Which federal agency regulates highway construction standards?

The Federal Highway Administration (FHWA) is the agency responsible for regulating highway construction standards in the United States. Established in 1966, the FHWA operates under the Department of Transportation and focuses on ensuring safe, efficient, and environmentally sustainable highway transportation. This includes setting guidelines and standards for highway design, construction, and maintenance, which are crucial for promoting public safety and maintaining the integrity of the nation's highway system.

The FHWA oversees the implementation of federal funding for highway projects and works closely with state and local transportation agencies to ensure that construction practices meet federal standards and align with national transportation policies. This includes compliance with safety standards, environmental regulations, and innovative construction techniques aimed at improving overall infrastructure quality.

The other agencies listed are focused on different areas: FEMA deals with disaster response and management, the EPA addresses environmental protection and regulations, and OSHA focuses on workplace safety standards in various industries. Therefore, the role of overseeing highway construction standards distinctly falls to the FHWA, making it the correct choice in this context.