It’s no surprise that cell phone use is a major cause of distracted driving crashes. A new study details groups in Michigan most likely to use handheld phones while driving: drivers under 29, women, non-whites and truck, SUV and van drivers. Study by MSU engineering researchers analyzed data based on roadside observations of 179,779 vehicles at 200 locations in the 35 counties with the most crash-related deaths, including St. Joseph, Marquette, Wexford, Montcalm, Lenawee, Hillsdale, Ionia, Ottawa, Livingston, Kent, Grand Traverse, Branch and Ingham counties. The lead researcher and the Iron County sheriff discuss By Eric Freedman. STURGIS, THREE RIVERS, MARQUETTE, CADILLAC, GREENVILLE, IONIA, HILLSDALE, FOWLERVILLE, GRAND RAPIDS BUSINESS, TRAVERSE CITY, HOLLAND, LANSING CITY PULSE, COLDWATER, BAY MILLS, SAULT STE. MARIE AND ALL POINTS.