Mary McKenna reports that winter truck load increases have started on unrestricted highways in the north-central frost zone, according to the Minnesota Department of Transportation. Vehicles will be allowed to operate up to 10 percent over the standard legal limit. Drivers must check with local agencies before increasing any weights on city, county and township routes, and trucks must still comply with current registration weight laws. Frost zones can be found on the Minnesota DOT load limits map. Air date: Dec. 4, 2018.