| Title | The Use of Mixed Effects ANCOVA to Characterize Vehicle Emission Profiles |
|---|---|
| Record ID | 10128 |
| Personal Name Creator |
Deaton, Michael L.; Winebrake, James J. |
| Source | JT: Journal of Transportation and Statistics, Vol. 3, No. 2; 16p. in various pagings |
| Publisher | United States. Department of Transportation. Bureau of Transportation Statistics |
| Publication Date | 20000900 |
| Language | English |
| Abstract | A mixed effects analysis of covariance model to characterize mileage dependent emissions profiles for any given group of vehicles having a common model design is used in this paper. These types of evaluations are used by the U.S. Environmental Protection Agency to certify whether or not new models conform to existing emissions standards. The statistical models introduced describe both the average emissions profile for a group of vehicles as well as an accounting for individual vehicle variability within the group. Realistic confidence bounds for an average emissions deterioration profile within a given group can also be provided to allow accurate emissions comparison of multiple groups. Sample of emissions data is presented for two types of vehicles: natural gas Dodge Ram vans and gasoline Dodge Ram vans (all from the 1992-94 model years). Additionally, the population profile for nonmethane hydrocarbons is explored. |
| Rosap ID | dot:4758 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/4758 |
| TRT Terms | Pollutants; Exhaust gases; Statistical analysis; Air quality; Covariance |
| General Subjects | Analysis of covariance; Nonmethane hydrocarbons; Vehicle emissions profiles |
| Classification | NTL - ENERGY AND ENVIRONMENT - Air Quality; NTL - ENERGY AND ENVIRONMENT - Environment Impacts; NTL - REFERENCES AND DIRECTORIES - Statistics |
| Geographical Coverage |
United States |
| ISSN | 10948848 |
| OCLC | 45878172 |
| TRIS Online Accession No |
806255 |
| Availability | BTS Products |
| Resource type | Journal Article |
| URL | https://ntlrepository.blob.core.windows.net/lib/10000/10100/10128/5deaton.pdf |
| Alternative URL | http://www.bts.gov/publications/journal_of_transportation_and_statistics/volume_03_number_02/; http://www.bts.gov/publications/journal_of_transportation_and_statistics/ |
| Format | |
| Database | NTL Digital Repository |