What is the primary advantage of using Frontage Roads?

The primary advantage of using frontage roads is to enhance access to expressways. These roads run parallel to main highways, allowing drivers to enter or exit the expressway more easily and safely. By providing access points, frontage roads reduce the need for drivers to navigate directly on the busy expressway to reach businesses or residential areas. This design helps maintain traffic flow on the expressway itself while giving local traffic easier routes to destinations, thereby improving overall accessibility.

While reducing traffic congestion is a benefit that can come from better access management, it is not the main purpose of frontage roads. Similarly, minimizing travel distance and increasing vehicle speed are not inherent advantages of frontage roads; their primary function is facilitating access rather than enhancing speed or reducing distances.