The streets of Casselton were improved through municipal and state efforts. In 1927, the downtown roads were graveled. In 1930, as a US Works Progress Administration project under the President Franklin D. Roosevelt administration during the Great Depression, the federal government paid local workers to pave State Highway No. 18 through the city. After World War II, the business district streets were paved with concrete. Since that time, all streets and avenues have been hard-topped, and a modern storm sewer system was installed at the same time.