What is the primary purpose of the two-speed check procedure?

The primary purpose of the two-speed check procedure is to ensure compliance with emission regulations. This procedure is specifically designed to measure the emissions output of a vehicle under different operating conditions. By conducting the test at two different speeds, inspectors can assess whether the vehicle meets the necessary emissions standards set by regulatory agencies. Compliance with these regulations is crucial not only for environmental protection but also for public health by minimizing harmful pollutants from vehicles.

The two-speed check helps identify vehicles that might be excessively polluting, allowing for necessary repairs or adjustments to be made to meet the desired emission levels. This focus on emissions compliance is a central aspect of automotive inspections, reinforcing the importance of environmental regulations.