What is the required visibility standard for taxiing during adverse weather conditions?

The required visibility standard for taxiing during adverse weather conditions is indeed 1 mile. This measurement is based on regulations set by aviation authorities, which are designed to ensure the safety of ground operations. As visibility decreases due to adverse weather, such as fog, rain, or snowfall, pilots and air traffic controllers must adhere to these standards to maintain safe operations on the taxiway. A visibility requirement of 1 mile allows for sufficient visual reference for pilots to navigate the aircraft safely while also considering the factors that can affect visibility further. This standard ensures that pilots can adequately see the airport environment, including taxiway markings and light signals, thereby reducing the risk of accidents.

The other options, which suggest higher visibility requirements, may be applicable to other phases of flight or different flight operations, but for taxiing specifically, the 1-mile visibility standard is necessary to balance safety with operational capabilities.