Final answer:
When you see a "wide load" sign on an oversized vehicle, you should slow down and proceed with caution. This gives the vehicle space and ensures road safety.
Step-by-step explanation:
If you approach an oversized vehicle marked with a "wide load" sign, the correct action to take is to slow down and proceed with caution. This ensures that you give the vehicle enough space to maneuver if needed and also helps to prevent any accidents due to the vehicle's extended dimensions. Honking your horn, passing the vehicle quickly, or ignoring the sign are not advised as they could create dangerous situations on the road, both for you and for other drivers.
It's important to note that patience and safety should be your top priorities when sharing the road with oversized vehicles. Remember that the drivers of these vehicles may have limited visibility and require more room to make turns or stop.