Advanced Clean Fleets Regulation - ZEV Milestones Option
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How does the ZEV Milestones Option work?
Fleet owners may opt-in to the ZEV Milestones Option when reporting in the Truck Regulations Upload and Compliance Reporting System. This option gives fleet owners the flexibility to phase-in ZEVs as a percentage of the fleet of vehicles with a gross vehicle weight rating (GVWR) greater than 8500 lbs. and light-duty package delivery vehicles based on the vehicle fleet composition. Milestone targets are phased-in by vehicle group in a manner that provides more time for specialized vehicles. Near-zero emission vehicles (NZEVs) until the 2035 model year count the same as ZEVs.
What are the ZEV Milestones Option targets?
The ZEV Milestones Option targets are determined for the California fleet starting on January 1 for key milestone years as shown in Table A. The number of ZEVs calculated for each group is determined by multiplying the ZEV percentage by the number of vehicles in each group. The annual ZEV Fleet Milestone target for the fleet is the sum of ZEVs calculated for each group each year and compliance is achieved when the number of ZEVs in the California fleet meets or exceeds the total ZEV target for the fleet.
Table A: ZEV Fleet Milestones by Vehicle Group and Year
Percentage of vehicles that must be ZEVs | 10% | 25% | 50% | 75% | 100% |
Group 1: Box trucks, vans, buses with two axles, yard tractors, light-duty package delivery vehicles | 2025 | 2028 | 2031 | 2033 | 2035 and beyond |
Group 2: Work trucks, day cab tractors, pickup trucks, buses with three axles | 2027 | 2030 | 2033 | 2036 | 2039 and beyond |
Group 3: Sleeper cab tractors and specialty vehicles | 2030 | 2033 | 2036 | 2039 | 2042 and beyond |
How is the ZEV milestones target calculated each year?
The following shows an example of the ZEV Milestones target calculation for a fleet with 100 vehicles with a GVWR greater than 8500 lbs. distributed across the three vehicle groups. The percentages in this example are for the 2030 calendar year. The sum for all groups is 22 ZEVs needed to comply starting January 1, 2030. The 22 ZEVs can be from a single group or any combination of groups.
- Group 1: 60 vehicles x 25% = 15 ZEVs
- Group 2: 20 vehicles x 25% = 5 ZEVs
- Group 3: 20 vehicles x 10% = 2 ZEVs
- Total ZEV Milestones Target = 22 ZEVs.
How are the ZEV milestones targets calculated for multiple years?
The calculation method for each year is the same as the prior example except that the ZEV percentages in each group increase over time. The next example shows the results for the same 100 truck fleet for selected years assuming the number of vehicles in each group remains the same in all years. The ZEV Milestones target is shown on the bottom row of the table and can be met with ZEVs (and NZEVs) of any configuration (e.g. pickups, yard trucks, dump trucks, tractors, and in any combination of ZEVs or NZEVs).
Table B: ZEV Fleet Milestones Targets for Multiple Years
Number of Vehicles by Group | ZEVs in 2025 | ZEVs in 2027 | ZEVs in 2029 | ZEVs in 2033 |
Group 1 = 60 | 60*10%=6 | 60*10%=6 | 60*25%=15 | 60*75%=45 |
Group 2 = 20 | 20*0%=0 | 20*10%=2 | 20*10%=2 | 20*50%=10 |
Group 3 = 20 | 20*0%=0 | 20*0%=0 | 20*0%=0 | 20*25%=5 |
ZEV Milestones Target | 6 | 8 | 17 | 60 |
Can I count passenger cars towards my ZEV milestones target?
No, the regulation does not apply to light-duty vehicles with a GVWR below 8,501 lbs. except for light-duty passenger vehicles. Therefore, light-duty ZEVs and NZEVs do not count towards compliance with the Advanced Clean Fleets regulation unless they are light-duty package delivery vehicles.
This document is provided to assist regulated entities in complying with the Advanced Clean Fleets regulation. In the event any discrepancy exists between this document and the Advanced Clean Fleets regulation, the regulatory text of the Advanced Clean Fleets regulation applies.