California leads the way in emissions regulations for transportation.

California regulators have voted to ban the sale of new diesel big rigs by 2036 and require all trucks to be zero-emissions by 2042, making it the first in the world to require new commercial trucks to be electric. The mandate is estimated to deliver $26.5 billion in public health benefits in California in avoided health impacts and deaths due to diesel pollution. The trucking industry has opposed the regulations, arguing that requirements are costly as electric models are more expensive than diesel trucks.