A section of that street, at Massachusetts Avenue, was closed for some time and people were advised to avoid the area.
The future of fusion energy is right around the corner. You'll find it off Massachusetts Avenue:
Investigation Update: Arrest Made in Homicide Investigation in the area of Massachusetts Avenue and Albany Street in Boston
MPD seeks the public's assistance in identifying & locating a vehicle in an Assault w/ Intent to Kill offense that occurred on 7/30/19 in the 3rd Street Tunnel near Massachusetts Avenue, NW. Press Release here: Have info? Call (202) 727-9099/text 50411