Final answer:
Interstate Highway is the definition of a divided, controlled-access highway for through traffic.
Step-by-step explanation:
A divided, controlled-access highway for through traffic is defined as an Interstate Highway. The Interstate Highway System was established in the United States as a network of high-speed, multi-lane highways connecting major cities and serving as the primary arteries for long-distance travel. These highways are designed for efficient and safe travel, with limited access points and restricted entry and exit ramps. They are typically identified by numbers with the prefix 'Interstate', such as Interstate 405 in Los Angeles.