Final answer:
The road sign described, which is a stair-like arrow that goes up, indicates an upward direction or an incline. It is commonly used to indicate an uphill road or a steep ascent ahead.
Step-by-step explanation:
The road sign described, which is a stair-like arrow that goes up, indicates an upward direction or an incline. It is commonly used to indicate an uphill road or a steep ascent ahead. This sign is used to warn drivers to prepare for a change in road elevation and adjust their speed accordingly.