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Seattle DOT

September 16th, 2005

In the years leading up to 2003, Pavement Management at the City of Seattle was proceeding at a less-than-optimal priority level; existing pavement condition data was outdated and its accuracy was considered suspect. However, in the summer of 2003, the City decided to kick-start its pavement management program by hiring a full-time project manager and issuing an RFP to collect current and accurate pavement condition data. Roadware was selected as the vendor of choice, and the City eliminated manual pavement condition rating in favor of an automated method (the ARAN) to provide for greater network coverage.

Roadware surveyed approximately 1,240 lane miles, georeferencing, videologging and rating the condition of the pavement. Data was imported directly into Seattle’s MTC PMS software environment, and a new Pavement Condition Index (PCI) was calculated for each section. This allowed Seattle to begin prioritizing maintenance programs based on up-to-date and accurate data.

Details of the data collected for this project are:  

Pavement Data

  • Transverse profile (Rutting) for each wheel-path (for asphalt pavements)
  • Faulting (for concrete pavements)

Pavement Distress

  • Surface distress data (cracking) in compliance with MTC rating protocols, processed using Roadware’s DV-Rate semi-automated method

Georeferencing and Geometric Data

  • GPS and distance as references for all measurements and reports
  • Right-of Way Videologging and Asset Inventory
  • Panoramic digital video - 3 forward facing cameras (1,300 x 1,030 pixel resolution)
  • ROW images combined with pavement data and displayed using Roadware’s VisiData image display software with GPS mapping for display of the collected data as a layer on top of the City’s base map  

Several challenges were identified throughout the project and Roadware and Seattle DOT worked collaboratively to resolve them. In the words of Charles Bookman of SDOT, “All of these challenges were addressed and resolved. More importantly, they were addressed and resolved promptly…within the time and budget constraints of the project.”