SB 1014 Clean Miles Standard: 2018 Base-year Emissions Inventory Report

Senate Bill 1014 (SB 1014), enacted in 2018, directs the California Air Resources Board (CARB) and the California Public Utilities Commission (CPUC) to develop and implement measures to reduce GHG emissions from transportation network companies (TNC). As a first step, SB 1014 requires CARB to determine the 2018 base year TNC specific CO2 emissions, in units of grams of CO2 per passenger-mile traveled (gCO2/PMT), inventory for the combined TNC industry by January 1, 2020. CARB staff estimates that the 2018 TNC vehicle fleet emitted 301 gCO2/PMT, approximately 50 percent higher than the statewide passenger vehicle fleet average of 203 gCO2/PMT. The analysis also indicates that the industry-wide TNC fleet has a 7 percent lower passenger occupancy than the California statewide passenger vehicle fleet and TNC vehicles operate approximately 61 percent of its vehicle miles traveled with a passenger in the car. Lastly, the TNC fleet is relatively more fuel efficient than the California fleet due to having higher fraction of newer model year vehicles and higher percentage of passenger cars versus light trucks. In addition, the TNC fleet has a larger fraction of high-mileage hybrid vehicles as compared to the average California passenger vehicle fleet. TNCs provide on-demand ride services where rides are arranged online to connect a passenger with drivers using their personal vehicles. In California, vehicles employed by TNCs make up 2.5 percent of the vehicle population, and are growing at a rapid pace. Because TNCs operate differently than traditional transportation modes such as buses, trains, or taxis, the impact on future trends of GHG emissions and VMT on a per passenger mile basis is uncertain. At the present time, GHG emissions from the TNC sector is small compared to the total light duty vehicle sector. Nevertheless, we anticipate growth in VMT attributable to TNCs, which necessitates formulation of immediate policies. The following document provides a detailed description of the results and methods used to calculate the emissions from the TNC fleet.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Tables;
  • Pagination: 46p

Subject/Index Terms

Filing Info

  • Accession Number: 01732473
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS
  • Created Date: Feb 28 2020 5:10PM