||MOBILE4 sensitivity analysis : final report /
Smith, Mark G. ;
Smith, M. G. ;
Wilson, T. T.
||Alliance Technologies Corp., Chapel Hill, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
|| U.S. Environmental Protection Agency, Office of Research and Development,
||EPA/600/8-91/032; PB91-191312; EPA-68-D9-0173
Automobiles--Motors--Exhaust gas--Mathematical models. ;
Air--Pollution--Mathematical models. ;
MOBILE4 (Computer program)
Mathematical models ;
Highway transportation ;
Carbon monoxide ;
Emission factors ;
Vehicular traffic ;
Air pollution ;
Air pollution control ;
MOBILE4 model ;
||NVFEL Library/Ann Arbor, MI
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||46 p. in various pagings : charts ; 28 cm.
The report identifies the MOBILE4 input variables that can have significant impacts on highway vehicle emissions inventories and gives priorities for the development of improved guidance for specifying MOBILE4 inputs. Two major factors are considered: (1) the likelihood and potential range of variability in values for each MOBILE4 input; and (2) the potential magnitude of the effect of these variations, in terms of impact on typical mobile source inventories. The analysis updates previous work based on MOBILE3 by using MOBILE4 for the sensitivity analysis and by adding new MOBILE4 variables. The approach used in previous work is modified to address the specific concerns of the project--the State Implementation Plan (SIP) and National Emissions Data System (NEDS) inventory/guidance context. An additional level of detail is included for two critical variables (speed and temperature). Sensitivity to basic vehicle inspection/maintenance program specifications (waiver and compliance rate) is also considered. The primary sensitivity analysis is structured around two base cases representing ozone and carbon monoxide (C) season conditions. The report describes: (1) MOBILE4 input variable values for the ozone and CO base cases, (2) the variables and ranges or alternate values applied in the sensitivity analysis, (3) sensitivity analysis results, and (4) conclusions.
Cover title. Performing organization: Alliance Technologies Corporation. Includes bibliographical references (p. 15). "EPA-600/8-91-032." "April 1991." "EPA Contract No. 68-D9-0173, Work Assignment No. 0/109 and 1/106"--T.p. "Project Officer: Carl T. Ripberger"--T.p. Photocopy.