Minnesota Road Research Project Mainline Maintenance Observations and Test Track Lessons Learned, 2003–2006

The Minnesota Department of Transportation (MnDOT) built the Minnesota Road Research Project (MnROAD) between 1990 and 1993. Over the years the environment and traffic have caused the hot-mix asphalt test cells to both crack and rut, affecting the ride. In 2003 MnROAD performed a number of maintenance treatments to improve the ride quality until future reconstruction could be scheduled and to evaluate different maintenance treatments and their effectiveness. MnROAD and the Office of Maintenance used this opportunity to provide detailed pavement performance evaluations on the effectiveness of surface treatments and how pavement engineers can use them. An opportunity to try both experimental and existing techniques and materials targeted for use in northern climates was also offered. This can assist in selecting “the right treatment for the right road at the right time.” Slurry seals were placed in 2003 and the performance has been tracked. Treatments included both one and two lift slurry seals consisting of microsurfacing, placed by a contractor using a 12-ft box machine; and MiniMac, placed by MnDOT crews using a 6-ft box machine owned by MnDOT. One cell used a combination of both systems. Transverse crack repairs were also studied using two types of mastics along with the slurry from the MiniMac to fill cupped areas around the crack. Some of the cells may have deteriorated past the point of placing a preventive maintenance treatment but still provided an excellent opportunity to observe performance. Lessons were also learned about the use of an accelerated pavement test track to evaluate maintenance treatments.


  • English

Media Info

  • Media Type: Web
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 60-69
  • Monograph Title: Use of Accelerated Pavement Testing to Evaluate Maintenance and Pavement Preservation Treatments
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01143670
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Nov 2 2009 4:56PM