Bill Geary of Quincy wrote to ask about backups around the Neponset River Bridge reconstruction. He’s not the only one wondering. Those stuck in recent weeks trying to get to Boston from the South Shore have fumed on Twitter, Craigslist’s “rants and raves” section, and blogs such as Neponset River Bridge Dig , which tracks the progress of what some locals dub “one of the biggest traffic headaches since Boston’s ‘Big Dig.’ ”
The bridge carries 61,000 to 71,000 weekday vehicles — for perspective, that’s about three times the volume on the Longfellow Bridge — on Route 3A between Quincy and Boston. On the Boston side, it meets Neponset Circle and feeds the Southeast Expressway, also known in that stretch as Interstate 93, US Route 1, and state Route 3.