Proposed Greenhouse Gas (GHG) Regulations for Medium- and Heavy-Duty Engines and Vehicles, Optional Reduced Emission Standards for Heavy-Duty Engines, and Amendments to the Heavy-Duty Tractor-Trailer GHG Regulation, the Diesel-Fueled Commercial Motor Vehicle Idling Rule, and the Heavy-Duty Hybrid-Electric Vehicles Certification Procedures
Background Materials on Air Emissions and Economic Impacts

This page last reviewed October 22, 2013

The information on this page is provided to support the October 2013 Staff Report: Initial Statement of Reasons for Rulemaking - Proposed Greenhouse Gas (GHG) Regulations for Medium- and Heavy-Duty Engines and Vehicles, Optional Reduced Emission Standards for Heavy-Duty Engines, and Amendments to the Heavy-Duty Tractor-Trailer GHG Regulation, the Diesel-Fueled Commercial Motor Vehicle Idling Rule, and the Heavy-Duty Hybrid-Electric Vehicles Certification Procedures.


AB 1085 Background: On October 11, 2009, AB 1085 was signed into law and became effective on January 1, 2010. The legislation was subsequently amended by SB 855, which was signed into law and became effective on October 19, 2010. The complete amended text reads:

SECTION 1. It is the intent of the Legislature in enacting this act to ensure that the public is provided all of the information relied on by State Air Resources Board staff in proposing the adoption, amendment, or repeal of a regulation, including all information related to, but not limited to, air emissions, public health impacts, and economic impacts. Nothing in this act is intended to supersede the provisions of the California Public Records Act (Chapter 3.5 (commencing with Section 6250) of Division 7 of Title 1 of the Government Code) or the Administrative Procedure Act (Chapter 3.5 (commencing with Section 11340) of Part 1 of Division 3 of Title 2 of the Government Code).

SECTION 2. Section 39601.5 is added to the Health and Safety Code, to read: 39601.5. (a) The state board shall make available to the public all information described in paragraph (2) of subdivision (b) of Section 11346.2 of the Government Code, related to, but not limited to, air emissions, public health impacts, and economic impacts, before the comment period for any regulation proposed for adoption by the state board. (b) In meeting the requirement of subdivision (a), the state board shall not release proprietary, confidential, or otherwise legally protected business information. The state board shall release information in aggregated form, where necessary, to protect proprietary, confidential, or otherwise legally protected business information.


Emissions Data


A .zip file of the emissions data is available here. The read-me file is a directory of the zip files and the individual files accessed through the links below.

GHG Overall Phase 1 Tractor-Trailer GHG rule
  • Tractor Trailer GHG Rule: Access database providing the calculations and estimated reduction for the original TTGHG rule by model year, calendar year and speed.
  • Tractor Trailer GHG Rule - Sunset Tractors: Access database sunsets the tractor requirement for model year 2014 and newer.
  • Excel file showing the estimated activity percentages by haul types used in staff analysis.
  • Excel file providing estimates of cab type splits, and GHG reductions for different claendar year, model year, and haul type combinations.

Emissions Data (continued)


Tractor-Trailer GHG Rule (continued) Optional Low NOx Standards
  • Excel file containing the estimated percentage of engines that meet the optional low NOx engine emission standards and the corresponding NOx emission reduction by model year. Also contains results from the optional NOx emission benefit statewide database in the Emissions Data section.
  • An optional NOx benefit database containing calculations to estimate the potential NOx benefits from optional low NOx engine emission standards.

Diesel Activities

 

The Board is one of five boards, departments, and offices under
the umbrella of the California Environmental Protection Agency.
Cal/EPA | ARB | DPR | DTSC | OEHHA | SWRCB

 

Diesel Activities

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