road narrows sign on pole post, right side, large detailed closeup, triangular traffic signage

accident advice ahead alert attention background beware black careful caution claustrophobia closeup cutout detailed direction drive driving europe european fear future highway isolated lack large macro metal metallic metaphor narrows notice options pole post restriction right road roadside roadsign roadway route rule rules side sign signage signboard signpost slow speed squeezed symbol symbols traffic triangle triangular warn warning white yield