The road barrier prevents unauthorized access.

The sound barrier protects the residential area from traffic noise.

The sound barrier protects the residential area from traffic noise.

The coral reef is full of marine life.

The language barrier can create difficulties in communication.

The sound barrier has been broken by supersonic aircraft.

The tollgate \/ tollroad \/ toll bridge barrier is automatic.

I paid the toll at the highway toll booth.

The guardrail along the road ensures the safety of the drivers.