For a Category Five test, how should safeties be operated?

In a Category Five test, it is essential to ensure that the safeties are tested under conditions that closely reflect real operational scenarios. Operating the safeties manually with the car running at rated load and speed allows for an accurate assessment of their performance under normal operational conditions. This testing method verifies that the safeties will react appropriately during an actual emergency situation when the car is experiencing the weight it is designed to carry and is functioning at its intended speed.

Conducting the test without a load or while the car is running empty would not provide reliable data on how the safeties would function under typical conditions, thus failing to ensure their effectiveness in a real-world scenario. Testing at the highest speed would also not simulate the rated load condition properly and could lead to unsafe testing practices. Therefore, the chosen method effectively simulates true operational stress, ensuring that safety features are functioning correctly when needed.