The year 2006 is being celebrated as the "Year of the
Interstate" to commemorate the 50th anniversary of the
federal initiative that authorized construction of Interstate
highways. Here are a few key facts about Wisconsin's and the
nation's Interstate system:
On June 29, 1956, President Eisenhower signed the Federal Aid
Highway Act that authorized construction of a 41,000-mile
"National System of Interstate and Defense Highways"
to be completed within 15 years.
About 75% of Wisconsin's Interstate system was built in the
decade between 1959 and 1969.
Today's U.S. Interstate system covers some 46,775 miles and
represents a federal investment of some $120 billion.
Wisconsin has some 743 miles of Interstate that cost about
$1.5 billion (federal funds covered about $1.3 billion) to
While accounting for less than 1% of the state's 113,700 miles
of total roadway, Wisconsin's Interstate highways carry almost
18% of the state's vehicle miles each year and are among the
safest roads to travel.
In 2005, nearly 40% of Wisconsin's industrial parks were
located within five miles of an Interstate.
Wisconsin's longest Interstate highway segment - I-94 from
Hudson to Kenosha - covers some 334 miles.
Major Interstate routes are designated by one or two-digit
routes carry even numbers - north/south routes carry odd
Wisconsin has long served as a transportation leader:
First state to implement a system of numbered state
Among the first states to complete its rural Interstate
Nationally recognized for transportation policies that
encourage public input and minimize environmental impacts.