Which of the following best describes the purpose of taxiway centerline markings?

• A. They indicate parking locations
• B. They mark emergency exit routes
• C. They guide taxiing aircraft and vehicles to prevent incursions and collisions
• D. They indicate runway occupancy limits

Answer: (C)

Taxiway centerline markings guide you along the taxi route, keeping aircraft and ground vehicles on the intended path to prevent incursions and collisions. The continuous yellow line down the middle of a taxiway is what you follow to stay on track, especially through turns and at intersections. This marking isn’t about where to park—that’s shown by apron and stand markings—nor is it about emergency exit routes, which are indicated by signs and other guidance. It also isn’t about runway occupancy limits, which are controlled by ATC and hold-short markings. By staying centered on the taxiway you reduce the risk of coming into conflict with other aircraft or vehicles and improve overall safety on the movement area.