The TRIS Online database contains over half a million records of published transportation research including technical reports, books, conference proceedings and journal articles. TRIS coverage includes the disciplines of planning, finance, design and construction, materials, environmental issues, safety and human factors and operations for the modes of highways, transit, railroads, maritime and aviation. TRIS does not contain information on vehicle standards and specifications, patent information, market research, military transport or news articles. TRIS focuses on transportation research. TRIS Online includes material indexed and abstracted by TRB as well as the material entered by the Transportation Libraries at the University of California at Berkeley and Northwestern University.