Which of the following is NOT a factor to consider before using airfield roads?

When considering factors before using airfield roads, it's crucial to focus on conditions that directly impact safety and operational efficiency. Weather forecasts, while important for overall flight operations, are not a specific consideration when assessing immediate airfield road usage. The other factors—obtaining clearance, understanding traffic conditions, and acknowledging proper signage—are all critical to ensuring the safety of both vehicle operators and airport operations.

Obtaining clearance is essential as it ensures that the operator has the necessary permissions to enter and navigate restricted airside areas. Awareness of traffic conditions allows operators to adjust their routes and maintain safety around other vehicles and aircraft. Proper signage helps inform operators of speed limits, hazards, and other important information required for safe navigation of airfield roads. Each of these factors directly influences the safe operation of vehicles on airside roads, making them essential for consideration.