2020 Idaho winter frost/spring thaw laws and seasonal weight restrictions. See also:Tire chain laws. Tire chain laws by location. Trucking regulations. Federal bridge formula. Exemptions from seasonal restrictions. Page 1 of 11 By WLSADMIN on August 22, 2019 / Canada Shipping Regulations., Frost law restrictions. / Leave a commentTags: frost, Idaho, laws, restrictions, trucking, weight Previous Post2020 Frost winter frost laws, thaw laws and weight restrictions. Next Post Iowa frost law restrictions.