Which term refers to a highway where access points are limited and controlled?

The term that refers to a highway where access points are limited and controlled is "Controlled-access Highway." This type of highway is designed to facilitate the smooth flow of traffic without interruptions from intersecting roads, driveways, or pedestrian crossings. The limited access is achieved through ramps, overpasses, and underpasses, which allows vehicles to enter and exit without impacting the overall speed and efficiency of traffic flow.

Controlled-access highways ensure safety and efficiency by minimizing conflicts between vehicles and non-motorized traffic, as well as reducing the likelihood of accidents that can occur with frequent access points. They are essential for long-distance travel and for connecting major urban areas, providing a route for high-speed traffic while maintaining a focus on controlled entry and exit points.

The other terms, while related to road types, do not specifically emphasize the control of access points. An expressway may have some characteristics of controlled access, but not all expressways are strictly controlled in the same way. A freeway is another term that suggests limited access, but "controlled-access highway" is the term that most precisely defines the concept of controlled points of entry and exit. A main road generally refers to a primary route within a locality, which may not have limited access features.