The limits of the Form D authority must be designated by?

The limits of the Form D authority must be designated by?

• A. Whole mile post numbers
• B. Station names or Whole mile post numbers
• C. Time of day
• D. Distances in miles

Answer: (B)

The limits of Form D authority are defined using fixed reference points along the track so everyone can precisely locate where the authority begins and ends. Station names provide known, published points along the route, and milepost markers give exact locations measured from a standard starting point. Either method clearly identifies endpoints, which is essential for safety and compliance, because the authority must be tied to a specific geographic stretch of track. Time of day cannot designate the limits, since the location on the track doesn’t change with the clock. Distances in miles alone also don’t specify where the segment starts, making it possible to interpret the same distance as different sections of track. By using station names or whole mile post numbers, the limits are unambiguous and consistently referenced in operating rules and instruction. So the limits are designated by station names or whole mile post numbers.

The limits of Form D authority are defined using fixed reference points along the track so everyone can precisely locate where the authority begins and ends. Station names provide known, published points along the route, and milepost markers give exact locations measured from a standard starting point. Either method clearly identifies endpoints, which is essential for safety and compliance, because the authority must be tied to a specific geographic stretch of track.

Time of day cannot designate the limits, since the location on the track doesn’t change with the clock. Distances in miles alone also don’t specify where the segment starts, making it possible to interpret the same distance as different sections of track. By using station names or whole mile post numbers, the limits are unambiguous and consistently referenced in operating rules and instruction.

So the limits are designated by station names or whole mile post numbers.