"A roadblock is a temporary installation set up to control or block traffic along a road. The reasons for one could be:
RoadworksTemporary road closure during special eventsPolice chaseRobberySobriety checkpointIn peaceful circumstances, they are usually installed by the police or road transport authorities; they are also commonly employed during wars and are usually staffed by heavily armed soldiers in that case. During protests and riots, both police and demonstrators sometimes use roadblocks.
Roadblock in the West Bank
Polish barricade during the Warsaw Uprising (1944)" - (en.wikipedia.org 28.04.2020)
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