United States. Public Roads Administration.

• Exhibit of the Office of public roads
• Highway practice in the United States of America
• Report of a study of the California highway system
• A classification scheme for highway engineering
• Legal aspects of controlling highway access
• Model state enabling act empowering state highway departments to construct and maintain freeways and parkways
• Report on the Cincinnati metropolitan traffic survey
• Specifications for construction of roads and bridges in national forests and national parks, 1941