How often should vehicles typically undergo emissions testing?

Vehicles should typically undergo emissions testing annually or bi-annually, depending on state regulations, because this frequency ensures that vehicles meet the established environmental standards aimed at reducing air pollution. Many state governments implement these regulations to monitor and control vehicle emissions more effectively, as emissions can change over time due to wear and tear or modifications made to the vehicle.

Regular testing helps identify whether a vehicle is still compliant with emission standards, allows for timely repairs if emissions are found to be high, and ultimately contributes to a cleaner environment. Some states may have different testing intervals based on their specific environmental policies, but the emphasis is on consistent and routine checks to reinforce compliance and safety across the vehicle population.