2022 Frost Laws Update.
NDDOT's procedure for initiation of spring load restrictions on the State Highway System is based on the following factors: The state:
Uses load restrictions to reduce damage to roadways caused by heavy loads at a time of year when highway pavements are most vulnerable.
Sets load restrictions as weather and roadbed conditions require and removes these restrictions when roadbeds are stable enough to carry legal weight traffic without damage based on the following sources of information: temperature probes in the base layers of pavement sections, long range temperature forecasts, and a Falling Weight Deflectometer (FWD) that measures the strength of roadway bases and the asphalt pavement surface.
NDDOT Load Restriction Info (best source): https://www.dot.nd.gov/roadreport/loadlimit/loadlimitinfo.asp.
On the page, under Related links, click on Current Load Restrictions Map.
Using the map (select Load Restrictions Proposed) determine the color of route of interest and refer to the table for axle weight limits (see below).
North Dakota Load Restriction Chart (2019)
Using the Ton Mile Fee Schedule you can determine the price per mile for the overweight fine. These permits can range from 500$ to well over 10,000$ so pay attention to the weights. If in doubt about how the weights should be distributed click here (Insert a call to action for our axle spacing's calculator)
This chart will allow you to calculate your overweight costs per trip. There are 2 possible ways you can be charged. Gross Vehicle Weight and Axle Group Weight. You can be charged per group and also the over all GVW, and these charges must be combined to create an accurate permit charge.
Simple Example of how 1 permit can cost 4200$ if you are just driving through ND on the interstate and your loaded GWV is 132K. You’re allowed 48K on your group of 3 (tridems) and your weight is 56K on your two groups of 3, and are legal on your steer (56K +56K=20K=132K). You would need to go to the 3rd chart labeled “Triple Axle Weights” and find your respected weight (the road you referenced in the map). For this example we are going to use “Highways Restricted by Legal Weight” you would look to the side of 56K and In this example you would be charged 4$ per mile per group you travel in ND, resulting in 8$ per mile traveled.
You then have to go to the first chart labeled “Ton Mile Fee Schedule” For GVW, find 132K on the chart and in this example it would be 6$ per mile traveled at this weight. You would then take the 8$ a mile (4$ per tridem group at 56K) + 6$ a mile GVW to receive a total of 14$ per mile in overweight charges. If you travel 300 miles in North Dakota that would cost you 4,200$ in overweight permit fees during frost laws.
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