Rut depth measurement

Ruts generally appear due to the wear and weak load bearing capacity of the road structure. If ruts have appeared due to one of those reasons then water run-off is hindered and aquaplaning may occur. This test method describes the procedure for the measurement of the depth of the rut at a chosen location in a pavement surface using a straightedge and a gauge. The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in parentheses.

Typically rutting is reported in terms of rut depth. The term stuck in a rut can be used figuratively to refer to a situation in which, as time progresses, the situation is unable to be changed or steered in a desired way. Rut depths were measured with several devices before a trench was cut across the traffic lane. Careful measurement of each pavement layer was done to determine the amount of rutting in each layer. Australian Journal of Civil Engineering.

The ROMDAS Laser Rut Measurement System (LRMS) gives immediate and precise transverse profiles used for the detection and characterization of pavement rutting conditions. The ROMDAS LRMS uses scanning laser technology from INO (a world leading technology developer and provider of 3D laser systems and sensors). One of the best combinations of cost efficiency and high accuracy on the market.

Robust for use in the toughest conditions. Easily installed and removable when not in use. The progressive increasing differences for all the three rutting shapes can be observed. For small and medium rut depth levels , the average difference is below 1. However, much higher differences (up to mm) can be found for larger rut depth (mm).

Repeatability of measurement is found to be such that on average per cent or more of the repeat measurements differ by 1. Criteria for rut depth derived from existing maintenance criteria are presented for use with the high-speed system. The rut depth mea- surement is defined as the maximum distance from the bottom of the straightedge to the pavement surface. D line laser and the point-based rut bar systems.

The laser rut measurement system (LRMS) is a transverse profiling device that detects and characterizes pavement rutting. The LRMS can acquire full 4-meter width profiles of a highway lane at. A strong linear relationship was identified in all instances, with R2above 0. More recently, point-based bar systems (e.g., points) have been used by some agencies.

Due to the highly variable measurement of rut depth using the three- or five-point metho consistent year-to-year measurements may be diffi-cult to achieve. The most widely used rut bars. The bottom surface of the gage shall be at least mm (in.) but not more than mm ( in.) wide and span areas of aggregate loss and texture. The gage shall have sufficient range to accommodate the measurement. The rut bar yielded zero rut depth in of cases in which ruts were deeper than mm.

The relationship between pavement rut depth and the visual deformation value of measurement points on the rut laser curve is determined by the calibration blocks, and then the pavement three-dimensional (3D) rut depths can be automatically measure 3D rut depth curves and 3D rut surface can be reconstructed. The focus of this article is how rut depths are measured to determine their capacity to hold water. This implicitly assumes that pavement performance is uniform along the length of the test strip.

The of a study to calibrate the acoustic rut measurement system of the New Jersey Department of Transportation’s (NJDOT's) Automatic Road Analyzer (ARAN) are presented. Shortly after purchasing its ARAN unit, the NJDOT collected roughness, rut depth and distress data on New Jersey‘s Interstate highway system. Pavement cross sections collected at 4-in.

Measurements are typically taken at 1-ft intervals, but other intervals can be used. Pavemetrics’s laser rut measurement system (LRMS) is a transverse profiling device that detects and characterizes pavement rutting. Rut depth and type (short, multiple and long radius) is evaluated.