I-39/90 (Illinois state line - US 12/18) Project - Need/purpose
Why is this project needed?
Roadway traffic and capacity
Today, the roadway is experiencing traffic slowdowns and backups,
particularly during peak travel times. In 2011, I-39/90 carried an
average of more than 50,000
vehicles per day. During summer 2011, traffic volumes along the
corridor exceeded 70,000 vehicles per day. These volumes are predicted to increase to between
80,000 and 100,000 vehicles per day by the year 2030.
I-39/90 is also a federal truck route, with about 35 percent of its
total traffic volume consisting of heavy trucks. Thatís an increase
from 30 percent truck traffic in 2007.
Without corrective action, future travelers will experience deteriorating
driving conditions within the corridor, including significantly
reduced speeds and worsening congestion. Crashes and other traffic
events will routinely result in extensive backups and excessive delays.
The number of traffic related crashes along I-39/90 between
the Illinois state line and Madison have increased as travel
volumes have grown. This trend is expected to continue if no improvements are made.
There was an average of 608 crashes per year along this stretch of
Interstate for the 6-year period of 2000 to 2005. Of these, 227
resulted in injuries and five in fatalities.
This segment of I-39/90 was designed and constructed in the early
1960s. Since that time, design standards for interchanges and
roadways have been updated to allow facilities such as the Interstate
to maintain their functionality and operate more efficiently and
Access to tourism
Tourism is vital to Wisconsinís economy. The tourism industry
generates billions of dollars in state and local revenues, and
provides several hundred thousand jobs. I-39/90 is one of the largest
gateways for both in-state and out-of-state residents to get to the
many tourism and recreational destinations in the state, including the
Wisconsin Dells and points further north.
Project benefits/proposed improvements
The outcome of the study is a recommended plan that will improve safety, ease congestion and
modernize this important transportation corridor.
The proposed improvements will:
Reconstruct and expand the existing 4-lane divided Interstate to create a 6-lane
Reconstruct and expand the Interstate to eight (8) lanes from
WIS 11 (Avalon Rd.) to WIS 26 interchange in Janesville.
Reconstruct the 11 interchanges within the corridor to update
configurations including ramps to current design standards.
Update slope grading and clear zone area throughout the corridor to current design standards.
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Last modified: April 15, 2013