Where are we on improving the #MBTA? @BruceMohl asks MBTA chair Joseph Aiello. “Still at the very beginning.”

“We were in as dark a hole as you can imagine.” Aiello defends the T’s plan as a “radical transformation,” esp on the Red Line, where the goal is to get to service every three mins by mid-2020s, almost doubling capacity.

He also said (as officials have before) that past estimates on repair backlog of $7.3b are probably low.