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Research Reports

Load Restriction Determination Study


The project identified various highway roadways subjected to load restrictions for cataloguing on a District-wide map. An investigation of freeze-thaw events and pavement deflections was conducted in addition to collection of weather data at selected sites. "Frost Tubes" were evaluated and found to be an effective tool for measuring frost depths. Limited data was collected due to warm winters and short freeze-thaw cycles. It was concluded that load restrictions are not needed until the temperature changes to a warming period. Additional research is needed to determine when load restrictions should be removed.


  • Date Published: September, 1980
  • Publication Number: WA-RD 40.1
  • Last Modified: August 5, 2007
  • Author: K. Whalen.
  • Originator: Washington (State). Dept. of Transportation.
  • # of Pages: 38 p., 717 KB (PDF)
  • Subject: Deflection, Depth, Freeze thaw durability, Frost, Highways, Load limits, Maps, Measuring instruments, Pavements, Temperature, Weather.
  • Keywords: Frozen pavement, freeze-thaw, load restrictions, frost tubes.
  • Related Publications:

This abstract was last modified April 29, 2008