A turnpike is a type of road where travelers must pay a toll to use it. These tolls are used to help maintain and improve the road.
Lancaster Turnpike from J LO K.S.B.
It depends on you definition of turnpike. If any limited access tollway is a turnpike, then the section of I-75 from Mackinaw City to St. Ignace (The Mackinac Bridge) is located within the state. Also, several briges and tunnels connecting Michigan to Ontario, Canada are tollways. If your definition excludes toll bridges and tunnels, then I-80/I-90 in Indiana (the Indiana Toll Road) is probably the closest - it is less than a mile from the Michigan border in Indiana for a good portion of its length. If you require the road to be named a turnpike, I-90 in Ohio is a few miles from the Michigan border from Indian to Toledo and is formally named the Ohio Turnpike. I do not believe there are turnpikes in Wisconsin, the other state that borders Michigan.
lancaster turnpike
Turnpike is a toll road
Cimarron Turnpike was created in 1975.
Turnpike House was created in 1805.
Delaware Turnpike was created in 1963.
Massachusetts Turnpike was created in 1958.
Berlin Turnpike was created in 1909.
Everett Turnpike was created in 1955.
Connecticut Turnpike was created in 1958.