Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Determination of percentages of vehicles operating in the cold start mode / prepared for Environmental Protection Agency, Office of Air and Waste Management, Office of Air Quality Planning and Standards.
Author Midurski, Theodore P. ; Castaline, Alan H.
Other Authors
Author Title of a Work
Castaline, Alan H.
CORP Author GCA Corp., Bedford, MA. GCA Technology Div.;Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
Publisher Office of Air Quality Planning and Standards ; National Technical Information Service [distributor],
Year Published 1977
Report Number EPA-450/3-77-023; GCA-TR-77-19-G; EPA-68-02-1376
Stock Number PB-288 860
OCLC Number 08265435
Subjects Automobiles--Cold weather operation. ; Automobiles--Motors--Exhaust gas.
Additional Subjects Air pollution ; Exhaust emissions ; Hydrocarbons ; Carbon monoxide ; Data analysis ; Tests ; Sites ; Concentration(Composition) ; Light duty vehicles ; Cold mode operation ; Air fuel ratio ; Federal test procedure
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 450-3-77-023 Headquarters Library/Washington,DC 05/20/2013
EKBD  EPA-450/3-77-023 Research Triangle Park Library/RTP, NC 09/10/1999
ESAD  EPA 450-3-77-023 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-288 860 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation xiii, 99 p. : ill. ; 28 cm.
Estimates of the percentages of vehicles operating in less than the stabilized condition (i.e., cold mode) have been made for 60 locations in the Pittsburgh and Providence regions. These estimates were derived using detailed regional travel data for both regions. Accurate knowledge of the percentages of vehicles operating in the cold mode at a particular study location is a key factor in estimating carbon monoxide emissions. That carbon monoxide emission rates are severely affected by operation in the prestabilized condition has been well documented through numerous laboratory studies. While these laboratory studies have served to characterize carbon monoxide emissions from cold operating vehicles with respect to variables such as ambient temperatures and cold soak duration, the study being reported here examines specific traffic streams to identify the actual percentages of vehicles that are operating in the cold mode. Cold start percentages are presented for the morning commuter hours, the mid-day period, the evening commuter hours, and the evening and early morning off-peak period for each of the 60 traffic streams analyzed. Results indicate that the percentage of cold operating vehicles is highly variable both among locations within an urban area, and during different time periods at any specific location. It is also indicated that the actual percentages of vehicles operating in the cold mode may be somewhat different from the percentages assumed in the Federal Test Procedure.
"GCA Corporation, GCA Technology Division." "August 1977." Includes bibliographical references. "Contract no. 68-02-1376, task order 29." "EPA-450/3-77-023."