Pavement Condition Survey

Pavement Condition Survey

RAS utilizes automated Roadway Asset Collection (RAC) vehicles to conduct pavement condition surveys that typically follow the ASTM D6433 standards. The RAC vehicles are equipped with a second-generation Laser Crack Measurement System (LCMS-2) used for automated pavement data acquisition, 360⁰ camera for ROW Asset capture, and a certified Class I Inertial Profiler for roughness and ride measurement also known as the International Roughness Index (IRI).  

The pavement data is processed per road segment for the entire roadway network using the continuous 20-foot linear samples acquired by the RAC Laser Crack Measurement System (LCMS-2) vehicle.  RAS adopts an agency's existing GIS centerlines and the detailed 20-foot level data collected by the RAC vehicle is eventually rolled up to the segment level for reporting purposes.

RAS' RoadTRIP™ software was specifically designed to analyze the high-resolution and laser illuminated LCMS imagery for post processing of the detailed pavement distress data. RAS can process the data according to nearly any industry standard and often calculates the following condition indices: ASTM D6433 Pavement Condition Index (PCI), Overall Condition Index (OCI), Pavement Quality Index (PQI), and Institute for Transportation Research and Education (ITRE). 

RAS has a fleet of four automated RAC Vehicles each equipped with: 

• LCMS-2 camera is a downward facing laser array providing images used to evaluate data that conforms with the ASTM D6433 or a client specified protocol. The cameras provide a customized digital condition rating system to collect user defined severity/extent-based pavement distresses. The collection system is able to capture full lane width 3D imagery, full width measurements, rutting, and roughness data. 

• Point Gray Ladybug 5+ 32 MP 360-degree High-Definition camera (utilized for accurate ROW asset capture, extraction, and pavement QA/QC) is far superior to multiple independently mounted HD cameraa. 

• A class 1 inertial profiler for simultaneously capturing dual-wheel path (left and right) IRI measurements to the hundredth inch, in accordance with AASHTO R48. The profiler has gone through ASTM E-950 certification and was independently certified by Texas A&M Transportation Institute (TTI).