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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.