What is positive train control (PTC)?

Positive Train Control (PTC) is a sophisticated technology system that is primarily designed to enhance rail safety by automatically preventing train accidents. It does this through a combination of GPS, wireless radio, and onboard computing. The system can take control of train operations to stop or slow a train if certain unsafe conditions are detected, such as potential collisions, over-speed situations, or unauthorized movements onto tracks where work is being conducted.

This automatic stopping feature is essential for minimizing human error, which is a significant factor in many rail accidents. By intervening in critical situations, PTC aims to ensure that trains operate within safe parameters, thus greatly reducing the risk of accidents and improving the overall safety of rail travel.

While the other options describe various systems and functions within rail operations, they do not capture the core purpose of PTC, which is to enhance safety through proactive accident prevention.