When is it permissible to not require adjacent controlled track on-track safety?

The situation in which it is permissible to not require adjacent controlled track on-track safety is when all ground roadway workers are exclusively positioned correctly. This indicates that the workers are in a safe location where they are not exposed to the risks associated with train movements on the adjacent track.

Ensuring that all workers are positioned correctly is crucial in maintaining a safe working environment. It means they are either inside a designated work zone that has been established to prevent unauthorized access or are in a secure area where they can safely operate without the risk of being in proximity to train operations. This reflects a well-coordinated safety protocol where the proper measures are in place to protect the personnel involved in track work.

Other scenarios presented in the alternatives may not provide a comprehensive assurance of safety. For instance, the presence of nearby on-track workers, delays in train movements, or the end of a shift do not inherently guarantee that safety measures have been properly adhered to, leaving potential risks unaddressed.