Washington Avenue Bridge to receive $56 million re-decking

From Finance and Commerce Washington Avenue Bridge to receive $56 million re-decking to prepare it for Central Corridor LRT.
A major question remains unanswered. Why is it being kept open to traffic while construction is underway? Construction would be shorter, safer, and probably cheaper if the whole thing were closed. No traffic catastrophe would ensue, as the unexpected closure of the I-35W bridge and the planned closure of Mn36 showed, and it would be a good test of whether it could be permanently shut to auto traffic after Central Corridor opens on Washington Mall.
At least they are designing for 3 car trains, which the rest of the corridor seems not to be, lest the cost effectiveness index somehow slip.