The state is putting almost $13 billion into the improvement plan which will span over five years.
"We have to invest in our transportation system," said Quinn at a news conference Thursday. "It's important to get wherever we have to go - from work to home, to school, to shop, to vacations, whatever the case might be."
The project includes bridge rehabilitation, interchange reconstruction, and lighting.
"Illinois has to have a good system of roads and bridges," said Quinn.
The governor said the construction plan will create 167,000 jobs over the next few years.