The road is continually changing. Weather conditions, road conditions, other road users, and several other factors could affect it.

A good driver recognizes these changes and accommodates them accordingly.

Flexibility and adaptability are necessary; failure to do so could harm them and other road users. 

Adjusting communication based on observation of the driving environment and other road users is essential to safe driving. It involves adapting one's driving style to the road conditions and other road users' behaviour to avoid accidents and promote courteous driving.

One example of adjusting communication based on observation is when a driver approaches a pedestrian crossing. In this situation, the driver should observe the pedestrian's behaviour and adjust their driving accordingly. If the pedestrian appears to be waiting to cross, the driver should slow down and stop, signalling to the pedestrian that it is safe to cross. On the other hand, if the pedestrian appears distracted or unsure of what to do, the driver should use their horn to get their attention and ensure they are aware of the vehicle's presence.

Another example is when a driver encounters another vehicle merging onto the highway. In this situation, the driver should observe the behaviour of the merging vehicle and adjust their driving accordingly. If the merging vehicle appears to be accelerating smoothly and merging into the traffic flow, the driver should adapt their speed to maintain a safe following distance. However, if the merging vehicle is having trouble merging or appears to be moving erratically, the driver should slow down or change lanes to avoid a potential accident.

In both examples, the driver adjusts their communication and driving behaviour based on observing the driving environment and other road users. This is a crucial aspect of safe and responsible driving, as it helps to avoid accidents and promote courteous driving behaviour.