Frost Law Weight Reductions in Wisconsin | Reliable Hauling
Freedom Heavy Haul can offer expedited Pickup and Delivery for any size shipment anywhere in the USA. Contact us today for No Hassle, No Pressure Pricing.
Wisconsin’s roadways face unique challenges during seasonal shifts. Clark County’s 2025 spring regulations begin March 11, enforcing strict axle limits—6 tons per single axle and 10 tons for dual axles under 8 feet apart. Meanwhile, WisDOT activates its frozen road policy December 21, 2024, permitting 98,000 lbs for 5-axle trucks in Zones 1-2.
These measures protect the state’s infrastructure, where paved roads cost $250,000 per mile to maintain. County-specific rules differ from winter allowances, requiring careful planning for commercial haulers. As Clark County Highway Commissioner Brian Duell notes, “Proactive compliance prevents costly damage and delays.”
Understanding the distinction between thaw-related limits and winter increases is critical. We recommend using WisDOT’s interactive map and county permit systems for smooth operations. For more compliance insights, explore our oversized load guidelines.
Understanding Frost Law Weight Restrictions in Wisconsin
Truckers must adapt to shifting load limits as temperatures fluctuate. These rules protect infrastructure while ensuring safe hauling. Below, we break down how seasonal changes impact road use.
What Are Seasonal Weight Restrictions?
Clark County enforces a 6-ton limit per single axle during spring thaws. Statewide, frozen roads allow heavier loads—up to 98,000 lbs for 5-axle trucks. These seasonal weight rules adjust based on ground conditions.
Thaw cycles trap moisture under pavement, weakening roadbeds. A fully loaded 80,000-lb truck triples stress on soft surfaces compared to lighter loads. Counties like Clark classify roads by type, with Class II roads often facing stricter limits.
Why Do Frost Laws Exist?
WisDOT uses frost tubes to measure freeze depth. Once frost reaches 18 inches, frozen ground supports heavier axles. In spring, sunlight heats asphalt, creating unstable moisture pockets.
Winter’s solid ground offers load-bearing benefits. But spring’s thaw turns the same roads vulnerable. Properly timed restrictions prevent costly damage and extend pavement life.
“Frost laws balance safety and efficiency. They’re science-based, not arbitrary.”
Navigating Wisconsin’s Frost Law Regulations
Commercial haulers need precise calculations when navigating seasonal road rules. Clark County’s 300-mile highway network operates under distinct weight limits, while state policies offer conditional flexibility. Below, we break down critical compliance factors.
Weight Limits and Axle Requirements
Clark County enforces a 6-ton single axle limit during spring thaws. Tandem axles under 8 feet apart can carry 10 tons. Compare this to Wisconsin’s frozen-road allowance of 98,000 lbs for 5-axle rigs:
| Jurisdiction | Axle Type | Maximum Load |
|---|---|---|
| Clark County | Single | 6 tons |
| Clark County | Tandem | 10 tons |
| State (Frozen) | 5-Axle Rig | 98,000 lbs |
Winter maintenance vehicles hauling salt are exempt. Bridge limits always supersede these rules.
County vs. State Road Restrictions
County trunks north of US 10 often follow local restriction schedules. Meanwhile, numbered highways adopt state policies when frost depths exceed 18 inches.
“Logging trucks crossing jurisdictional lines must verify limits at each checkpoint. One overloaded axle risks $1,500 fines.”
We recommend using WisDOT’s interactive map to identify boundary transitions. Proactive planning prevents delays.
Permits and Compliance for Seasonal Hauling
Navigating seasonal hauling requires precise permit knowledge. Clark County enforces strict compliance, with no exemptions for essential loads. Meanwhile, Wisconsin’s frozen-road allowances automatically apply to licensed vehicles meeting state criteria.
When Do You Need a Permit?
Clark County mandates permits for all overweight loads during thaw periods. Even emergency shipments need authorization. Key differences from state rules:
- County: 72-hour lead time for applications.
- State: Immediate access for 98,000-lb loads on frozen roads.
Prohibited practices include using expired permits or assuming inter-county reciprocity. Review overweight vehicle requirements for full details.
How to Apply for Seasonal Weight Permits
Clark County’s online portal streamlines submissions. Required documents:
- Vehicle registration and axle configuration.
- Certified scale tickets (last 30 days).
- Route maps avoiding restricted county highway segments.
“One unchecked bridge clearance can derail a shipment. Always verify routes.”
Fines start at $500 per ton for unauthorized loads. We recommend bookmarking the county’s website for real-time restrictions.
Tips for Adapting to Frost Law Restrictions
Staying compliant with seasonal restrictions requires proactive strategies. Check Clark County’s website every 48 hours for updates during thaw periods. Small changes, like adjusting axle spacing to 8 feet, can boost legal load capacity.
Pre-plan routes using WisDOT’s interactive map to identify Zone 1-2 corridors. For heavy loads, consider splitting shipments or securing superload permits. Real-time telematics help monitor weight and ensure route compliance.
We offer permit support and frost law-compliant fleets to simplify operations. Never assume restrictions are lifted without official notices. For urgent needs, contact WisDOT’s permit unit (608-266-7320) or our 24/7 dispatch.
Adapting to changing road conditions keeps shipments moving safely. Explore seasonal load guidelines for more insights.
FAQ
Q: What are seasonal weight restrictions?
A: Seasonal weight restrictions, often called “frost laws,” reduce the allowed load limits on roads during spring thaw. These rules protect pavement from damage when melting temperatures weaken the ground beneath.
Q: Why do frost laws exist in Wisconsin?
A: They prevent costly road damage. As frozen ground thaws, moisture softens the subsurface, making highways more vulnerable to heavy loads. Temporary limits preserve infrastructure.
Q: How do weight limits change during restrictions?
A: Loads may be reduced by 5–15 tons, depending on axle configurations. County and state highways often have different limits, so always check current postings.
Q: Are permits available for exceeding seasonal limits?
A: Yes, but only for essential shipments. The Wisconsin DOT issues single-trip permits with strict routing requirements during restriction periods.
Q: Where can I find active restriction maps?
A: The Wisconsin DOT website provides real-time maps showing affected routes. County highway departments also post updates for local roads.
Q: How long do these restrictions typically last?
A: Duration varies yearly based on weather, but most apply from late February through April. Warmer regions may lift rules earlier than northern counties.
