What is the benefit of performing emissions checks at different speeds?

Performing emissions checks at different speeds is beneficial because it allows for a comprehensive view of vehicle emissions. Emissions can vary significantly based on the speed at which a vehicle is operated. Different operating conditions can cause different components of the emissions control system to activate or perform differently. By testing at varying speeds, inspectors can capture a more accurate representation of how a vehicle is functioning under real-world conditions, thereby identifying any potential issues that may not be evident during a single-speed test. This thorough approach ensures that vehicles meet emissions standards more effectively, contributing to better air quality and environmental protection.