What constitutes the access rights to a Limited-Access highway?

Answer: B — Access restricted by law at specific points

Access rights to a Limited-Access highway refer specifically to the controlled manner in which vehicles can enter and exit the highway. The correct answer highlights that access is restricted by law at specific points, which is a defining characteristic of limited-access highways. These highways are designed to enhance traffic flow and safety by minimizing traffic interruptions, thus access points are strategically placed to manage entries and exits effectively. This means that only designated areas allow vehicles to enter or exit the highway, which helps maintain higher speeds and reduce the risk of accidents caused by sudden stops or the merging of traffic. The restrictions serve the purpose of preventing vehicles from crossing the highway at any given point, ensuring that traffic can move more efficiently. Other options do not align with the fundamental principles guiding limited-access highways. For example, unrestricted access would undermine the intended efficiency and safety these highways aim to provide, while access for non-residents only and free access for emergency vehicles do not accurately reflect the legal restrictions placed on limited-access highways or their operational design.