What type of vehicles typically undergo more rigorous emissions testing?

The type of vehicles that typically undergo more rigorous emissions testing are older vehicles. This is because older vehicles are more likely to be equipped with outdated emissions control technology and may not meet the current environmental standards designed to reduce air pollution. Emissions testing for these vehicles is stricter to ensure they are operating efficiently and within the required emissions limits.

Regulatory bodies recognize that older vehicles might have higher emissions due to wear and tear, and thus they are often subjected to more comprehensive evaluations to identify any emissions-related issues. This approach allows for necessary repairs or modifications to be made, which ultimately helps in reducing pollutants released into the atmosphere.

In contrast, commercial vehicles often have specific standards and are typically maintained more rigorously to comply with industry regulations, which could lead to less frequent emissions testing in some jurisdictions. Electric vehicles are designed to have no tailpipe emissions, so they generally do not undergo traditional emissions testing. Newly purchased vehicles usually comply with the latest emissions standards right out of the factory and therefore do not require rigorous testing at the same level as older models.