The Minnesota Road Research Project (Mn/ROAD) is the world's largest and most comprehensive outdoor pavement laboratory, distinctive for its electronic sensor network embedded within six miles of test pavements. Located 40 miles northwest of Minneapolis/St. Paul, its design incorporates 4,572 electronic sensors. The sensor network and extensive data collection system provide opportunities to study how heavy commercial truck traffic and the annual freeze/thaw cycle affect pavement materials and designs.

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