APRoad100mID Unique ID for 100m road segment ROAD_SECTION_ID TMR road section ID CARRIAGEWAY_CODE 1 for single carriageway, 2 for dual carriageway gazettal direction, 3 for dual carriageway anti-gazettal direction TDIST_START 100m segment start distance from the road section start in gazettal direction TDIST_END 100m segment end distance from the road section start in gazettal direction SEGMENT_LENGTH length of segment NAASRARoughness average roughness of 100m segments - NAASRA count IRIRoughness average roughness of 100m segments - IRI RoughnessSurveyDate survey date RoughnessClass classification of roughness into 5 bands (see table below) Longitude longitude of segment midpoint Latitude latitude of segment midpoint MeasureClassField NAASRA RoughnessRoughnessClass NAASRA RoughnessRoughnessClass NAASRA RoughnessRoughnessClass NAASRA RoughnessRoughnessClass NAASRA RoughnessRoughnessClass NAASRA RoughnessRoughnessClass NAASRA RoughnessRoughnessClass