Which best describes a Limited-Access or Controlled Access highway?

A Limited-Access or Controlled Access highway is characterized by the restriction of access points to improve safety and efficiency. In this type of highway, access is controlled by specific entry and exit points, such as ramps, rather than allowing vehicles to enter or exit freely at any location. This design reduces the potential for accidents that can occur with frequent access points and helps facilitate the uninterrupted flow of high-speed traffic.

The correct choice emphasizes that these highways are specifically regulated by law to limit access, which is an essential feature of their design. Proper signage is typically used to inform drivers of permitted access points, and the intent is to streamline travel and minimize conflict between high-speed vehicles and other traffic, particularly at intersections and driveways.

The other options do not correctly describe the nature of Limited-Access highways. For instance, designating a highway solely for public transport vehicles misrepresents the general use of controlled access roads, as they can be used by all types of vehicles under the set access rules. Similarly, claiming there are no access restrictions contradicts the very definition of controlled access, while unrestricted access for all would undermine the safety measures these highways are designed to uphold.