Knowledge Center for the Off-Road Diesel Vehicle Regulation

(All documents are provided in Adobe Acrobat (PDF) unless otherwise indicated.)

Overview - Basic Explanation of the Regulation Timeline and Requirements
En Espanol

	Requirements in Effect Now
		Reporting Vehicles		Labeling Vehicles
		5 Minute Idling Limit		For Medium and Large Fleets Written Idling Policy & Recommended Language
		Ban on Adding Tier 0 Vehicles		Requirements when Selling Any Vehicle
	Compliance Requirements - Beginning March 1, 2010
		Large Fleet Requirements - March 1, 2010 Fleets over 5,000 Hp, and state and government fleets. Medium Fleet Requirements - March 1, 2013 Fleets between 2,501 Hp and 5,000 Hp. Small Fleet Requirements - March 1, 2015 Fleets under 2,500 Hp and fleet categories designated as small. Compliance and Requirement Advisories NEW Early Credits including NEW reduced activity / horsepower credits.

Frequently Asked Questions (FAQs)

Applicability
• General Applicability: Determine if your vehicles are exempt due to the personal use, snow removal, job corps, or other exemptions.
• Agricultural Equipment Definition: Equipment used in agricultural operations may have special exemptions in the regulation.
• Electric GSE: Electric GSE may be reported for partial credit towards the emissions requirements.
• Emergency Use Equipment: Equipment used for emergency operations may have some exemptions in the regulation.
• On-road or Off-road: How to determine if your vehicle is considered on-road or off-road.
• 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: How to determine which regulation applies to both engines of two engine cranes.  
• NEW! Two Engine Scrapers:  How the regulation applies to two-engine scrapers
• 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
• NEW! Emission Factors: Explanation of emission factors, fleet averages, and sample calculations.
  
• Engine Model Year: Definition of engine model year and how it can be determined.
  
• NEW! Engine Horsepower: Explanation of maximum horsepower and how it can be determined.
  
• Public Fleet Size: How to determine fleet size for federal, state and local agencies.
• Private Fleet Size: How to determine fleet size for privately owned fleets.  


Requirements and Compliance Questions
• NEW! Fines for Violations: What fines could violators of the off-road regulation face?"
• Installing Unverified Devices: What if I retrofit with a device that's not yet verified?"
• Low-use Vehicles: Limiting vehicles use to 100 hours per year for credit.
• Manufacturer Delays: Learn more about how the regulation provides extensions for fleets waiting on retrofit or engine manufacturers.  
• NEW! Rented and Leased Vehicles: How the regulation applies to rented and leased vehicles.
• NEW! Reporting Requirements Continued: The ongoing reporting requirements of the regulation after fleets complete initial reporting.
• SEP/Showcase Credits: Credits for exhaust retrofits purchased with incentive funding.  
• NEW Subfleets: Reporting and complying as multiple fleets owned by one corporation or agency.  
• NEW!Vehicles Used For Parts: Vehicles used for parts only may be exempt from some regulatory requirements.
• Verified Diesel Emission Control Strategies (VDECS) – Conditional Verification and Deverification: What does conditional verification mean for a fleet, and what should a fleet do if a VDECS is deverified.

On-road Engines and Off-road Vehicles
• Repowers using on-road certified engines in off-road vehicles to lower emissions.
• Clarification Regarding Enforcement of Requirements to Use On-Road Certified Engines in On-Road Registered Vehicles
  Other
  
• Health Benefits of Regulation  
• Compliance Examples



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Outreach Materials

ARB has developed a new poster to help inform fleets of the off-road diesel regulation, which you can download or print by clicking on the links below. Full Size Poster Standard Letter Sized - 8.5" x 11" ARB staff can also mail you a copy of the poster to display. If you are interested in this option, please contact Lauren Chew at lchew@arb.ca.gov or (916) 322-0347.