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4-not local rugged due to excess or lack of stone or plastic. Observed with the naked eye 5-degrees flat road surface plastic spatula (3-5 sections for 1 km; at each cross-section measured at three locations: the heart of the road and road surface edge 1 m). Measured by size 3 m set parallel to the heart of the road (when the continuous construction on a length of 1 km, the need to check in with the international roughness measuring device IRI) observed the gap not more than 5 mm for high level road surface A1Gap not exceeding 7 mm for other types of road surface-(For the A level road surface, IRI 2.80
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