DETROIT — Like most Americans, the drivers of Detroit are required to carry auto insurance whenever they get behind the wheel, but many law-abiding residents can’t afford the Motor City’s highest-in-the-nation auto premiums, which top $5,000 a year in some neighborhoods.

So fully half of Detroit drivers do what’s known locally as “driving dirty” — taking to the streets without any coverage. It’s practically a tradition here.

Now Mayor Mike Duggan is trying to do something about the high insurance costs based on concerns that they are deterring new residents and investment from coming to Detroit as it rebuilds after emerging from bankruptcy last year.

The chief reason for the high rates: Michigan is the only state that requires auto insurance policies to come with unlimited lifetime personal-injury protection, meaning that people who are hurt in car crashes get 100 percent of their medical expenses covered, sometimes for years or even decades. The protection applies regardless of who was at fault.

The law also allows care providers to charge much more for treatment of auto injuries.


“Every doctor in every hospital in this state understands … that if you schedule an MRI for a rehab case for somebody who fell off a ladder and has Blue Cross, you get paid a certain amount,” Duggan said. “If that person got hurt in a car accident, you get reimbursed triple.”

The mayor wants to bring down insurance premiums by capping medical expenses tied to motorists’ policies.

When the Michigan insurance law was adopted in 1972, the intent was to save money by reducing lawsuits resulting from crashes. But rising medical costs have steadily pushed costs up.

Medical expenses now make up about 30 percent of total insurance premiums, said Nicole Bradshaw, a research associate at the Citizens Research Council of Michigan and author of a 2013 report on medical costs associated with so-called no-fault auto insurance.

Detroit’s insurance rates are higher than those in the suburbs or in rural Michigan because urban areas tend to have more claims, and those claims are often more expensive.

All of the nation’s 25 priciest insurance zip codes are in Detroit, according to an industry ranking. Some motorists pay more for auto insurance than for rent. And many people who wouldn’t think of going without health insurance or life insurance regularly take the risk when they drive.

“I just do what I have to do,” said Jean Ford, 56, who let her $285 per month policy lapse in May because it took too much of the $1,400 per month she gets in disability and Social Security. “I get my daughter to drive me to the grocery and to doctor appointments. But when she can’t, I have to drive myself.”