You are approaching a railroad crossing and you do not see or hear a train. You must stop:

1. If a stop sign is posted.
2. If a crossing gate is lowered.
3. If the crossing lights are flashing.
4. All of the above. ✓

Answer: D. All of the above.

You must stop for all of the above: a posted stop sign, a lowered crossing gate, or flashing crossing lights.

Why this is the answer

Texas rules list several separate reasons to stop at a crossing, so the safe choice is all of them. The handbook says to stop when a crossing gate is lowered and to remain stopped until the train passes and the gate rises. It also says to stop when red lights are flashing. A posted stop sign is an official traffic-control device, and the handbook says you must stop when an official traffic-control device requires it. Because each warning works on its own, you do not wait to see or hear a train before stopping.

Why the other answers are wrong

• A. If a stop sign is posted. — Stopping only for a posted stop sign leaves out the handbook's separate stop requirements for lowered gates and flashing crossing lights.
• B. If a crossing gate is lowered. — Stopping only for a lowered gate is incomplete because flashing lights and a posted stop sign also require you to stop.
• C. If the crossing lights are flashing. — Stopping only for flashing lights is incomplete because a lowered gate and a posted stop sign also require you to stop.

Remember it

At tracks, treat any warning as a stop order: sign, light, or gate.