What may be used to designate the limits of a Track Authority outside CTC Territory?

• A. Locations such as station names, mile posts or other clearly identifiable point
• B. Distances measured from the entrance point
• C. Time-based route segments
• D. Color-coded track sections

Answer: (A)

Limits of a Track Authority outside CTC Territory must be defined by fixed, easily identifiable points along the track. Using station names, mile posts, or other clearly identifiable points provides a precise, unambiguous boundary that both the dispatcher and the crew can reference in orders and on the ground. Distances from an entrance point can be confusing if there are multiple entrances or if the track layout changes. Time-based route segments depend on speed and schedules and can drift, creating uncertainty. Color-coded track sections aren’t a formal boundary reference and may not be consistently visible or understood in all conditions. So, referencing fixed points like stations or mile posts gives the clearest, most reliable limits for Track Authority.