What is a common carrier required to obtain for interstate traffic?

A common carrier engaged in interstate traffic must obtain a certificate of public convenience and necessity. This certificate is essential as it demonstrates that the carrier is authorized to operate in interstate commerce, thus ensuring compliance with federal regulations. The process of obtaining this certificate involves proving that the carrier's services are needed and beneficial for the public, which plays a crucial role in regulating the transportation industry and ensuring that services are available where they are most needed.

In the context of interstate transportation, this certificate serves as a means to protect both the carrier and the public, establishing a legal framework within which the carrier can operate. Without it, a common carrier cannot legally transport goods across state lines, making it a fundamental requirement for any carrier looking to serve customers beyond state borders.