Transportation
- Aviation – Federal Aviation Administration (FAA) - Research and Data
- Bureau of Transportation Statistics (BTS)
- CAROL - Case Analysis and Reporting Online (NTSB search tool for investigations and recommendations)
- Emergency Response Guidebook (ERG) - PHMSA
- Highways, Roads & Bridges – Federal Highway Administration (FHWA) - Publications and Statistics
- Manual on Uniform Traffic Control Devices (DOT FHA)
- National Transportation Safety Board (NTSB)
- ROSAP - Repository and Open Access Portal (BTS/NTL)
- Pedestrian & Bicycle Safety (FHWA)
- Pipeline & Hazardous Materials Safety Administration - Resources: Data and Publications (PHMSA)
- SaferCar.gov
- TranStats – Bureau of Transportation Statistics (BTS)