Seasonal Load Limits - Decision Support

Office of Materials &
Road Research

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Seasonal
Load Limits

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Data Streams Influencing Decision Making

Pavement Aggregate Base Temperature(F) Maps at 18 inches of depth help to determine winter load increase and spring load restriction starting and ending dates

Cumulative Freezing Index (CFI) Maps help to determine winter load increase starting dates

Cumulative Thawing Index (CTI) Maps help to determine winter load increase ending dates and spring load restriction starting dates

Frozen Pavement, Base, and Subgrade Profiles help to determine winter load increase and spring load restriction starting and ending dates

Subgrade(18")

Cumulative Freezing Index

Cumulative Thawing Index

Frozen Profiles

2011-2012

Frozen Profiles

RWIS and NWS Locations


	Office of Materials & Road Research • E-mail: MaterialsLab.DOT@state.mn.us • 1400 Gervais Avenue • Maplewood, MN 55109-2044 • Phone: (651) 366-5592 • FAX: (651) 366-5461
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	Last Updated: Tuesday, October 25, 2011 - 4:03:02 p.m. Central Daylight Time