Grimm was also filming last night.

The area around Union Station and the Post Office was lined with No Parking signs, and trailers and equipment storage were spread about.  Night filming, apparently, as was indicated by the light props that they've used before in the Pearl, to film night scenes around Adalind's condo.

Incidentally, right around the corner of this spot, is where the Welcome to Portland sign is located (not real) in the episode Cat and Mouse, where Ian gets off the bus.  In that scene by the way, the cabs are driving the wrong way on a one-way path, and that's Union Station (rail) where he's getting off from the bus.