If a yellow flag is observed and there is no track bulletin, what must be verified before resuming normal speed?

• A. The rear flag has been passed
• B. Dispatch has verified no track warrant is in effect
• C. The engineer has completed a rest break
• D. The conductor has logged the event in the ledger

Answer: (B)

When you see a yellow flag, you’re entering a protected or restricted portion of track and you must ensure the track is truly clear before changing your movement. If there’s no track bulletin, the only reliable way to know you can return to normal speed is to have Dispatch verify that no track warrant is in effect for that segment. A track warrant is an official authority that can still govern movement on the track, so confirming that none is active ensures there won’t be another train or work crew moving into the area unexpectedly.

Passing a rear flag doesn’t by itself clear the restriction on your train, and a rest break or logging the event in the ledger doesn’t address track authority. Dispatch verification is the essential step to confirm safe conditions before resuming normal speed.