Answer :
Final answer:
The described traffic sign indicating that the lane ends and instructing to merge left is a warning sign, alerting drivers of upcoming road changes and advising them on the action to take.
Explanation:
The traffic sign described is an example of a warning sign. This type of sign is designed to alert you of potential road conditions or changes ahead, such as the end of a lane, and advise on what actions to take, such as merging from the right lane to the left. Warning signs typically have a yellow background and are diamond-shaped or have other distinct shapes that differentiate them from regulatory, informational, and guide signs, which have their unique shapes and colors.