Best Transportation Project: North Americas Longest Cable-Stayed Span Bridge
The John James Audubon Bridge is the only Mississippi River crossing between Natchez, Miss., and Baton Rouge, La. The 3,186-ft-long bridge has a main span of 1,583 ft.
Featuring 11-ft-wide travel lanes, an 8-ft-wide outer shoulder and a 2-ft-wide inner shoulder, the bridge's deck is supported by 136 cable stays, each anchored to one of the bridge's two 520-ft towers. Each tower is anchored by 42 drilled shafts that extend 180 ft into the riverbed.