WisDOT has been working on various safety upgrades along the Beltline Highway around the south and west sides of Madison.
Today, a major piece of that work was completed. The last portion of work, allowing EBD traffic on the Beltline to exit to NBD Park St (US-151) was opened today.
Capital Times: Park Street interchange work on Beltline finished
http://host.madison.com/ct/news/local/article_284b8dfe-f727-11df-8fb6-001cc4c03286.html
More info on ongoing work on the Madison Beltline:
http://www.dot.wisconsin.gov/projects/beltlineimprovements/index.htm