Information about transportation-related laws, reports and other materials is available from the National Transportation Library, the Northwestern University Transportation Library and the Federal Highway Administration Research Library.
Many reports and other transportation-related documents are available free online from the NTL Digital Repository.
The American Association of state Highway and Transportation Officials publishes books on highway construction, finance and design sold through the AASHTO Bookstore.
Accidents:The useful transportation accident databases include the:
- NTSB Current Investigations
- NTSB Accident Reports back to 1962 (with narratives back to 1993) for Aviation, Highway, Marine, Pipeline, Hazardous Materials and Railroad accidents;
- NTSB Safety Recommendations usually based on "a specific problem uncovered during an investigation or study" with instructions on "how to correct the situation;"
- FAA Aviation Safety Information Analysis and Sharing System (ASIAS) for accidents not investigated by the NTSB;