• Maximum speed limit is 45 mph.
• No U-turns.
• No stopping on the Mackinac Bridge.
• In the event of a flat tire or motor failure, please remain in your vehicle. Bridge personnel on duty will investigate and assist.
• Use four-way flashers while vehicle is disabled.

Truck Regulations

• Travel in right lane – no passing.
• 500-foot spacing – no tailgating.
• Use four-way flashers.
• Maximum speed is 20 mph for vehicles exceeding 30 tons (60,000 lbs.).
• Rules Enforced from toll plaza to Jamet Street exit.
• Trucks with a gross load of over 40 tons must request escort prior to crossing.
• Maximum allowable vehicle weight is 72 tons.

Placarded Loads

• Transportation of flammable liquids, liquid gases, explosives and other placarded loads requires an escort by bridge personnel. Persons transporting these loads must call Bridge Services at 906-643-7600 for escort.

Oversized Vehicles

• Oversized vehicles must call 24 hours in advance to arrange a bridge escort.

Other restrictions may be in effect due to weather conditions or construction projects.
Please tune to 530 or 1610 am radio while in the Straits area.