When using a milepost location, what must be included in the dispatcher's communication?

• A. Whole milepost number (Not tenths)
• B. Milepost number including tenths
• C. The exact mileage from the yard
• D. The block number.

Answer: (A)

When a location is given as a milepost, the reference should be the whole mile number. Mileposts are fixed integer markers along the track, and using the full mile number keeps the location unambiguous and aligned with how the markers are physically posted. Including tenths would introduce fractional positions that aren’t part of the standard milepost reference and can lead to misreading or miscommunication over the radio. The other options describe different ways of locating a train (from the yard or a block number) and aren’t the format used when the instruction specifies a milepost location.