The term "highway system" refers to a network of roads that are designed to facilitate the movement of traffic between different locations. Some common synonyms for this term include freeway system, expressway system, motorway network, and interstate system. These terms are often used interchangeably, although they may have slightly different connotations. For example, a freeway system typically refers to a road network that is designed to provide high-speed, uninterrupted travel, while an expressway system may include toll roads and other features that are designed to improve the flow of traffic. Regardless of the specific term used, the purpose of these road networks is to provide an efficient and convenient means of transportation for people and goods.