The Navy Pier flyover on the Lakefront path, which began construction in 2014, is now partially open.
Unfortunately, it’s not the part most needed – the part over the Chicago River. That isn’t planned for completion until 2020.
https://chicago.curbed.com/2018/12/20/18150366/navy-pier-flyover-opens-phase-one?fbclid=IwAR07PKBKZE6XcQOvdVXumzit93X8HekI9F6xJzEO-gsDbBzGeOjDC0UeXDE