Skip to Content
Streetsblog USA home
Streetsblog USA home
Log In
Highway Expansion

The Illiana Expressway Will Eat Itself

If you asked me to paint a picture of a highway where no highway should exist, this is the picture I would paint. Image: ## Brinckerhoff##
The Illiana Expressway fails on all measures -- expected revenue, projected traffic -- when looked at realistically. Unfortunately, Illinois and Indiana don't look at it that way. Image: ## Brinckerhoff##
If you asked me to paint a picture of a highway where no highway should exist, this is the picture I would paint. Image: ## Brinckerhoff##

A recent report by U.S. PIRG and the Frontier Group, “Highway Boondoggles: Wasted Money and America’s Transportation Future,” examines 11 of the most wasteful, least justifiable road projects underway in America right now. This is the final installment in our series profiling the various bad decisions that funnel so much money to infrastructure that does no good. 

Illinois and Indiana are proposing to build a new highway across the far southern extent of the Chicago metropolitan area at a cost of more than $1 billion and perhaps as much as $3 billion. Intended to divert truck traffic from Interstate 80, the tolls charged to finance the highway could instead discourage trucks from using the roadway.

The proposed Illiana Expressway would extend from I-55 in Wilmington, Illinois, to I-65 in Hebron, Indiana, at the southernmost reach of the Chicago metropolitan area, traversing a largely rural and thinly populated area.

The wisdom of the project has been questioned by staff of the region’s metropolitan planning organization, the Chicago Metropolitan Agency for Planning (CMAP), which said the project “expose[s] the State of Illinois to extensive financial risk,” even as it offered “unsubstantiated economic development potential” and “negligible impacts on regional transportation performance.”

Further, the staff criticized the planning process for significantly underestimating potential costs — by at least 30 percent and possibly as much as 400 percent, compared to similar highway projects around the country. CMAP staff projections also show an economic impact only one-fifth as large in 2040 as that projected by the highway’s planners.

Despite objections from Chicago Mayor Rahm Emanuel and Cook County Board President Toni Preckwinkle and the CMAP board’s resounding rejection of the tollway in a 10 to 4 vote, the Illinois Department of Transportation (IDOT) is proceeding with the tollway on the basis of a vote of approval by CMAP’s policy committee. In October, the CMAP board will consider a regional comprehensive plan that includes the Illiana. Environmental groups have brought a lawsuit challenging IDOT’s continued development of the tollway, alleging that the committee vote violated the required approval process laid out in Illinois law.

Cost estimates for the highway range between $1.3 billion and $2.8 billion if related work on connecting roads is included. Illinois taxpayers are already on the hook for $250 million of that cost, and Indianans will pay an additional $80 million to $110 million, even though the road is set to be built and operated by a private company that will charge tolls and profit from the proceeds.

Those cost numbers are just starting points. To make the project attractive for potential private-sector partners, Illinois taxpayers would have to kick in between $440 million and $1.1 billion in subsidies, and Indiana taxpayers will need to contribute additional amounts. According to CMAP staff, too few details of a proposed public-private partnership are available to make a more precise estimate of the public contribution, but the lower the toll rates will be, the more public support will be needed. This is problematic because higher toll rates will reduce actual use of the road — and therefore reduce the road’s potential benefit to the transportation system.

Traffic projections work their magic yet again. Image: U.S. PIRG and Frontier Group
Traffic projections work their magic yet again. Image: U.S. PIRG and Frontier Group
Traffic projections work their magic yet again. Image: U.S. PIRG and Frontier Group

It is unclear how much demand there actually is from drivers for the new route. The financing of the road is premised on strong and growing toll proceeds, but many drivers -- especially truck drivers -- avoid toll roads, especially when tolls are high and there are toll-free alternatives. The larger the truck, the more likely it will go elsewhere. At even the lowest level of toll considered by the proposal, more than half the tractor-trailer trucks that would use the road if it were free are expected to avoid it; at the highest considered toll, more than 80 percent will use other roads instead.

Further undermining the arguments for the road’s utility are planners’ traffic projections for the 18-county region that is designated as being affected by the Illiana project. The data show that from 2001 to 2010, the number of vehicle-miles traveled (VMT) in the region grew by an average rate of 0.42 percent a year.

But official IDOT projections still anticipate rates of driving increase from the Driving Boom era. IDOT projects that from 2010 to 2040, VMT would grow more than twice as fast as the last decade, at an annual rate of 0.91 percent. So far, since 2010, the region’s VMT has actually dropped by an average rate of 0.49 percent per year.

Phineas Baxandall, senior policy analyst at U.S. PIRG, and Jeff Inglis, policy analyst at the Frontier Group, are co-authors of the report, “Highway Boondoggles: Wasted Money and America’s Transportation Future.”

Stay in touch

Sign up for our free newsletter

More from Streetsblog USA

Friday’s Headlines Take Me to the River

Politico reports that the Biden administration is investing $2.5 billion in updating aging Mississippi River locks and dams like this one in Iowa. Transporting freight by barge produces less emissions than trucks or even rail.

July 12, 2024

Friday Video: Take a Spin on Boston’s Electric Cargo Bike Share

Can't afford a $7,000 Urban Arrow cargo e-bike ? In Boston, you can now rent one for just a few bucks.

July 12, 2024

Talking Headways Podcast: Electrify the Rails

Adrianna Rizzo of Californians for Electric Rail on California's looming lobbyist-fueled hydrogen train mistake: "We’re locking in low service for potentially decades."

July 11, 2024

Thursday’s Headlines Drive Less

Seems obvious that the more people drive, the more likely they are to die in a crash or kill someone else, but traditional thinking on traffic safety doesn't always follow that logic, according to Planetizen.

July 11, 2024
See all posts