Michigan OSOW Permit Guide

Michigan Oversize Permits

Michigan Oversize Permits

Michigan Oversize Permits

Michigan oversize permits are valid for five travel days. Atlantic Unity helps carriers plan Michigan permits, bridge crossings, county curfews, spring weight restrictions, lift axle rules, legal dimensions, routine limits, escorts, signs, flags, and lights.

Michigan oversize permits are valid for five travel days. Atlantic Unity helps carriers plan Michigan permits, bridge crossings, county curfews, spring weight restrictions, lift axle rules, legal dimensions, routine limits, escorts, signs, flags, and lights.

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Quick summary

Quick summary

Five travel days. Daylight travel. Bridge and seasonal rules.

Michigan rules include sunrise-to-sunset travel, limited weekend daylight movement, peak-hour county restrictions over 12′ wide or 90′ long, Mackinac and Ambassador Bridge coordination, 13′-6″ legal height, 150′ routine length, 16′ routine width, 15′ routine height, and route survey/escort needs over 15′ high.

Permit validity

Permit validity

Michigan oversize permits are valid for five travel days. Atlantic Unity helps carriers plan Michigan permits, bridge crossings, county curfews, spring weight restrictions, lift axle rules, legal dimensions, routine limits, escorts, signs, flags, and lights.

Operating time

Operating time

Michigan rules include sunrise-to-sunset travel, limited weekend daylight movement, peak-hour county restrictions over 12′ wide or 90′ long, Mackinac and Ambassador Bridge coordination, 13′-6″ legal height, 150′ routine length, 16′ routine width, 15′ routine height, and route survey/escort needs over 15′ high.

Key restrictions

Michigan rules include sunrise-to-sunset travel, limited weekend daylight movement, peak-hour county restrictions over 12′ wide or 90′ long, Mackinac and Ambassador Bridge coordination, 13′-6″ legal height, 150′ routine length, 16′ routine width, 15′ routine height, and route survey/escort needs over 15′ high.

Superload review

Superload review

Michigan rules include sunrise-to-sunset travel, limited weekend daylight movement, peak-hour county restrictions over 12′ wide or 90′ long, Mackinac and Ambassador Bridge coordination, 13′-6″ legal height, 150′ routine length, 16′ routine width, 15′ routine height, and route survey/escort needs over 15′ high.

Operating rules

Operating rules

When permitted loads can travel in Michigan

When permitted loads can travel in Michigan

Permit validity

Permit validity

Georgia oversize permits are valid for ten days. If a load requires continuous travel, that request should be made when the permit is ordered.

Georgia oversize permits are valid for ten days. If a load requires continuous travel, that request should be made when the permit is ordered.

Standard travel window

Standard travel window

Permitted loads may generally operate from one-half hour after sunrise until one-half hour before sunset, seven days a week. Loads at or below 125,000 lbs. with legal dimensions may be eligible for continuous travel when requested in advance.

Permitted loads may generally operate from one-half hour after sunrise until one-half hour before sunset, seven days a week. Loads at or below 125,000 lbs. with legal dimensions may be eligible for continuous travel when requested in advance.

Restricted travel

Restricted travel

Georgia does not allow permit movement on major holidays. Atlanta-area movement inside and including I-285 is restricted during weekday rush hours from 7:00–9:00 am and 4:00–6:00 pm.

Georgia does not allow permit movement on major holidays. Atlanta-area movement inside and including I-285 is restricted during weekday rush hours from 7:00–9:00 am and 4:00–6:00 pm.

Planning note

Planning note

Because city, holiday, escort, and daylight rules can affect dispatch, Georgia oversize permit planning should begin before a truck is committed to the route.

Because city, holiday, escort, and daylight rules can affect dispatch, Georgia oversize permit planning should begin before a truck is committed to the route.

Michigan legal dimensions and weights

Michigan legal dimensions and weights

Length

Length

75′ including overhang is legal with a 48′–53′ trailer; 60′ overall applies on some non-designated routes.

75′ including overhang is legal with a 48′–53′ trailer; 60′ overall applies on some non-designated routes.

Width

Width

8′-6″ is generally legal; 8′ may apply on some non-designated roads.

8′-6″ is generally legal; 8′ may apply on some non-designated roads.

Height

Height

13′-6″ is the standard legal height limit in Georgia.

13′-6″ is the standard legal height limit in Georgia.

Weight

Weight

80,000 lbs. gross is legal; single axle 20,340 lbs.; tandem 34,000 lbs.; tridem depends on spacing.

80,000 lbs. gross is legal; single axle 20,340 lbs.; tandem 34,000 lbs.; tridem depends on spacing.

Routine permit limits

Routine permit limits

When a Michigan load becomes a superload

When a Michigan load becomes a superload

Routine dimensions

Routine dimensions

Length has no set routine maximum. Width is routinely permitted up to 15′-6″, and height is routinely permitted up to 16′.

Length has no set routine maximum. Width is routinely permitted up to 15′-6″, and height is routinely permitted up to 16′.

Gross weight limits

Gross weight limits

Typical routine gross weights: 5 axles up to 100,000 lbs.; 6 axles up to 125,000 lbs.; 7 axles up to 148,000 lbs.; 8 axles up to 150,000 lbs.

Typical routine gross weights: 5 axles up to 100,000 lbs.; 6 axles up to 125,000 lbs.; 7 axles up to 148,000 lbs.; 8 axles up to 150,000 lbs.

Axle weight limits

Axle weight limits

Routine axle weights are commonly 23,000 lbs. single, 46,000 lbs. tandem, 60,000 lbs. tridem, and 92,000 lbs. quad.

Routine axle weights are commonly 23,000 lbs. single, 46,000 lbs. tandem, 60,000 lbs. tridem, and 92,000 lbs. quad.

Loads exceeding Georgia routine permit dimensions or weights must be applied for as Super Loads.

Loads exceeding Georgia routine permit dimensions or weights must be applied for as Super Loads.

Michigan escort requirements

Michigan escort requirements

Length

Length

Over 75′ may require one escort or approved rear amber lights. Over 100′ requires one escort. Over 125′ requires two escorts.

Over 75′ may require one escort or approved rear amber lights. Over 100′ requires one escort. Over 125′ requires two escorts.

Width

Width

Over 12′ up to 14′-8″ may require a rear escort or amber light on interstate routes, and two escorts or one escort plus amber light on two-lane roads. Over 14′-8″ up to 16′ generally requires two escorts on two-lane roads and one escort on limited-access or interstate routes. Over 16′ is reviewed case by case.

Over 12′ up to 14′-8″ may require a rear escort or amber light on interstate routes, and two escorts or one escort plus amber light on two-lane roads. Over 14′-8″ up to 16′ generally requires two escorts on two-lane roads and one escort on limited-access or interstate routes. Over 16′ is reviewed case by case.

Height

Height

Loads over 15′-6″ require one escort with a height pole. Flashing amber lights used in Georgia require a current Georgia light decal.

Loads over 15′-6″ require one escort with a height pole. Flashing amber lights used in Georgia require a current Georgia light decal.

Signs, flags, lights, and Michigan load notes

Signs, flags, lights, and Michigan load notes

Signs and flags

Signs and flags

“Oversize Load” signs are required on all Georgia permit loads. Flags are required on all four corners and on oversize extremities.

“Oversize Load” signs are required on all Georgia permit loads. Flags are required on all four corners and on oversize extremities.

Compliance note

Compliance note

A current Georgia Light Sticker decal is required when using flashing amber beacon lights in Georgia.

A current Georgia Light Sticker decal is required when using flashing amber beacon lights in Georgia.

Miscellaneous load notes

Miscellaneous load notes

Poles, structural steel, and pipes may be legal up to but not over 75′. Blades over 12′ must be angled; blades up to 14′ wide may travel on the same vehicle when they belong to the equipment being hauled.

Poles, structural steel, and pipes may be legal up to but not over 75′. Blades over 12′ must be angled; blades up to 14′ wide may travel on the same vehicle when they belong to the equipment being hauled.

Need a Michigan Oversize Permit?

Need a Michigan Oversize Permit?

Atlantic Unity LLC helps carriers request Michigan oversize permits, overweight permits, superload permits, route support, escort coordination, and compliance guidance for permitted loads moving through Michigan.

Atlantic Unity LLC helps carriers request Michigan oversize permits, overweight permits, superload permits, route support, escort coordination, and compliance guidance for permitted loads moving through Michigan.

Request Permit

Request Permit

Call Atlantic Unity

Call Atlantic Unity