Final answer:
A merge sign, often recognized by an arrow symbol, indicates where two lanes of traffic come together and is an important part of maintaining road safety.
Step-by-step explanation:
The sign that indicates the road you are on merges with another is typically known as a merge sign. This type of sign is universal and features a symbol or an arrow indicating that two lanes of traffic are coming together. Drivers should be prepared to either merge into the other lane or allow other traffic to merge into their lane. This is a critical part of road safety and helps prevent accidents at points where traffic flows come together. Always be alert and ready to yield to other drivers when you see a merge sign while driving.