In order to improve evacuation routes out of New Orleans in the event of another major disaster such as Hurricane Katrina, the Louisiana Department of Transportation is planning to construct an additional bridge across the Mississippi River. Two alternatives are being considered: a suspension bridge and cantilever bridge. The department uses an interest rate of 8% and plans for 50-year life for either bridge. Which design has the better PW? Show your calculations in your working document. See picture for values.

In order to improve evacuation routes out of New Orleans in the event of another major disaster such as Hurricane Katrina, the Louisiana Department of Transportation is planning to construct an additional bridge across the Mississippi River. Two alternatives are being considered: a suspension bridge and cantilever bridge. The department uses an interest rate of 8% and plans for 50 -year life for either bridge. Which design has the better PW? Show your calculations in your working document