Which of the following is a sign of tire failure?

The presence of sound, vibration, or steering issues is a clear indication of tire failure. When tires begin to fail, they can produce unusual noises due to structural damage or improper inflation. Additionally, a driver may experience vibrations as the tire’s integrity diminishes or if there is an imbalance or a flat spot. Changes in how the vehicle steers, such as pulling to one side, can signal that a tire is compromised, which affects the vehicle's handling and safety. Recognizing these signs is crucial for a bus driver, as it ensures the safety of the passengers and helps prevent further complications on the road.

Other signs like color change, flat tire light, or temperature fluctuation might indicate various issues, but they do not directly reflect the immediate mechanical concerns that sound, vibration, and steering problems do.