Roadblock

A roadblock is a temporary installation set up to control or block traffic along a road. The reasons for one could be:

In 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)

Pink bunny-shaped roadblock in Narita (Japan)

Roadblock during roadworks at Hisingen, Sweden, 2013

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Wikipedia