Legal truck weight limits that were increased during the winter months in Minnesota will end next week and spring weight restrictions will begin.Spring truck weight restrictions begin in the south, southeast and Twin Cities Metro frost zones at 12:01 a.m. tomorrow.Spring weight restrictions in the central, north-central and north frost zones begin at 12:01 a.m. on Tuesday.No overweight truck permits are issued during the spring load restriction period.MnDot says these restrictions are used to help preserve pavements that lose strength due to thaw conditions and trapped water.For more information about the department's seasonal load limits and locations of weight-restricted routes call 1-800-723-6543.