accustic emergancy signal emergency horn old horn rescue car signal clouds cloudy coast grate grating green grid lamp light metal pilar pile sea shore sign Signals signs statue white communication electric iron journey pebbles post pylons rail rails railway railways rocks semaphore sky stones train trains transportation travel voyage weather barrier brasil Brasília brazil car forbidden impediment information not to exceed orientation policy road shunting line signaling street to exceed to hinder traffic transit blue floor ground park space wave of parking cold war instrument military radiation signalling alarm alert alerting Break-In breaking-in burglar-alarm-light cobwebs communicating crime exterior external fixture flashing-light home house outside private-home safety secure security warn warning