"Not only have humans and animals been impacted by the cold, but our roadways have also suffered from this year's brutal winter. The record cold temperature has created a large number of new and wider cracks in pavements. As temperatures warm and the snow thaws, we are seeing new and high severity potholes every day. The challenge is how to patch these enormous numbers of potholes effectively so that the patches last longer. This task is not that simple as we think.

"In a Minnesota Department of Transportation-funded research study, the University of Minnesota Duluth has developed a best-practices manual for patching potholes for asphalt pavements. This manual suggests the most effective patching method for potholes, based on the location, area, depth of pothole and season. This manual has simple and easy-to-use decision trees and is available in the form of flash cards and posters. Maintenance crews can determine the most effective patching method for their job, and also can refer the guidelines on the pothole preparation, placement and compaction, and moisture-abatement procedure."

- Manik Barman, an assistant professor in the Swenson College of Science and Engineering at the University of Minnesota Duluth and a scholar with the Center for Transportation Studies, in a statement distributed by the University of Minnesota last week (Barman's scholarly focus is on pavement design, rehabilitation, and maintenance. He is currently researching pavement rehabilitation and maintenance issues, fiber-reinforced concretes for long-lasting pavement rehabilitation, and asphalt mixtures for low-volume roads.)