COSCREEN98 user`s manual for the FDOT intersection air quality (CO) screening model
As with the original FDOT carbon monoxide (CO) screening test -- COSCREEN -- this new version, COSCREEN98, attempts to screen major intersections by using a hypothetical four-legged intersection. The original COSCREEN is based on CALINE3 analysis of an intersection for a specific set of temperatures. COSCREEN98 requires only a few more input data than the original COSCREEN, but is much more accurate about predicted CO concentrations near the intersection. The user inputs the region, the environment, the traffic volume, the approach speed, the year, and up to ten real receptors. This model then uses MOBILE5a and CAL3QHC2 to evaluate the intersection. CAL3QHC2 is the model accepted by the US Environmental Protection Agency (EPA) for dispersion modeling at intersections. Using MOBILE5a, emission factors are automatically developed for each analysis based on the location of the project, year, and speed. The location of the project impacts the temperatures and MOBILE5a options, which are automatically set by COSCREEN98. The selected environment (urban, suburban or rural) impacts the surface roughness value and the background CO concentrations. The addition of the suburban option provides the user with additional flexibility. The one-hour and eight-hour CO concentrations (including background concentrations) are calculated at each specified receptor.
- Research Organization:
- University of Central Florida, Dept. of Civil and Environmental Engineering, Orlando, FL (United States); Florida State Dept. of Transportation, Environmental Management Office, Tallahassee, FL (United States)
- OSTI ID:
- 678993
- Report Number(s):
- PB-99-165060/XAB; FL-ER-71B-99; TRN: 92431769
- Resource Relation:
- Other Information: DN: See also PB95-500138 and PB96-146071.; PBD: Mar 1999
- Country of Publication:
- United States
- Language:
- English
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