Give at least 5 agencies involved in traffic management and give their functions

Federal Highway Administration (FHWA): This agency is part of the U.S. Department of Transportation and is responsible for the management of the federal highway system. They provide financial and technical assistance to state and local governments to construct, preserve, and improve the highway system.

National Highway Traffic Safety Administration (NHTSA): This U.S. agency is responsible for ensuring the safety of motor vehicles and road users. They enforce vehicle performance standards and regulations, promote road safety, and provide educational materials on traffic safety.

State Department of Transportation (DOT): Each state in the U.S. has its own DOT that is responsible for the state's transportation infrastructure. This includes managing, maintaining, and improving state highways and roads.

Local Traffic Management Agencies: These are local government bodies responsible for managing traffic within a city or county. They handle traffic signals, signage, road maintenance, and local traffic regulations.

Transportation Security Administration (TSA): While primarily known for their role in airport security, the TSA also plays a role in highway and road security. They work to ensure the security of all modes of transportation, including roads and highways.