Select a State:

Oversize Overweight OS/OW Superload
53' trailer length,
8'6" wide, and
13'6" high
80,000 lbs
Exceeding legal
weight and dimension
150' long,
16' wide,
15' high, and
200,000 lbs
Single Trip =
Single Trip =
Single Trip =
TBD upon review
of load description,
origin and destination,
and desired route
When Escorts are Needed: # of Escorts:
On all Highways
Width over 12' to 14' 1 escort
Width over 14' 1 rear
Length over 100' 2 (front and rear)
Height over 15' w/high pole 1 front
Height over 15'5" w/high pole 2 (front and rear)
Overhang over 15' 1 rear
Route survey: Applications for permit in excess of 13'6" in height shall certify that the proposed route has been traveled to assure vertical clearance.

Overhang Requirements:

Maximum legal overhang allowed is 3' (three feet) in front and 4' (four feet) in rear.
Overhang exceeding these dimensions will require a over length permit.

Police Escorts:

Michigan has no established fee base for Police escorts. Load is to be reviewed by D.O.T. at the point it exceeds 150' long, 16' wide, and 15' high, at which point a Police escort may be required and the fee will be generated based on hours, length of trip, and so on.

Permits Valid For:

Single trip Permits are valid for five (5) consecutive days. (Saturday & Sunday are excluded).

Operating Time

Permitted loads are allowed to travel from Sunrise to Sunset, Monday through Friday.

Weekend Travel

Permitted loads that do not exceed 90' long x 10' wide x 14' high are allowed to travel all day on Saturday from Sunrise to Sunset and from Sunrise to 3:00 p.m. on Sundays.  Loads that are overweight ONLY are permitted to travel twenty-four (24) hours a day, Seven (7) days a week.

Divisible Loads

Divisible Loads are allowed as long as additional pieces do not cause load to be overweight, or oversized.  If additional pieces cause over-size dimensions, it must be detached, but can be hauled on the same trailer as long as it does not result in load being overweight.


Permitted loads may be hauled with blades, counterweights, etc. attached.  Blades, and counterweights that are part of the equipment being hauled may be shipped with the load, but buckets and dragline components must be hauled as separate load.

Spring Weight Restrictions

The State of Michigan usually has Frost Laws in effect from February to April.  Normal maximum axle weights allowed on rigid pavement will be reduced by twenty-five (25%).  On flexible pavement the maximum axle weights are reduced by thirty-five (35%)No over-weight permits are issued during Spring Frost Restrictions.

Superload Requirements

Loads or vehicles that are 150' long x 16' wide x 15' high and 200,000 lbs. or more are considered Super-loads.  Applications must be submitted by shipper including a description of load, number of pieces, load dimensions, overall loaded dimensions, weight of object, origin and destination, proposed route, dates of move, reason the load cannot be reduced, reason load cannot be moved by rail or water, and name of Carrier transporting the load (if known).  If load is being permitted for height, applicant must also submit a statement certifying that the route has been surveyed, as well as a copy of the completed route survey.  A drawing/diagram of the load and vehicle will be required as well if the load requires eleven (11) axles or more.  Super-load applications should be allowed up to ten (10) business days for processing and approval.