i Register
In some senses, roadblock is marked as figuratively, informal, idiomatic. Watch for register when choosing this word.
ADJ
army, police
VERB + ROADBLOCK
erect, set up
The army erected a roadblock at the entrance to the city during the emergency.
remove
PREP
at a/the ~
Police officers checked our documents at the roadblock on the highway.
through a/the ~
The protesters managed to break through the roadblock and reach the government building.