The Longfellow Bridge that joins Boston and Cambridge has reopened. The number of car travel lanes has been permanently reduced from 4 to 3 as part of the renovation.
In “Cost to renovate Longfellow Bridge compared to its construction cost” (2013), I wrote that the project would be done in 2016 and cost $260 million, roughly 4X the original cost of $65 million (2013 dollars).
In “Longfellow Bridge repairs will now take about as long as the original construction” (2015) I gave an updated completion time.
The bridge is not quite finished, but it is open, and the cost to repair came in at roughly $300 million, about 4.6X the cost to build. See “Longfellow Bridge Reopens After $300 Million Reconstruction Project” (NECN).