4HD Inc. was incorporated in Lombard IL by Engineer Renad Alrousan. 4HD Inc. is a construction inspection services and research with multi-disciplined Civil Engineering firm specializing in the IDOT, CDOT, ISTHA, Chicago Transit Authority (CTA) METRA, and PACE. Our Engineers have extensive transportation experience and our goal to serve both public and private organizations with diversified of expertise to include: 4HD Inc. is a construction inspection services and research with multi-disciplined Civil Engineering firm specializing in the IDOT, CDOT, ISTHA, Chicago Transit Authority (CTA) METRA, and PACE. Our staff have extensive transportation experience and our goal to serve both public and private organizations with diversified of expertise to include: Construction Engineering and Management Construction Materials Engineering Environmental Engineering Transportation Engineering Project Management Planning and Scheduling