guideway

/ˈɡaɪdˌweɪ/
noun
  1. A track or path that guides the movement of a vehicle, especially in a transportation system.
    • Automated people movers often use a dedicated guideway to avoid traffic.
    • Engineers inspected the guideway for any cracks or damage before reopening the line.
    • The new monorail runs along a concrete guideway elevated above the city streets.