"Effective Monday, March 30, 2026 at 6:00 am, weight restrictions will be lifted from the southern Michigan border north to and including US-10 in Ludington, Mason County from the M-116 intersection then east to US-127 in Clare County then south to US-10 in Clare County then East on US-10 to M-25 in Bay City, Bay County and including the entire thumb area. Frost restrictions are still in effect for the remainder of the state and will be imposed and enforced on all state trunkline highways north of the US-10, M-25 line."
| Field | Detail |
|---|---|
| Status | ACTIVE Restrictions in effect on all state trunklines north of US-10/M-25 line (including entire Upper Peninsula); lifted south of that line including entire thumb area |
| Status Timestamp | March 30, 2026 at 6:00 AM (Bulletin #3 effective time) |
| Coverage | State trunkline highways only (M, I, and US designations). Local roads are not covered by this bulletin. |
| Effective Dates | Season opened February 17, 2026 (Bulletin #1). Bulletin #3 partially lifted restrictions effective March 30, 2026. No end date specified. |
| Weight Limits | Seasonal routes (red on MDOT map): 25% reduction on rigid pavement; 35% reduction on flexible pavement. All Season routes (green or gold): no reduction. |
| Key Roads | Restricted (north of US-10/M-25 line): All state trunklines north of US-10 (Ludington/Mason County via M-116 east to US-127/Clare County, south to US-10/Clare County, east on US-10 to M-25/Bay City/Bay County); entire Upper Peninsula. Lifted (south of line): All state trunklines south of that corridor, including the entire thumb area. |
| Exemptions | Extended permits valid for oversize only (not overweight) in restricted area. Single-trip permits will not be issued for overweight loads, loads over 14 ft wide, loads over 11 axles, or loads over 150 ft overall length in the restricted area. All Season routes (green or gold) carry no weight reduction. |
| Penalties | Not specified |
| Contact | MDOT: 1-800-787-8960 | Canada/New Jersey callers: 517-335-0023 | www.michigan.gov/truckers |
| Primary Status Source URL | https://mdotjboss.state.mi.us/APSWB/SWBHome.htm?bulletin=weight |
Weight Limits by Route Type
| Route Classification | Map Color | Pavement Type | Weight Reduction |
|---|---|---|---|
| All Season Routes | Green or Gold | All | 0% No reduction in legal axle weight |
| Seasonal Routes | Solid or Dashed Red | Rigid | 25% reduction |
| Seasonal Routes | Solid or Dashed Red | Flexible | 35% reduction |
Use the MDOT Truck Operator's Map to identify route classification before dispatch.
Bulletin History & Current Coverage
Bulletin #1 February 17, 2026 (Superseded)
- Effective: February 17, 2026 at 6:00 PM
- Area: Indiana/Ohio border north to US-10 in Ludington (Mason County) from M-116 east to US-127 in Clare County, north on US-127 to M-61, east on M-61 to US-23 in City of Standish, Arenac County
- Status: Superseded by Bulletin #2
Bulletin #2 March 9, 2026 (Superseded)
- Effective: March 9, 2026 at 6:00 AM
- Restrictions lifted on all state trunklines south of the M-43 / US-131 / I-94 / US-23 / I-96 / M-59 corridor
- Status: Superseded by Bulletin #3
Bulletin #3 March 30, 2026 (Active)
- Effective: March 30, 2026 at 6:00 AM
- Restrictions lifted on all state trunklines south of: US-10 in Ludington, Mason County from the M-116 intersection east to US-127 in Clare County south to US-10 in Clare County east on US-10 to M-25 in Bay City, Bay County including the entire thumb area
- Restrictions remain active on all state trunklines north of the US-10/M-25 line, including the entire Upper Peninsula
- No end date specified
Permit Restrictions in Weight-Restricted Area
- Extended permits are valid for oversize only not overweight within the restricted area
- Single-trip permits will not be issued for overweight loads
- Single-trip permits will not be issued for loads exceeding 14 feet in width
- Single-trip permits will not be issued for loads exceeding 11 axles
- Single-trip permits will not be issued for loads exceeding 150 feet in overall length
Contact & Resources
- MDOT Permit Office: 1-800-787-8960
- Canada / New Jersey callers: 517-335-0023
- Truckers portal: www.michigan.gov/truckers
Source
Primary source: MDOT Spring Weight Bulletin https://mdotjboss.state.mi.us/APSWB/SWBHome.htm?bulletin=weight
Retrieved: March 30, 2026 at 00:00 UTC
Status observed: March 30, 2026 at 6:00 AM (Bulletin #3 effective time)
This page covers state trunkline highways (M, I, US designations) only. Local road restrictions are not addressed by this bulletin.
