I noticed these on my ride recently. The DC8 Totem Poles that were previously displayed on H Street NE have been moved to the Metropolitan Branch Trail.
The eight totems symbolize the eight wards of DC, and were created by artist Wilfredo Valladares. I think they’re a great addition to the trail. You can see them near the Rhode Island Avenue/Brentwood entrance.
The press release from the DC Commission on the Arts and Humanities is here.