Rebirth of Chip Sealing in Minnesota

Chip sealing is a common form of pavement preservation used by most cities and counties and by the Minnesota Department of Transportation (MNDOT). MNDOT, working in partnership with the Minnesota Local Road Research Board, was able to rejuvenate the chip seal program in Minnesota. Efforts to improve the performance of chip sealing as a pavement preventive maintenance treatment are discussed. The discussion covers chip seal design, aggregate characteristics, and training efforts, and the successes of MNDOT, counties, and cities are documented.