Keywords: Road work ahead (9245786041).jpg Group of highway workers using jackhammers to remodel a highway https //www flickr com/photos/niosh/9245786041/ Road work ahead 2013-07-09 09 32 https //www flickr com/people/25069384 N03 National Institute for Occupational Safety and Health NIOSH from USA PD-USGov NIOSH http //flickr com/photos/25069384 N03/9245786041 2015-04-24 01 51 39 United States Government Work Construction Safety Work Workplace National Institute for Occupational Safety and Health |