Select a State:

Oversize Overweight OS/OW Superload
53' trailer length,
8'6" wide, and
14'6" high
80,000 lbs
Exceeding legal
weight and dimension
120' long,
18' wide,
18' high, and
156,000 lbs.
Single Trip =
Flat Fee
Round Trip =
Single Trip =
Flat Fee
Round Trip =
Single Trip =
Flat Fee
Round Trip =
Single Trip =
$10.00 + additional fees
may exist
based on review of
diagram showing
spacing and route*

*Escorts and bridge analysis may add additional fees on to standard $10.00 Superload fee.

When Escorts are Needed: # of Escorts:
On 2 Lane Highways
Width exceeds 1/2 roadway width
up to and including 14'6"
1 escort
On Interstate
Width exceeds 14'6" - 16'6" 1 escort
On All Highways
Height exceeds 14'4" (high pole must be
carried on the escorts vehicle)
1 escort
Length exceeds 120' 1 escort
Either 1 escort or 7" high and 7" diameter amber light of 100 candlepower with 360 degree visibility (or strobe light) Counted on the towing unit is required when:
Height over 14'6" 1 (must be allowed at least 3' clearance to actual height
of restrictions on the route)
Applications for width over 16' Need detailed route survey
Height over 17' must provide a letter from the utility company stating their knowledge of the move and approval to disturb aerial lines across the route.If no aerial line exist, must have a statement that the entire route has been checked and no utilities are affected.
Front end projections exceed 25'
Rear end projection exceeds 10'(amber revolving light or
strobe light must be on the rear of the load when
rear-end projection exceeds 10'
Weight exceeds 80,000 lbs
Some superloads - require Iowa DOT officer as escort -
charge is $250/day maximum ($25.00 required time and $40.00/hr overtime)
need to schedule several days in advance.
Special lighting can be used in lieu of an escort
if travel is on certain roads.

Holiday Restrictions - Iowa does not establish Holiday restrictions for full year in advance. Restrictions for each holiday are made available closer to actual date.

Overhang Requirements:

Maximum legal overhang allowed is 4' (four feet) in rear. Overhang must be flagged
during the day and lighted at night. Overhang exceeding these dimensions will require
over length permits.

Permits Valid For:

Single Trip Permits are valid for five (5) days.

Operating Time

Permitted loads are allowed travel from one-half hour before sunrise to one-half hour after sunset.  Travel is allowed twenty-four (24) hours a day, Seven (7) days a week  on vehicles not exceeding 100' long, 11' wide, and 14'4" high.

Weekend Travel

Permitted loads are allowed to travel all day on Saturday and Sunday in the state of Iowa.

Divisible Loads

Loads should be broken down in dimension and weight as far as possible.  Components and attachments may be hauled on the same load as long as they do not result in the load being overweight, or oversized.


Blades, buckets, counterweights, etc. do not have to be removed when they cause the load to be oversized.  Only when attachments cause a load to be overweight must they be removed, and hauled separately.

Restricted Travel

Travel is prohibited on Des Moines I-235 from 7:00 - 9:00 a.m. and from 4:00 - 6:00 p.m. Monday through Friday.  Roads must be clear and must have + mile visibility in order to travel.

Spring Weight Restrictions

The State of Iowa implements Seasonal Weight Restrictions at the discretion of the Motor Carrier Services Division.  All Seasonal Weight Restrictions will be updated on this page at the time of announcement.

Superload Requirements

Loads or vehicles that are 120' long, 18' wide, 18' high, and 156,000 lbs. or more are considered Super-loads.  A diagram/drawing of the item being shipped, and axle spacing is required at the discretion of the Department of Transportation.  Super-load applications should be allowed between two (2) and five (5) business days for processing and approval.