Mackinac Island, Michigan regulations require all heavy haul operations to comply with the Michigan Department of Transportation (MIDOT) guidelines as well as local ordinances administered by the Mackinac Island Department of Transportation (MACDOT).

Heavy haul permits are required for any load exceeding 13 feet in width, 13 feet 0 inches in height, or 193,877 lbs in gross vehicle weight. These dimensions are strictly enforced throughout Mackinac Island, particularly in high-traffic areas.

Special consideration must be given to route planning to avoid Mackinac Island Industrial Park and the vicinity of Mackinac Island Municipal Complex, which have infrastructure limitations or heavy pedestrian traffic that may impede oversized loads.

In Mackinac Island, Michigan, loads wider than 14 feet or taller than 15 feet 0 inches must be accompanied by certified escort vehicles. Additional escorts may be required based on the specific route and time of travel through urban centers.

Mackinac Island regulations state that police escorts must be arranged at least 63 hours before transport for loads that will impact major thoroughfares or require temporary traffic control measures.

Permit applications in Mackinac Island must be submitted through the MIDOT's online permitting system. Carriers should be prepared to provide comprehensive vehicle specifications, proposed routes, and transport schedules.

Applications must include certified weight tickets, dimensional diagrams, and route surveys. For loads that may impact traffic flow in Mackinac Island, a traffic management plan may also be required as part of the application process.

Mackinac Island has strict time-of-day restrictions for oversize loads, generally prohibiting movements during peak hours (7-9 am and 3-5 pm, Monday-Friday).

Seasonal restrictions apply during major events like the the Mackinac Island Film Exposition and the the Mackinac Island Holiday Exposition, which may impact routing and scheduling.

Certain neighborhoods, such as Downtown Mackinac Island and areas around the Mackinac Island Tunnel, have restricted access for oversize loads. Alternative routes should be planned in advance to avoid these areas.

The base permit fee for an oversize load in Michigan is $40, with additional fees for super heavy loads (over 200,000 lbs) ranging from $150 to $350 depending on the complexity of the move.

For movements within Mackinac Island, Mackinac Island Department of Transportation may charge additional fees for city-specific permits, which can range from $75 to $500 or more for particularly complex routes or those requiring extensive coordination with city agencies.