From the National Association of Mutual Insurance Companies: "Omnibus Trend, Growth of Municipal Accident Response Fees." April 2006

"Across the country and in most Midwestern states, including Illinois, Indiaina, Iowa, Michigan, Missouri, Ohio and Wisconsin, insurance companies are facing the growing phenomenon of cash-straplped municipalities billing insurance companies for police or fire responses to auto accidents, no matter how routine or minor...Providing coverage for police or fire responses to auto accidents would most likely result in rate increases passed along to consumers." 

Municipal Accident Response Fees: NAMIC White Paper