Which statement is true?

You must stop at a railroad crossing when directed to do so by a flagger, stop sign, or warning signal. Use caution when driving near railroad tracks.

• You should put on your cruise control near a railroad crossing to maintain a constant speed.
• You must stop at a railroad crossing when directed to do so by a flagger or stop sign.
• You have the right-of-way at a railroad crossing and do not need to stop.