The book "Address of the Honorable William C. Redfield, Secretary of Commerce, to the Conference of Regional Chairmen of the Road Transportation Committee of the Council of National Defense" is a documentary record of an important historical event. In his speech, the US Secretary of Commerce discusses the strategic importance of transportation infrastructure in ensuring the country's national defense. It reveals the importance of proper organization and management of the transportation system to ensure efficiency in the event of military threats and crisis situations. This book is an invaluable resource for those interested in the history of transport and the interplay between commerce and defense during the First World War.