Spring truck weight restrictions on state highways began March 14 for Minnesota's southeast, south and metro frost zones, according to the Minnesota Department of Transportation.

Winter load increases and overweight permits remain in place for the state's central, north-central and north frost zones.

MnDOT limits truck weights to prevent damage to roads weakened during the spring thaw. Ending dates for spring load restrictions will be established by monitoring roadway strength as weather conditions change.

The southeast zone extends south from the southern limit of the metrozone along, but not including, Interstate 35 to the Iowa state line and east to the Wisconsin state line.

Road restriction maps showing the locations of weight-restricted routes and state highways open to maximum 10-ton axle weights are listed at www.dot.state.mn.us/materials. Click on "Seasonal Load Limits," and then "Spring Load Restrictions" for the most up-to-date information.

The information is also available by calling MnDOT's 24-hour automated message center at 1-800-723-6543 in the United States and Canada or by calling (651) 366-5400.