What have been the Boston area’s biggest transit mistakes and missed opportunities?

There is so much going on transportation-wise in the Boston area at any given moment that it can be difficult to keep it all straight.

There are at least two major bridge projects underway or planned right now (and a big one just wrapped up). Federal and state forces are expanding the Green Line, one of the biggest infrastructure projects in the U.S. The T is getting new cars. Bus service is expanding or has recently expanded. The MBTA has lighted a candle for the CharlieCard. Bike-shares are everywhere. Etc.

But what more needs to be done? And what more could have been done or should have been done? That’s our latest open thread: The missed opportunities and mistakes as far as transportation goes in the Boston region.

We’ve explored the topic before, though mostly related to how the T ultimately unrolled. What else, though? Sound off in the comments section below.

• North Washington Street Bridge repairs in Boston to last five years [Curbed Boston]
• Boston’s old Northern Avenue bridge: Who should get priority when it reopens? [Curbed Boston]
• Commonwealth Avenue closure will run from July 26 to August 11 [Curbed Boston]
• Green Line extension groundbreaking signals monumental project on its way [Curbed Boston]
• 9 Boston transportation changes that should give commuters hope [Curbed Boston]
• Boston area’s late-night bus service extended to aid off-hour workers [Curbed Boston]
• Silver Line rolling into Chelsea in April as planned [Curbed Boston]
• All-electronic fare collection on the T: MBTA moving toward London model [Curbed Boston]
• Boston bike-shares: A guide to the rides in the city and its surrounding region [Curbed Boston]
• Boston infrastructure: 5 big missed opportunities [Curbed Boston]