Fuel Economy Standards on Heavy Duty Vehicles

Country / jurisdiction: Japan · Year: 2019 · Status: In force · Level: National · Type: Voluntary

The regulation sets fuel economy standards for diesel trucks with a gross vehicle weight (GVW) >= 3.5 t, all diesel tractor trucks, diesel transit buses with GVW >= 6 t and diesel highway buses with GVW >= 3.5t.

Japanese regulators tightened Phase 1 standards by raising the fuel economy targets. When the Phase 2 targets are fully met, the fleet average fuel economy is estimated to be:

For trucks, 7.63 km/L, a 13.4% improvement over the 2015 baseline at 6.72 km/L

For buses, 6.52 km/L, a 14.3% improvement over the 2015 baseline at 5.71 km/L

Official source: https://www.mlit.go.jp/common/001212395.pdf