibited certain defects while at the same time distributing the tests pits equally among the uniform sections. |
B | Five test pits were identified consisting of different types of failures varying in extent and degree. Three additional test pits were also identified in areas where no failures occurred. |
C | The test pit was located at an area that exhibited certain defects. |
D | A centerline survey was conducted over the full length of the road section. The test pits were more or less 1 km apart in the outer wheel path in either Northbound or South bound lane so as to not hinder the daily traffic flows. |