Flex Lane on US 12 (Madison Beltline)

Whitney Way to Interstate 39/90, Madison - Dane County


  • March 2021 – Flex Lane construction began
  • December 2021 – Initial Flex Lane construction completion
  • Spring/summer 2022 – Eastbound Beltline construction near Todd Drive
  • Summer 2022 – Anticipated Flex Lane opening

Overview of traffic impacts

  • Daily single lane closures from 9 a.m. to 2 p.m. Monday through Thursday and 9 a.m. to 3 p.m. Sundays.
    • ​​Plan ahead for delays and allow extra time to reach your destination.
  • Off-peak ramp closures at interchanges between I-39/90 and Whitney Way.
  • Nightly lane closures from 6:30 p.m. to 6 a.m. Monday through Friday.

Weekly Construction Update

NOTE: The following lane restrictions and ramp closures are weather dependent and subject to change.

View the weekly construction update – December 3, 2021. PDF

*For weekly project updates, please email Consultant Project Leader Trenton Diehl, Trenton.Diehl@strand.com, and mention your interest to sign up for project updates.

Lane closures

  • Nightly lane closures on the westbound and eastbound Beltline between Agriculture Drive and Seminole Highway.
    • 6:30 p.m. to 6 a.m. weeknights
    • Be alert for slow downs in this area.
    • Watch for crews and equipment near the travel lanes.

Ramp closures – weather-permitting and subject to change

View the updated list of closures. Alternate routes are required during these timeframes.