a vibrant yellow sign reading 'under construction' with black and yellow stripes, indicating ongoing work

construction sign safety vibrant yellow read black stripe indicate work hazard framework update signal signage labor alert improvement banner message urban attention standard approval symbol equipment notice problem closure obstruction roadway graphic protection precaution industry barrier caution announcement event design contractor worker project property maintenance display management landscape reading #39aph39#under construction#39aph39# stripes indicating measures generative