Knowledge Center for the Off-Road Diesel Vehicle Regulation

Applicability

• Applicability Flow Chart: Determine if your vehicle is covered under the Off-Road Diesel Vehicle Regulation.
• General Applicability: Determine if your vehicles are exempt due to the personal use, snow removal, job corps, or other exemptions.
• Agricultural Equipment: Equipment used in agricultural operations may have special exemptions in the regulation.
• Electric Ground Support Equipment (GSE): Electric GSE may be reported for partial credit towards the emissions requirements.
• Portable Equipment: Self-propelled off-road diesel vehicles that may require registration as portable equipment.
• Rail and Track Equipment: How to determine if your rail or track vehicle is covered by the regulation.
• Two-Engine Cranes and Two-Engine Water-Well Drilling Rigs: How to determine which regulation applies to both engines of two-engine cranes and two-engine water-well drilling rigs.
• Workover Rigs: How to determine if your rig is considered a workover rig in the off-road regulation.
• Yard Trucks: How to determine which regulation applies to your yard truck.

Definitions

• Emission Factors: Explanation of emission factors, fleet averages, and sample calculations.
• Fleet Size - Private Fleets: How to determine fleet size for privately owned fleets.
• Fleet Size - Public Fleets: How to determine fleet size for federal, state and local agencies.
• Horsepower: Explanation of maximum horsepower and how it can be determined.
• Model Year: Explanation of engine model year and how it can be determined.

Requirements and Compliance Questions

• Annual Reporting: Explanation of annual reporting requirements for all fleets.
• Emergency Use: Emergency use vehicles may be exempt from some aspects of the off-road regulation.
• Idling Policy Guidance: Information on what fleets should include in their written idling policies.
• Labeling Vehicles: Requirements for labeling vehicles, including label specifications.
• Low-use Vehicles: Explanation of the low-use provisions, and how fleets may utilize these provisions to reduce compliance requirements.
• Manufacturer Delays: What to do if equipment needed for compliance is delayed.
• Rental/Leased Equipment: How to incorporate rental/leased equipment into the off-road regulation.
• Using Unverified Exhaust Retrofits: What to do if you are using an unverified exhaust retrofit.
• Vehicles Used for Parts: Vehicles used for parts may be exempt from some regulatory requirements.

Diesel Emission Control Systems (DECS)/Retrofit Devices

• DECS/Retrofit Devices: Explanation of what a DECS/Retrofit Device is and how they work.
• Interim Visibility Policy: Explanation of how the interim visibility policy interacts with the off-road requirements

On-road Engines and Off-road Vehicles

• Repowers Using On-road Engines: On-road engines may be used in off-road vehicles to lower emissions.
• Enforcement Advisory 381: Using Certified On-road Engines in On-road Registered Vehicles.

Loan Guarantee/Incentive Programs

• Loan Programs: ARB PLACE Program for off-road vehicles
• Incentive Funding: Explanation of how compliance credits are awarded for vehicles/engines/retrofits funded through incentive programs

The User Guides for DOORS are currently being updated. Once updates on a specific user guide is completed, they will be posted here. Please check back regularly for the user guide you're searching for.

Definitions/Explanations

• Information Required to Complete Initial Reporting
• Air District Codes List
• Engine Family Names

Initial Reporting

• Online Forms for Initial Reporting
• How to Report with Missing Information
• How to Report Subfleets or Multiple Fleets
• How to Report Vehicles with Two (or More) Engines
• Reporting with Repeating Serial Numbers
• View EINs

Update/Edits

• Updating Fleet Information
• Retired or Sold Vehicles
• Reassign Vehicles

Compliance

User guides for this category are coming soon.