Final answer:
The reflective orange triangle sign signifies a slow-moving vehicle; the proper action would be to slow down and pass safely, taking caution.
Step-by-step explanation:
If you approach a vehicle displaying a reflective orange triangle sign on the rear, you must recognize that this sign indicates the vehicle is a slow-moving vehicle, often used in agricultural, road maintenance, or construction settings. The appropriate action to take is not listed here, but typically, you should slow down and proceed with caution, giving the vehicle a wide berth. The options given:
- Stop moving and become stationary till it passes by.
- Run toward the ambulance.
- Run alongside the ambulance.
are not accurate actions to take. You should definitely not run toward or alongside the vehicle, and becoming stationary may not be necessary unless the situation or traffic rules require it. Instead, slowing down and safely passing the vehicle when it's safe to do so is the correct behavior.