The engineer improved the solar cell's efficiency by optimizing the Schottky barrier at the metal–semiconductor interface.

The parking attendant lifted the boom barrier to let the delivery truck into the lot.

The toll plaza's boom barriers malfunctioned during rush hour, causing a long line of frustrated drivers.

After the crash, marshals moved the damaged tyre barriers away from the racing line to clear the track.

The wildlife refuge on the barrier island provides critical nesting habitat for migratory birds.

The research team installed sonic barriers around the test site to study how they influence airflow and sound propagation.

The migratory birds rested on the barrier islands during their long journey.

Local barrier reefs protect coastal communities by reducing the force of incoming waves and supporting diverse marine life.

Many textbooks describe the speed of light as the Einstein barrier, emphasizing that it cannot be crossed by accelerating from subluminal to superluminal velocities.

The workers installed barrier boards along the roadside to protect pedestrians during the construction.