1900s	1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s

1971
I-69 Coldwater Rest Area judged best in the nation by U.S. DOT

1973
Michigan Department of State Highways becomes the Michigan Department of Highways and Transportation - consolidating all transportation programs into a single agency; State Aeronautics Commission joins department

1974
First paved bicycle path along M-99

1975
The 25 millionth vehicle crosses the Mackinac Bridge

1977
US-31 in Oceana County wins national "most beautiful highway " contest sponsored by U.S. DOT

1977
MDOT begins a program of recycling - converting old highways to new ones by reusing the materials (asphalt recycling started in 1977, concrete in 1983)

1978
Michigan Department of Highways and Transportation becomes the Michigan Department of Transportation

1977-80
MDOT develops nation's largest vanpool program for public employees including120 vans and 1,350 people