U.S. Environmental Protection Agency Announces Major Rollback of Heavy-Duty Truck Emission Regulations

*This content was translated by AI.

The U.S. Environmental Protection Agency (EPA) announced a major revision to significantly relax strict emission regulations on heavy-duty trucks and diesel equipment that were implemented during the Biden administration. The agency stated that the move aims to alleviate economic burdens on truck drivers, farmers, and small and medium-sized enterprises (SMEs) who have been pressured by overly stringent and unrealistic rules, while also boosting logistics productivity. The EPA estimates that if the revised rule is finalized, the U.S. trucking industry could save a total of $12 billion (approximately 16.5 trillion won according to Hanwha).

The core of this revision involves shortening the warranty period requirements for emission systems and abolishing the vehicle derating system. The EPA has decided to fully reduce the mandatory free-warranty period for emission control components, which have been identified as the primary driver of rising truck manufacturing costs, thereby lowering per-vehicle expenses by up to $6,000 at the time of new vehicle purchase. Additionally, existing regulations that forced vehicles to be speed-limited to 5 mph in the event of a malfunction or error in diesel emission reduction devices (DEF/urea systems) will be completely abolished. Going forward, even if system errors occur during driving, drivers will be able to safely reach repair facilities with only visual and auditory warnings, without the risk of accidents caused by sudden speed reductions.

However, considering criticism regarding environmental regression, the EPA has decided to preserve the basic framework by maintaining the core standard for reducing nitrogen oxides (NOx), a key pollutant, at 90% of the level planned under the previous Biden administration. The agency stated its intention to provide flexibility so that manufacturers can meet standards within a reasonable timeframe without rushing products to market.

This regulatory relaxation is expected to have significant ripple effects not only on the U.S. heavy-duty truck market but also across the entire related supply chain. While industry observers anticipate renewed activity in the distribution of large diesel vehicles and key components that had been slowed by excessive environmental regulations, environmental groups and civil society are expected to strongly oppose the move during the 45th-day public hearings and deliberation process, citing concerns over deteriorating air quality and weakened momentum in addressing climate change.

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*This content was translated by AI.