Which organization is part of the U.S. Department of Transportation?

The National Highway Traffic Safety Administration (NHTSA) is indeed a part of the U.S. Department of Transportation (DOT). This organization plays a crucial role in ensuring the safety of highways and roadways across the country by setting regulations, conducting research, and promoting safe driving practices. The NHTSA develops policies aimed at reducing fatalities and injuries resulting from motor vehicle crashes, and it is involved in vehicle safety standards, traffic safety initiatives, and educational campaigns.

In contrast, other options represent organizations that, while they may work alongside or in relation to transportation issues, belong to different federal agencies. The Environmental Protection Agency focuses on environmental protection, the Federal Aviation Administration is primarily concerned with regulating civil aviation, and the Occupational Safety and Health Administration is dedicated to worker safety and health. Each of these agencies has distinct roles and responsibilities, separate from the transportation-related focus of the NHTSA under the DOT.