Road Construction, water supply, sewerage, electrical works on roads, production of asphalt, concrete,
and other construction materials certified according to ISO Standards: ISO 9001: 2008 , ISO 14001: 2004 , OHSAS 18001: 2007 , PASS 99: 2012 , ISO / IEC 27001: 2013 , ISO 39001: 2012 , ISO 50001: 2011 , ISO 3834-2: 2015