What must be maintained while shifting gears?

Maintaining a view of the road while shifting gears is crucial for the safety of both the driver and the passengers. A driver must be fully aware of their surroundings, including other vehicles, pedestrians, and any potential hazards on the road, as this awareness allows for safe maneuvering. Focusing on the road ensures that the driver can react quickly to any sudden changes or obstacles, preventing accidents.

In contrast, while speed of the bus is important for safe driving, it is not the primary focus during the process of shifting gears. The sound or temperature of the engine, although relevant to the overall maintenance of the vehicle, does not directly aid in the immediate requirement of being aware of the driving environment while gearing. Thus, maintaining a clear view of the road is vital for effective and safe gear shifting.