When entering a motorway via the **acceleration lane**, it is essential to **adjust the vehicle's speed** so that it is **appropriate for the lane you are merging into**. This means you should accelerate to reach a speed that allows you to merge smoothly and safely with the traffic already on the motorway.

- **Adjusting the speed** is crucial to avoid dangerous situations, such as having to stop at the end of the acceleration lane, which could cause accidents or disruptions in the traffic flow.
- **Driving at the maximum permitted speed** without considering the existing traffic can be dangerous, as you might block other drivers or not have enough space to merge safely.

Therefore, the key is to find a balance in speed that allows you to merge safely and efficiently into the motorway traffic.