Bridges first, road later...

[thenetwork]

In Northeast Ohio, I-480's two tallest bridges (Valley View Bridge over the Cuyahoga River and the bridge near the Airport over the Rocky River were both built well before the roadways on either side of the bridge existed.

[Big John]

In Pittsburgh, the Fort Duquesne bridge was dangling on one side with no further spans nor abutments, thus it was called The Bridge to Nowhere.

[CtrlAltDel]

I love that road hidden in the roundabout.

That would be the footpath as they call it over there.

Ah. I thought is was a road for local traffic.

[PurdueBill]

The bridges built for the "new" US 231 (now US 231 and 52) near Lafayette, Indiana (including the one over the Wabash River and 2 rail overpasses of the future highway) were disconnected from anything for 5 years+ until the road was built and finally opened in summer 2001.  For several years driving down South River Road, you could see the bridges across a field going nowhere.