To safely execute a maneuver to enter a road, it is essential to follow the **R.S.M. safety rule**. This rule indicates that you must observe, signal, and then execute the maneuver. Part of this signaling includes maintaining the signals from the approach phase, such as using lights or your arm to indicate the intention to enter the road. This is crucial for other drivers to be aware of your movements and to act accordingly, thus avoiding dangerous situations.

Additionally, when entering a road, it is important to **yield** to vehicles already traveling on it, ensuring that you do not become an obstacle. This applies to all drivers, regardless of the type of vehicle they are driving. Proper and constant signaling throughout the entire maneuver is essential to maintain safety and traffic flow.

Therefore, the correct answer is that **yes, the signaling from the approach phase must be maintained** during the entry position phase, as it is an integral part of a safe and responsible maneuver when merging onto a road.