Final answer:
The subject of this question is Traffic Signs. Specifically, the student is asking about the meaning and interpretation of a road sign that has black signs on a yellow background, with the text 'Passing must be completed before reaching this sign.'
Step-by-step explanation:
The subject of this question is Traffic Signs. Specifically, the student is asking about the meaning and interpretation of a road sign that has black signs on a yellow background, with the text 'Passing must be completed before reaching this sign.'
These types of signs are typically found on roads where passing is not allowed after reaching the sign. This means that if a driver wants to overtake another vehicle, they must do so before they reach this sign.
Examples of other road signs include stop signs, speed limit signs, and yield signs, which provide important information and instructions to drivers.