University of Michigan graduate students Nicholas Grisham, Terra Reed, and Kevin Shelton found that the 2012 reductions in DDOT bus service affected almost all routes whether it was a reduction of hours, days, or the entire route. They also found that transit dependency was spread out across the city. They developed a Transit Dependency Index (TDI) based on Census data of: vehicle ownership, elderly population, youth population, and median household income.
Their question was whether bus reductions disproportionately affected transit dependent residents more than others. The answer was yes, but the impact also reached across the city.
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