I indicate the road should and must be posted. Then, using the suggested documentation, they can determine the best thresholds for all or groups of their roads. These criteria are best suited for use during the start of the spring thaw period, generally February through April. A different condition exist for mid-winter thawing cases. However, the WSTC researchers did not develop a specific value.
Local experience remains the best basis for mid-winter restrictions.
The analysis performed in the study showed more consistent results for this soil type than for course-grained soils. When a highway agency sets a load restriction, it should notify the public through the press or letters. It should place temporary signs on all limited roadways. It is recommended that agency staff individually notify contractors and loggers who frequently use the affected roads. If the agency has a policy for partial road use, such as early morning for certain roads, it should provide affected users with the procedures to apply the policy.