Drunken driving arrests drop in Ann Arbor over past 5 years, but no clear answer as to why

Drunken driving arrests are down in Ann Arbor, but police officials aren't sure why.  In the past five years, drunken driving arrests have fallen about 28 percent, a gradual decline each year that officials say could be tied to better awareness of the penalties or fewer officers on the streets.

In 2003, 132 drunken driving arrests were made in Ann Arbor, according to University of Michigan and city of Ann Arbor statistics. That number eventually dropped to 95 in 2008.  Read more:  http://www.mlive.com/news/ann-arbor/index.ssf/2009/05/drunken_driving_arrests_drop_i.html