Search Frequent Questions

Displaying 1 - 15 of 21 results

• Why Doesn't my Output Vehicle Miles Traveled (VMT) Match my Input VMT?

  See More Frequent Questions about MOVES and Related Models . This problem usually occurs when the run specification does not include all possible vehicle and fuel types. MOVES internally allocates the input VMT to each of the source types and fuel types and only reports the VMT for the fuel…

  • Last published: July 10, 2024

• What does MOVES Assume for Future Year Fleet Fuel Efficiency and Emissions?

  See More Frequent Questions about MOVES and Related Models . MOVES reflects all fuel economy and emissions standards that were final as of the model release date. For a list of recent regulations accounted for in the most recent MOVES version, see the see the Overview of EPA’s Motor Vehicle…

  • Last published: October 23, 2024

• Are the NO Values in the MOVES Output Files Actually NO (Molecular Weight 30), or is the NO Expressed as NO2 (Molecular Weight 46)?

  See More Frequent Questions about MOVES and Related Models . The NO values in all versions of MOVES2014 (and MOVES2010b) output files are expressed as NO2 (molecular weight 46). HONO and NOx are also expressed in terms of NO2.

  • Last published: July 10, 2024

• What are the recordkeeping requirements for a renewable fuel producer that uses used cooking oils and fats as feedstocks for renewable fuel?

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Renewable fuel producers using used cooking oils or animal wastes as feedstocks are required under 40 CFR 80.1454(d)(3) to obtain from their feedstock supplier, and maintain in their records, documents which certify that the feedstock meets the definition…

  • Last published: August 2, 2024

• How does MOVES Calculate CO2 and CO2 Equivalent Emissions?

  See More Frequent Questions about MOVES and Related Models . MOVES calculates the energy it takes to operate an onroad vehicle based on energy consumption rates as explained in the technical reports Greenhouse Gas and Energy Consumption Rates for Onroad Vehicles MOVES3 (pdf) (November 2020, EPA-420-R-20-015) and Exhaust Emission Rates…

  • Last published: March 20, 2024

• What is the Difference Between Extended Idling and Normal Idling? Is it Possible to get Distinct Idling Emission Output for any Vehicle Type? Can this be Done in the Emission Rate Mode, or only Inventory Mode?

  See More Frequent Questions about MOVES and Related Models . Extended idling is a distinct emission process defined as the overnight idling of long-haul trucks with sleeper cabs at truck stops and other locations during federally required downtime. During such idling periods, these engines experience unusual loads (televisions, air conditioning…

  • Last published: July 10, 2024

• How does MOVES Classify Light-Duty Trucks?

  See More Frequent Questions about MOVES and Related Models . There are two definitions used in MOVES for light duty trucks. The source use type light duty trucks (sourceTypeID values of 31 or 32) use the Federal Highway Administration (FHWA) VM-1 definition of light duty vehicles used to report vehicle…

  • Last published: July 10, 2024

• Why Are There No Emissions for the Early and Late Hours of the Day for Certain Source Types?

  See More Frequent Questions about MOVES and Related Models . MOVES has no start emissions for the certain source types in certain hours of the day. While we know that a non-zero number of these source types do start late at night, our activity data on these trucks and buses…

  • Last published: July 10, 2024

• How does the "active management" requirement in the definition of renewable biomass apply to land that changes status in the future?

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . In RFS2, EPA has interpreted the EISA requirement that existing agricultural land be "cleared or cultivated at any time prior to [December 19, 2007] and actively managed or fallow and nonforested" to apply to land that existed as…

  • Last published: August 2, 2024

• What materials from non-federal forestlands meet the definition of renewable biomass in RFS?

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Slash and pre-commercial thinnings from non-federal forestland that is not ecologically sensitive forestland qualify as renewable biomass for purposes of RFS. Slash is defined in 40 CFR 80.1401 as the residue, including treetops, branches and bark, left on…

  • Last published: February 23, 2024

• What is the Relationship Between Calendar Year, Model Year, and Age?

  See More Frequent Questions about MOVES and Related Models . Model year (modelYearID) corresponds to the year that a group of vehicles in the fleet was produced. Calendar year (yearID) is the analysis year as selected in the ‘Time Spans/Year’ panel of the MOVES GUI. For a given calendar year…

  • Last published: July 10, 2024

• Does a renewable fuel producer have to report and maintain records on the feedstocks for every batch of renewable fuel they produce?

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . All renewable fuel producers must report and maintain records concerning the type and amount of feedstocks used for each batch of renewable fuel produced (see 80.1451(b)(1)(ii)(K) and 80.1454(b)(3)(vi)). With regard to the renewable biomass recordkeeping and reporting requirements…

  • Last published: August 2, 2024

• How does a renewable fuel producer document that the MSW feedstock that they are using to produce cellulosic ethanol meets the definition of separated MSW as defined in Section 80.1426(f)(5)(i)(C )? How does the producer quantify the portion of the final

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . The renewable fuel producer using separated MSW feedstock to produce renewable fuels such as cellulosic ethanol, cellulosic diesel, cellulosic naphtha, etc. must document that their feedstock meets the definition of separated municipal solid waste (MSW), which is "material…

  • Last published: August 2, 2024

• How does the "active management" requirement in the definition of renewable biomass apply to land that changes status in the future?

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . In RFS2, EPA has interpreted the EISA requirement that existing agricultural land be "cleared or cultivated at any time prior to [December 19, 2007] and actively managed or fallow and nonforested" to apply to land that existed as…

  • Last published: August 2, 2024

• Are palm oil plantations considered agricultural land or tree plantations under RFS2?

  See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Palm oil trees are planted and managed for the purpose of harvesting palm fruit and not for harvesting the trees themselves, in the same way that a fruit orchard is planted and managed to yield fruit and not…

  • Last published: August 6, 2024