Record Display for the EPA National Library Catalog


Main Title Impacts of Transportation Control Strategies on Los Angeles Air Quality.
Author Martine, J. R. ; Nordsiec, R. A. ; Eschenroede, A. Q. ;
CORP Author General Research Corp., Santa Barbara, Calif.
Year Published 1973
Report Number GRC-CR-4-273; EPA-68-02-0336; R4-73-013-Vol-d;
Stock Number PB-221 301
Additional Subjects ( Air pollution ; Exhaust gases) ; ( Highway transportation ; Air pollution) ; Atmospheric diffusion ; Strategies ; Photochemical reactions ; Trajectories ; Nitrogen oxides ; Ozone ; Hydrocarbons ; Effectiveness ; California ; Los Angeles(California) ; Air pollution abatement ; Air pollution forecasts
Library Call Number Additional Info Location Last
NTIS  PB-221 301 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 66p
A photochemical/diffusion simulation model is employed to evaluate four control strategies for reducing air pollution in Los Angeles. Three previously tested, representative air trajectories serve as baseline cases using 1969 emission levels. Transportation controls are emulated by reducing source emissions in accordance with hypothetical plans worked out with the Division of Meteorology of the Environmental Protection Agency. Straight reductions of vehicle miles traveled do not give ozone reduction percentages that are as large as the emission reduction percentages. Strong influence of initial pollutant load of the air in the morning is noted. Day-to-day pollution carryover must be carefully adjusted through the initial conditions to account for continous strategies in contrast with intermittent strategies. Ratios of nitrogen oxides to reactive hydrocarbon affect the ozone buildup markedly. It is found that control of the mixture ratio can be more important than straight reduction in emissions. (Author)