The **acceleration lane** is a type of lane specifically designed to allow vehicles wishing to enter a road to do so safely and efficiently. The main function of this lane is to enable drivers to **adjust their speed** to match that of the vehicles already traveling on the main road. This is crucial for a safe and smooth merging into traffic.

- **Merging onto the road**: By using the acceleration lane, drivers can gradually increase their speed to reach an appropriate speed that allows them to integrate into the traffic flow without causing disruptions or dangerous situations.

- **Appropriate speed**: It is not about reaching a specific speed, such as 120 km/h, but about adapting to the **traffic conditions**. This means that the speed should be adjusted according to the existing traffic, road conditions, and current speed regulations.

- **Safety**: By entering the road at an appropriate speed, the risks of collisions are minimized, and a smooth transition between the acceleration lane and the main road is facilitated.

In summary, the acceleration lane is essential for a safe and efficient merging onto a road, allowing drivers to adjust their speed to the traffic conditions.