caution on the road: safety cones surrounding open manhole for repair alert

street road roadwork urban cones secure safeguarding obstruction manholecover city municipal construction orange public safetyfirst maintenancework open streetmaintenance danger prevention pavement alert equipment repairarea safety repair attention maintenance caution signage awareness safetycones repairwork hazard traffic barrier streetwork manhole streetrepair infrastructure engineering protection urbanrepair securement warning safetymeasure