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Overview

The purpose of the I‐39/90 and US 12/18 (Beltline) Interchange project is to accommodate I‐39/90 traffic levels with a focus on safety issues that affect Interstate travel through the US 12/18 interchange and to ensure compatibility with the I‐39/90 Expansion Project, south of US 12/18 to the Illinois state line.

• I-39/90 and US 12/18 (Beltline) Interchange, preferred alternative
• Summary of planned improvements at the I-39/90 and US 12/18 (Beltline) interchange

A unique traffic condition exists along I-39/90 northbound, resulting in higher traffic volumes on the ramp from US 12/18 (Madison Beltline) as compared to the northbound Interstate in the core of the interchange. This video briefly summarizes this unique condition and the potential impact that design options have on safety through the interchange.

Public Hearing

A public hearing was held on December 13, 2018 at the Ho-Chunk Nation Teejop Hocira (Community Recreation Center). View the Public Hearing Notice.

View the exhibits and handout from the Beltline interchange public hearing:

• I-39/90 and US 12/18 (Beltline) Interchange, preferred alternative
  • Overview of interchange improvements
  • Core of I-39/90 northbound through Beltline interchange
  • Anticipated environmental and right of way impacts
  • Crash Analysis: Location 1-2 | Location 3-4 | Location 5-6
  • Alternative A and Alternative B dismissed
  • Interchange area map
• Construction schedule
• Presentation
• Hearing Packet
• I-39/90 improvements from County AB to US 12/18 interchange

ENVIRONMENTAL ASSESSMENT (EA)

An EA was produced for this project. The EA evaluated the purpose and need of the overall project, and the environmental impacts of a number of alternatives developed during the study.

EA signed on November 13, 2018.

• View the EA (17 MB) 
  • Note: this file does not include exhibits. To view exhibits, see the complete document below.
• EA (complete) (49 MB)

FINDING OF NO SIGNIFICANT IMPACT (FONSI)

FONSI signed May 2, 2019.

• View FONSI
  Note: this file does not include exhibits.

Date	Task
December 13, 2018	Public Hearing
January 11, 2019	Comment Period Ends
May 2019	Final Environmental Decision
2020	Begin construction in core of Beltline Interchange (minimal impacts to traffic anticipated).
2021	Complete construction of Beltline Interchange and 45-mile I-39/90 corridor to the Illinois state line.

For more information regarding the environmental documents, contact:

John Vesperman, P.E.	Jennifer Grimes
I-39/90 Project Chief	I-39/90 Project Environmental Coordinator
john.vesperman@dot.wi.gov	jennifer.grimes@dot.wi.gov