Vejdirektoratet is the national road administration with a total staff of some 800 employees working with planning, maintaining and construction of the main road infrastructure. VD also fulfills a role developing new methods and solutions for the entire Danish road sector. The Planning division is working with road and transport planning and economics as well as performing transport surveys and analyses such as the yearly Danish Travel Survey.

Vejdirektoratet undertakes research and development, laboratory testing of materials and provides road condition measurements and consultancy services for road infrastructure management. VD has a research group of seven noise specialists and equipment for SPB, CPB and CPX noise measurements. In recent years both durable and noise reducing asphalt types have been appointed high priority areas. VD performs comprehensive research projects integrating acoustical knowledge and materials technology.