A successful example of this is the I-670 cap bridge in Columbus, OH. The bridge is lined with buildings so it’s hard to tell you’re even on a bridge. It has t

A successful example of this is the I-670 cap bridge in Columbus, OH. The bridge is lined with buildings so it’s hard to tell you’re even on a bridge. It has the advantage of being over a sunken highway, so there’s no grade change to deal with. https://www.google.com/search?q=the+cap+at+union+station&lr=&hl=en&prmd=minv&source=lnms&tbm=isch&sa=X&ved=0ahUKEwie1aul0NTbAhWszlkKHe1LBj4Q_AUIEigC&biw=1024&bih=653#imgrc=DGkhBEXptBzdmM https://www.google.com/search?q=the+cap+at+union+station&lr=...: