All oversize loads entering the Village of Sister Bay, located in Door County, Wisconsin, must conform to the requirements set by the Wisconsin Department of Transportation.

In general, any vehicle over 12 feet in width, 14 feet in height, and within the Class 3 weight category (over 80,000 lbs but not exceeding 90,000 lbs for divisible loads with a permit, and up to 120,000 lbs for non-divisible loads with a superload permit) should obtain an oversize load permit from the Door County Highway Department in coordination with the Sister Bay Public Works Department.

Sister Bay, being a popular tourist destination on the Door Peninsula, requires special consideration for oversize loads to avoid disrupting the local infrastructure and traffic, particularly during peak travel seasons.

In Sister Bay, escort vehicles are required for oversize loads exceeding 14 feet in width or 15 feet in height. Escort vehicles must be equipped with appropriate warning lights and signage as per Wisconsin Department of Transportation regulations.

For loads that are particularly large or complex, a police escort may be required. Arrangements for police escorts should be made through the Door County Sheriff's Office at least 48 hours in advance. Fees for police escorts vary based on the duration of the escort and the number of officers required.

To apply for an oversize load permit in Sister Bay, carriers should contact the Door County Highway Department. Applications can be submitted online through the Wisconsin Department of Transportation's permit portal or by contacting the Door County Highway Department directly.

Applicants will need to provide detailed information about the load, including its dimensions, weight, and proposed route through Sister Bay. Documentation of insurance and a valid USDOT number may also be required.

Sister Bay has time-of-day restrictions for oversize loads to minimize disruptions during peak tourist season (June 1 through September 15). Oversize loads are generally restricted from traveling during weekday rush hours (7-9 am and 4-6 pm) and are not permitted on certain holidays.

Seasonal restrictions may also apply due to weather conditions, particularly during winter months when roads may be closed or restricted due to snow and ice.

Certain routes within Sister Bay are restricted for oversize loads, including those through historic districts or areas with low clearance bridges. Carriers should work with local authorities to identify approved routes.

The base permit fee for an oversize load in Sister Bay is $40, with additional fees based on the size and weight of the load. For superloads (loads exceeding standard permit dimensions), fees can range from $100 to $500 or more, depending on the complexity of the move and the route.

Additional charges may apply for escort services, whether provided by the carrier or through a contracted service. Fees for police escorts are billed separately by the Door County Sheriff's Office.