Final answer:
The center lane sign is diamond-shaped and orange. It indicates a center turn lane, which is a lane in the middle of a road that is specifically intended for vehicles to use when making left turns.
Step-by-step explanation:
The center lane sign is indeed diamond-shaped and orange in color. This sign is used in the United States to indicate a center turn lane. The center turn lane is a lane in the middle of a road that is specifically intended for vehicles to use when making left turns from or into the road.
The center turn lane is separated from the rest of the lanes by solid yellow lines on each side. It provides a safe space for drivers to wait for a gap in oncoming traffic before making their left turn. It is important for drivers to use this lane properly by signaling their intentions, checking for oncoming traffic, and only using the lane for turning purposes.