But perhaps no stretch of highway was more ambitious than Florida's Overseas Highway ... the highway that connects the Keys ...

Leapfrogging from one key to the next over 42 bridges, the Overseas Highway is an engineering marvel with a railroad past ...

The Overseas Highway through the Florida ... Keys that are so close together it's hard to detect their boundaries, the route opens up to cross a wide swath of water. The famous Seven Mile Bridge ...

Case in point: A Monday afternoon accident on the Seven Mile Bridge — the longest and most impressive modern span in the Florida Keys — snarled traffic for hours in early March. Fortunately ...