[simulate]

Since drivers pay the $6 toll only one direction, it will take $6.4B / (125,000 vehicles per day * $6 per car * 365.25 days per year) = 24 years to pay off the bridge with tolls alone.

[aggie]

With a projected lifespan of 150 years [1], that seems pretty reasonable.

[1] http://www.dot.ca.gov/dist4/eastspans/