I stumbled upon this blog while looking up demolished train stations, and what they came to be (another very good blog entry on this website). However, the "Highways to Nowhere: The 7 Most Ridiculous New Roads Being Built in America" entry is extremely interesting.
I have known about various "roads to nowhere" projects, especially the highway to nowhere in New Mexico, and the bridge to nowhere in Alaska; however, I did not realize how many of these projects are still occurring, and are being proposed.
(project example from blog)
"Intercounty Connector — Prince Georges and Montgomery counties, Maryland
Former governor Parris Glendening’s assessment that this highway project would be an environmental disaster for the state didn’t prevent the Bush administration from later fast-tracking it.