I probably won't do a lot of updating for this spot, but I wanted to share it anyways. Without going into too much detail, the amount of trucks I see going through here is staggering. Unfortunately it's really bad because the volume of traffic is also really high, this being one of the worst choke points in a region known for choke points. I've seen traffic backed up at every hour of the day (yes even at night because that's prime time for roadwork around here). These shots were taken on a Saturday afternoon, and as you will be able to tell even that isn't a good time because there's too much traffic. Anyways, first couple pictures are to set the scene:
On the far left is Loisdale Rd, next to that is northbound I-95 about a mile south of the "mixing bowl" aka the intersection of I-95, 395, and 495. Next to the northbound lanes are the interchangeable Express lanes, then southbound 95, then hidden behind the treeline on the far right is Backlick Rd. The pedestrian bridge spans all of these roads. Unfortunately every part that crosses a roadway is covered by chainlink fence. I tried to work around it but was unsuccessful (which is why I only went back twice since these pictures were taken last December).

The footbridge:

Green Columbia for S. Coraluzzo (those of you who see Coraluzzo on the regular know this is semi-rare, the majority of their rigs are painted burgundy).

Older Mack for Kenan Advantage (this spot is great for getting tankers coming/going to/from the fuel depot about a mile down the road):

This next heavy haul 379 was shot through the chain link fence, headed south down 95. I switched sides because the northbound side wasn't getting any action.

Cool "whales" trailer for National Van Lines that is getting blocked by traffic. This is another major downside to this spot, with an estimated 250k cars and trucks going through the interchange daily about a mile up the road the odds of having traffic block your shot is really high.

VNL670 for Atlas agent Devries:

T800 for Owen Trucking out of Stafford, VA:

Nice 379 for Kenan Advantage:

Old GMC for National agent J. Barber Moving & Storage:

Older Volvo blocking a clean FL Classic:

Interesting shot of an old Autocar road painter setting up to do some painting on Backlick Rd that I caught while I was on the footbridge:
