barricade

a barrier set up by police to stop traffic on a street or road in order to catch a fugitive or inspect traffic etc.

render unsuitable for passage

“barricade the streets”

block off with barricades

a barrier (usually thrown up hastily) to impede the advance of an enemy

“they stormed the barricade”

prevent access to by barricading

“The street where the President lives is always barricaded”