When you see this sign, you:

The correct answer and explanation is:
The sign shown in the image is a railroad crossing warning sign. In California, as well as in most places in the United States, this type of sign alerts drivers to the presence of a railroad crossing. The specific sign in the image features a white background with a black outline and typically displays the words “RAILROAD CROSSING” in capital letters. It may also include a symbol of a railroad track or additional text indicating the number of tracks or any other information relevant to the crossing.
When you encounter this sign while driving, you must slow down and be prepared to stop if a train is approaching. Here’s what you should do:
1. Look and Listen
As you approach the railroad crossing, pay close attention to your surroundings. Look both ways down the tracks and listen carefully for any train signals, such as the sound of a train whistle or bells. Trains can sometimes be difficult to spot at a distance due to obstructions, so you must be vigilant.
2. Stop if Necessary
If the crossing signals are flashing (such as red lights or bells) or if a train is coming, you must stop at least 15 feet before the tracks. Do not attempt to drive around crossing arms or proceed if it is unsafe. Even if the signals aren’t flashing, you should always stop and check for trains before crossing.
3. Cross Only When Safe
After stopping, wait until you can see that the tracks are clear in both directions. You should never cross the tracks if you are unsure about whether a train is approaching.
4. Avoid Stopping on Tracks
Never stop on the railroad tracks. If traffic is heavy and you are stuck on the tracks, wait until the tracks are clear before proceeding. Stopping on the tracks puts you at great risk of being struck by a train.
Conclusion
Railroad crossings are extremely dangerous, and it is crucial to approach them with caution. The warning signs and signals are in place to keep drivers and passengers safe, and failure to follow these guidelines can result in serious accidents. Always prioritize safety when encountering a railroad crossing sign.