(Portage) Two bridge construction projects will begin next week near Portage. Crews will reshape the existing median shoulders along I-39 and install guardrails along the interstate median between the Baraboo River and County Road O. A polymer over will also be applied on the I-39 structures over Hogan Road, north of Portage. The treatment will help the bridges be more resistant to damages caused by winter maintenance, which optimizes pavement life. Transportation officials say I-39 will remain open to traffic with shoulder and lane closures during median improvements. The work on the I-39 bridges over Hogan Road will be completed during overnight hours. Drivers are advised to slow down and be alert for crews and equipment near the travel lanes. The $2.2-million-dollar project will begin Monday (August 9th) and be scheduled for completion in mid-October, weather permitting.