Michigan Lifts Spring Weight Limits Across Lower Peninsula Highways

Truckers heading through Michigan’s lower peninsula can now enjoy fewer springtime restrictions on state roads. As of 6 a.m. on Thursday, April 17, the Michigan Department of Transportation (MDOT) has officially lifted weight restrictions on all state trunkline highways stretching from the southern border up to the Mackinac Bridge.

This move marks a significant update for carriers operating in the region, especially as weather conditions begin to stabilize. These seasonal weight limits are typically in place to protect vulnerable roads during the spring thaw.

What Truckers Need to Know

While the lower peninsula is now restriction-free, MDOT confirmed that weight limits remain in effect for roads north of the Mackinac Bridge. These frost-based restrictions will continue on all trunkline highways in Michigan’s Upper Peninsula until further notice.

Here’s what applies in the restricted zones:

• “All-season” routes, marked in green and gold on the MDOT Truck Operators Map, are not subject to axle weight reductions.
• Oversize loads with extended permits are still allowed on restricted routes. However, single-trip permits for overweight loads or those exceeding 14 feet wide, 11 axles, or 150 feet long will not be granted.
• On “seasonal” routes, shown in red (solid or dashed), posted weight reductions of 25% for rigid (concrete) pavements and 35% for flexible (asphalt) pavements remain in place. Certain vehicles will also be limited to 35 mph in these areas.
• Truckers are reminded to follow speed limits on restricted roads, as required by Michigan law.

“Go online for speed restrictions for trucks and the rules for propane fuel delivery and public utility vehicles.”

Stay Updated

Truck drivers can stay informed by visiting the MDOT website at Michigan.gov/Truckers, where restriction maps and updates are regularly posted. The MDOT Truck Operators Map, which outlines all-season and seasonal routes, is available online. Drivers can also sign up for email alerts to receive real-time updates.

For the latest road restriction info:

• Call 800-787-8960
• New Jersey and Canadian carriers may reach out to 517-373-6256

As spring rolls forward, ensure your route planning accounts for changing road conditions—especially if you’re running north of the bridge.

Source: Truckers News
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