Definitions for "AT-PZEV"
Keywords:  pzev, zev, hybrid, emission, zero
Short for Advanced Technology Partial Zero Emission Vehicles. Vehicles that meet California Air Resources Board's requirements for SULEV exhaust emissions, zero fuel evaporative emissions, 150,000-mile emissions durability and an extended emission systems warranty, are referred to as AT-PZEVs. Hybrid Car Glossary - B
Advanced Technology: Partial Zero Emission Vehicle
Acronym for "Advanced Technology Partial Zero Emissions Vehicles" which is currently the EPA's cleanest rating attainable in a vehicle which uses an internal combustion engine. AT PZEVs meet the PZEV requirements and have additional "ZEV-like" characteristics. A dedicated compressed natural gas vehicle, or a hybrid vehicle with engine emissions that meet the PZEV standards would be an AT PZEV.