Percentage of traffic incidents cleared in less than 2 hours

91.1%

(Dec 2011)

92.9%

(Dec 2012)

Passenger air service in and out of Michigan in millions of passengers

37.3

(2011)

36.8

(2012)

Percentage change in passenger rail ridership 

7.8%

(2011)

-1.8%

(2012)

Percentage change in bus ridership

2.3%

(2011)

-1.5%

(2012)

Percentage of structurally deficient bridges

11.76%

(2011)

12.31%

(2012)

Percentage of roads in good or fair condition in the paved federal aid system

64.9%

(2011)

66.4%

(2012)

Number of dam failures

2

(2011)

3

(2012)

Raw sewage discharge in billions of gallons

2.45

(2010)

7.90

(2011)

5.74

(2010)

5.74

(2011)

52.7

(2009)

60.4

(2010)

67%

(2010)

Percentage of U.S. trucking trade traffic through Michigan international borders

44.9%

(2011)

45.3%

(2012)

6,595

(2011)

6,612

(2012)

106

(2011)

72

(2012)

72%

(FY 2011)

76%

(FY 2012)

- On time or ahead of schedule

99.6%

(2010)

99.7%

(2011)

77.8%

(2010)

85.0%

(2011)