Re: Innovation Dist. / South Boston Seaport
The transitway is going to need a new floor sooner rather then later, its already super bumpy and coming apart in places. When they do that it wouldn't cost a drastic amount more to sink some rails into the concrete. That, and raising the return feed on the overhead (so the trolley pantographs dont short out) is all you would need to do to have trolleys do a loop from South Station to SLW. The busses could still go beyond that as they do now. The only real issue is that the trolleys would be stuck crawling behind the buses, unless they install some guidance system for them (which they should have done from the start). When the type 9 order comes online and the type 7s get back from their rehab program there may be a very slight surplus, perhaps enough to be able to send 4 or so trolleys to do a seaport shuttle.
The B St I-93 tunnel is on the small disjointed section of B Street in front of the convention center. Google maps shows it pretty well.
As for the article, this is what I was just arguing earlier about having only a limited arteries to get drivers out of the seaport. The Northern Ave bridge should have remained open to traffic, and more N-S streets should have been pulled through from southie to encourage the flow to go both N-S and E-W. If its a huge problem they could probably open the truck road to general traffic, which despite being out of the way would probably be faster then fighting to get through the traffic on the greenway.
Regarding the seaport past the pavillion being dead, it is. However, Harpoon is a bit of a niche, and I regard everything past the pavilion to still be very much "working waterfront". I'm sure that area will eventually get some life to it just from spill over, but not until the seaport proper is fully built out. I think Harpoon wanted the beer hall to have that industrial dynamic anyway, it is more authentic.