Skip to Content
Streetsblog California home
Streetsblog California home
Log In
Streetsblog USA

Federal Court: Wisconsin Uses Bogus Traffic Data to Justify Highways

State departments of transportation all over the country use specious traffic projections to justify hugely expensive road widening projects. That's how you end up with the graph on the right -- showing how DOTs continued to forecast traffic growth year after year, even as driving stagnated.

This chart shows aggregate travel projections for the nation's state and regional transportation agencies. Graph: SSTI
Aggregate traffic projections from the nation's state and regional transportation agencies have become increasingly divorced from reality. Graph: SSTI
false

Wisconsin DOT is perhaps the most notorious manipulator of traffic forecasts. Fortunately, Wisconsin also has a strong network of organizations holding the DOT's feet to the fire and dragging it to court if need be.

Today, 1,000 Friends of Wisconsin Executive Director Steve Hiniker shares news of a major legal victory. A federal court sided with the organization in a suit against WisDOT that challenged the traffic data used to justify the $146 million widening of Highway 23:

According to the ruling, the Wisconsin DOT failed to justify the amount of traffic it projected as likely to use the road in the future. The Court ruled that the project is ineligible for federal funding until documented accurate traffic forecasts can be made that justify expanding the highway. The state can now either go back to the drawing board and do verifiable forecasting or scrap the expansion plans. The ruling does not stop the state from building the project using only state funds.

“We encourage the DOT to immediately make safety improvements along Highway 23 that could always have been done without expanding the highway to 4 lanes,” added Hiniker.

This case could have dramatic ramifications for other highway building plans in the state. Critics of DOT building plans have questioned a number of projects based on faulty traffic projections – including the proposed almost billion dollar expansion of the I-94 corridor near Miller Park in Milwaukee.

“We call on the legislature to stop funding any road expansion project that has not already begun construction until updated, accurate and verifiable traffic forecasts can be made. The state cannot afford to spend billions of dollars on highway projects that are not justified by accurate data,” concluded Hiniker.

Elsewhere on the Network today: Bike PGH announces that Pittsburgh's bike-share system will launch on Sunday. Urban Cincy reports that Cincinnati's population has risen for the third year in a row, reversing a five-decade trend of decline. And Urban Indy questions the local art museum's ban on bikes.

Stay in touch

Sign up for our free newsletter

More from Streetsblog California

The Week in Short Video

Have you watched 'em all? Bikes on buses, massive freeway harms, not-quite-a-peace-prize, and a year-end appeal

December 12, 2025

Friday’s Headlines

Amidst the sad news of the failures of Vision Zero, there's hope in some innovative and progressive local efforts.

December 12, 2025

CA Approves $1.1 Billion in Transportation Grants, Including Zero-Emission Transit

“We are pleased to partner with Caltrans to enhance the economic competitiveness of our state and make commuting more affordable, while protecting our environment,” said California Transportation Commission Chair Darnell Grisby.

December 11, 2025

Thursday’s Headlines

State invests in zero-emission transit, CAHSRA fights for federal funds, LA sinks into unintentional self-parody, and more...

December 11, 2025

Eyes on the Street: G Line Busway Bridge Over Van Nuys Blvd

Metro G Line upgrades are expected to be complete in 2027.

December 10, 2025

Hooray! Direct Payment Finally Comes to Bay Area Transit

Advocates and officials celebrate as the Bay Area finally joins New York, London, Toronto, and other cities with a modernized fare-payment system.

December 10, 2025
See all posts