Recent metro bridges

Concrete box girder; 1,216 feet long; 10 lanes; total cost $393 million, including $234 million for construction; opened September 2008 after 11 months of construction.

Steel tied-arch; 1,575 feet long; four lanes; total cost $104 million, including $70 million for construction; to open in October after 33 months of construction.

Arch and steel beam; 1,938 feet long; four lanes; construction cost $120 million; to open spring 2014 after 40 months of construction.

Concrete box girder/cable-stayed; 5,100 feet long; four lanes; total cost $580 million to $676 million, including $280 million to $310 million for construction; projected to open 2017 after 36 months of construction.