What are the three types of fixed route systems in air traffic control?

The three types of fixed route systems in air traffic control are airways, jet route systems, and RNAV routes. Airways are designated corridors in which aircraft are expected to fly, providing a structured path for navigation. Jet route systems are specifically designed for high-altitude flight operations, allowing for the efficient movement of jet traffic, particularly in en-route phases. RNAV (Area Navigation) routes provide more flexibility, enabling aircraft to navigate based on their own internal navigation systems, rather than being constrained to traditional airways.

This combination allows for a comprehensive approach to managing air traffic, balancing both the needs for structured routing and operational efficiency.