CARB Advanced Clean flotas Rule Takes Effect, Mandating cero emisiones Truck Purchases

CARB Advanced Clean flotas Enforcement Begins

The California Air Resources Board (CARB) has begun enforcement of the Advanced Clean flotas (ACF) regulation, the most aggressive cero emisiones vehicle mandate for commercial trucks in the world. The regulation requires large flotas operating in California to begin transitioning to cero emisiones vehicles (ZEVs).

Compliance Requirements

Under the ACF rule, flotas operating 50 or more trucks in California must ensure that a minimum percentage of new truck purchases are ZEVs. For 2026, the requirement is 10% for drayage flotas and 5% for other large flotas. The percentages increase annually, reaching 30% by 2028 and 50% by 2030 for most flota categories.

Infrastructure Challenges

flota operators report that charging and refueling infrastructure remains the primary barrier to compliance. Installing DC fast charging at flota terminals requires significant electrical infrastructure upgrades, with costs ranging from $500,000 to $2 million per facility depending on the number of chargers and required utility service upgrades. Lead times for utility interconnection can exceed 18 months.

Exemptions and Flexibility

CARB has built several flexibility mechanisms into the rule. flotas that can demonstrate ZEV unavailability for specific applications or that face infrastructure delays can apply for exemptions. A credit banking system allows flotas to earn credits for early ZEV purchases that can be used in later compliance years.