Which of the following is NOT a condition for maintaining on-track safety?

Relying solely on verbal warnings is not a condition for maintaining on-track safety because this approach does not provide a reliable or comprehensive means of ensuring safety around train operations. Effective safety practices require multiple layers of protection to prevent accidents and ensure that all personnel are aware of potential hazards.

Establishing a written safety statement is important as it formalizes safety protocols and ensures that all team members understand the expectations for safety practices. Staying alert to approaching trains is critical for on-track safety, as it helps individuals to respond quickly to potential dangers. Using individual train detection systems enhances safety by offering technological support to detect trains, thus reducing the likelihood of human error. Each of these conditions contributes to a robust safety framework, while relying solely on verbal warnings lacks the necessary redundancy and situational awareness that are vital for maintaining safety around rail operations.