Sources of information for content on this site originated from the following sources; the list is not comprehensive and is updated regularly:

Government

• National Highway Traffic Safety Administration (NHTSA)
• National Transportation Safety Board (NTSB)
• Defense Advanced Research Projects Agency (DARPA)
• US Department of Transportation (USDOT)
• California Department of Transportation
• Arizona Department of Transportation
• Nevada Department of Transportation
• Germany Federal Ministry of Transport
• Sweden Transport Agency