Record Display for the EPA National Library Catalog

RECORD NUMBER: 320 OF 775

OLS Field Name OLS Field Data
Main Title HIGHWAY-ROADWAY. EPA/ORD (Environmental Protection Agency/Office of Research and Development) Air Quality Simulation Model.
Author Petersen, B. ;
CORP Author Environmental Sciences Research Lab., Research Triangle Park, NC. Meteorology and Assessment Div.
Publisher 1 Aug 89
Year Published 1989
Report Number EPA/SW/DK-89/160;
Stock Number PB90-500810
Additional Subjects Models-simulation ; Air pollution ; Mathematical models ; Roads ; Highways ; Concentration(Composition) ; Forecasting ; Turbulent diffusion ; Contaminants ; Vehicles ; Chemical reactions ; Velocity ; Distance ; Software ; Diskettes ; L=Fortran ; H=IBM 3090
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB90-500810 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/10/1990
Collation 1 diskette
Abstract
ROADWAY is a finite-difference model which solves a conservation of species equation to predict pollutant concentrations within two hundred meters of a highway. It uses surface layer similarity theory to predict wind and eddy diffusion profiles from temperature at two heights and wind velocity upwind of the highway. A unique feature of the model is its use of vehicle wake theory. It is assumed that vehicle wakes affect the wind and turbulance fields in a linear manner with wake intensity a function of vehicle speed, downwind distance, and distance from the wake center. HIWAY is a model which computes the hourly concentrations of non-reactive pollutants downwind of roadways. It is applicable for uniform wind conditions and level terrain. Although best suited for at-grade highways, it can also be applied to depressed highways.