Hans Hagerup Krag was a Norwegian engineer.

He was hired as an engineer in the Norwegian Public Roads Administration

Norwegian Public Roads Administration

The Norwegian Public Roads Administration is a Norwegian government agency responsible for the state and county public roads in the country. This includes planning, construction and operation of the state and county road networks, driver training and licensing, vehicle inspection and subsidies to...

 in 1852, and served as director of the Norwegian Directorate of Public Roads from 1874 to 1903. Also, together with Thomas Heftye he founded the Norwegian Mountain Touring Association

Norwegian Mountain Touring Association

The Norwegian Trekking Association is a Norwegian association which maintains mountain trails and cabins in Norway. The association was founded on 21 January 1868 with the scope "to help and develop tourism in this country". Today the goal is to work for simple, secure and environmentally friendly...

 in 1868. From 1879 to 1883 and 1893 to 1895 he was the chairman of the Norwegian Polytechnic Society.