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City of Tucson

March 6th, 2007

For the City of Tucson, utilization and automation of the Automated Road Analyzer (ARAN) systems has replaced labor intensive distress analysis and sampling usually performed by personnel in the field. This has eliminated unnecessary work and greatly reduced the overhead by discontinuing manual field inspections. The concurrent viewing of video log, distress, and GPS data makes this possible.

The City of Tucson has been using the ARAN since 1998 to record International Roughness Index (IRI) data, lane inventories, and Photographic Analysis of Asphalt Surfaces for Survey Evaluation Ratings (PA²S²ER) of distresses. The City’s ARAN is configured to collect distance measurements (DMI), IRI using the Laser South Dakota Profile (Laser SDP), and 3-point rutting. Two cameras collect calibrated digital images and positioning data is recorded by the Position Orientation System for Land Vehicles (POS LV) and grade measurement subsystems. Positional information is fed into Roadware’s Surveyor (v 1.0) software to perform asset inventories.

According to Todd Kessler, Senior Engineering Associate with the City of Tucson's Streets Division, the ARAN has streamlined the City’s pavement rating process. Using the ARAN, the City is able to accomplish in two to three days the same tasks that used to take two weeks. The City of Tucson continues to expand its data collection and analysis program in order to utilize more information in decision making processes, and the ARAN is the key to making this possible.