Update: The Washington Post reported:
“The White House is getting a taller fence as part of security improvements beginning this summer for the perimeter of the grounds.
Crews will replace the fence with a structure that will be about 13 feet tall, an increase of about five feet.”
So these barriers are just temporary while the new fence goes up. Thanks to all who messaged for the info.
Thanks to Meaghan for sending:
“It appears new barriers are going up at the White House. They are concrete barricades with wood planks on top. Their purpose seems to be to obstruct the view of who is going in and out; since they are placed up against the sidewalk, which see-through gate barriers are already placed against.”