What are the components of highway system?

The components of a highway system typically include the roadway, which consists of lanes for vehicle travel; shoulders for emergency stopping and breakdowns; interchanges and intersections for traffic management; and signage for navigation and safety. Additionally, it encompasses drainage systems to manage water runoff, barriers for safety, and rest areas for driver convenience. Supporting infrastructure, such as bridges and tunnels, also plays a critical role in maintaining connectivity within the highway system.