1998 AGN APR 21 I19 - Laserfiche WebLink

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FXN1��T � PAVE1bIENT CONDITION REPORT Data Calculation W5 Pavement condition data is calculated using different kinds of equipment. The d ct a used The* W5, or the 5th sensor reading, is used to This m calculating deflection` data. is machine applies a far determine when Marshy subgrades exist. When the load on the pavement and the deflection of thvalue exceeds 1.0 an e "M" Pavement type is Pavement's measured by five sensors spaced at eq established. distances to each other. This sensor data is then %SP Processed to obtain various condition numbers which are shown in -I. Pavement Condition Detailed Report The %SP, or Percent of SpreadabiIi value and II. Pavement Condition Overview Report, as the pavement spreads a load over a wider area. The surface of the pavement is typically ..tested using The more rigid a pavement, the higher is its spreadability, the Laser Road Surface Testes (RST). This device consists of various sensors and lasers specialized for Crack collecting data related to surface distress.`This data is augmented by subjective analysis. Data on cracking, rutting, roughness (ride quality) and environment is calculated during the surface condition survey. This data is then processed to produce various condition numbers which are shown in the Pavement Condition Reports. I. PAVEMENT CONDITION - DETAILED This report gives detailed information about each individual section of pavement. Fields in this report include DMD, SCI, BCI, W5, %SP, CRACK, RUT, RQ, and Pavement Type. f1 RE The maximum deflection under the load is corrected based on the temperature of the pavement at the time of the test yielding the DMD or Dynaflect Maximum Deflection. The DMD is a representation of how the overall pavement is responding to vertical loads. 5-01 The SCI, or Surface Curvature Index, is a representation of the strength of the upper layers of the pavement. BCI The BCI, or Base Curvature Index,is a representation of the relative strength of the lower layers of pavement. Cracking is categorized by the RST according to its width and depth. These crack counts are supplemented with subjective measures in order to form a crack condition number. This number ranges from 10 to 100 where 100 is the best_ Rut An average rut depth for the section is calculated in real time by the RST. A percentage of distance where the rut exceeded 10 mm and 20 mm is also recorded which allows analysis of localized ruts. These figures are combined using an algorithm which yields a RUT condition number between 10 and 100 where 100 is the best. R# Average IRI (International Roughness Index) is calculated for each section. The Pavement Condition Module converts this figure to a 10 to 100 scale where 10 is an extremely rough road and 100 is a very smooth road. Pavement Tv ne Based on behavior of the pavement structure; the pavement management program classifies pavements into six categories: F - Flexible FG - Flexible Deep Granular S - Stablilzed SG Stabilized Deep Granular R - Rigid MR,MS,MF Marshy