MACKINAW CITY, Mackinac County, Mich., Sept. 24, 2026 — The Mackinac Bridge was fully closed to traffic Tuesday afternoon, September 22, after a serious two-vehicle rear-end crash in Mackinaw City, according to the Michigan State Police. Multiple people were hurt, including two with serious injuries.
The Michigan State Police said both vehicles were headed southbound on the bridge when one struck the back of the other. The bridge was shut down in both directions while crews worked the scene, with officials saying it would reopen once the investigation concluded.
Emergency crews responded to treat those injured in the crash. Two people suffered serious injuries, the agency said, though the extent of the other injuries has not been detailed.
The Mackinac Bridge Authority and other agencies assisted at the scene.
Authorities continue reviewing the collision. We wish those injured a swift and full recovery.
What Helps Prevent Rear-End Pile-Ups on Long Bridge Spans
Traffic engineers have found that rear-end crashes on bridges and other long, uninterrupted stretches of road often trace back to speed differences between vehicles rather than any single driver's mistake. When one car slows or stops unexpectedly and the driver behind doesn't have enough space to react, a chain reaction can follow, especially on a span with no shoulder to pull into and few places to exit.
Visibility plays a large role in how these crashes unfold. Fog, blowing snow, glare off open water, or even smoke from a distant source can cut sight distance sharply on elevated roadways exposed to wind and weather, giving drivers less time to see brake lights ahead and adjust. Bridges are particularly prone to sudden fog banks because of the temperature difference between the water below and the road surface, and that can turn a routine slowdown into a multi-vehicle crash before anyone has a chance to react.
Engineering fixes that have shown results elsewhere include variable speed limit signs that adjust in real time to weather and congestion, better lighting at bridge approaches, and sensors that warn drivers of slowed traffic ahead before they can see it themselves. According to the National Highway Traffic Safety Administration, 2,979 passenger-car occupants were killed in two-vehicle crashes involving a passenger car and a light truck in 2023, a reminder of how much vehicle mismatch can shape the outcome once a rear-end collision happens.
Frequently Asked Questions
How does fog or low visibility contribute to multi-vehicle crashes?
Reduced visibility shortens the distance a driver has to spot slowed or stopped traffic ahead. On open spans exposed to wind and water, fog or glare can appear suddenly, leaving little time to brake before a rear-end collision occurs.
Why does following distance matter so much in these crashes?
A longer following distance gives a driver more time to react if traffic ahead slows suddenly. Most rear-end crashes happen because the gap between vehicles wasn't large enough for the conditions, whether that's speed, weather, or heavy traffic.
Are secondary crashes common after an initial wreck?
Yes. Once a crash blocks lanes or slows traffic, following vehicles can strike each other or the stopped cars ahead, especially if visibility is poor or drivers don't see brake lights and flares in time.
What makes multi-vehicle crashes difficult to investigate?
Investigators have to determine the sequence of impacts, which vehicle struck which, and whether speed or visibility played a role, often using vehicle data, skid marks, and witness accounts gathered after the scene is cleared.
What to Do After a Rear-End Crash in Mackinac Bridge, MI
If you're involved in a rear-end crash, try to move to a safe area if the vehicle is drivable and it's safe to do so, and turn on hazard lights to warn other traffic. Check yourself and passengers for injuries, and call 911 even if injuries seem minor, since some, like whiplash or internal injuries, aren't obvious right away.
Getting checked by a medical provider afterward is worth doing even if you feel fine at the scene, especially after a jolt from behind. Exchange information with the other driver, note the responding agency and any report number, and take photos if you're able. On a span like the Mackinac Bridge, follow instructions from responding officers closely, since traffic control and safety on the bridge itself add extra complexity to any scene.
