SIGNAL COORDINATION AS ITS AFFECTS CARBON MONOXIDE CONCENTRATIONS. SESSION 13
As a result of the study, it was found that application of the TRANSYT-7F program, to the already coordinated systems, did not improve traffic flow. However, changing from an actuated to a fixed-time coordinated signal system did improve traffic flow. This change caused the percent of vehicles stopping to decrease 8%. This finding is consistent with other studies that have found a larger improvement when changing from uncoordinated signal systems to a coordinated signal system than when optimizing a coordinated signal system. Another finding of the study had to do with the relationship between vehicle stops and CO concentrations. This relationship indicates that a ten percent reduction in the number of vehicles stopping would result in a five to seven percent reduction in carbon monoxide concentration depending on the total number of vehicles entering the intersection and the wind speed. (Author)
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Supplemental Notes:
- This paper was presented during the Institute of Transportation Engineers 54th Annual Meeting, San Francisco, California, September 23-27, 1984.
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Corporate Authors:
Institute of Transportation Engineers (ITE)
Washington, DC United States -
Authors:
- Schlappi, M L
- Conference:
- Publication Date: 1984
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 5-9
Subject/Index Terms
- TRT Terms: Carbon monoxide; Concentration (Chemistry); Pretimed traffic signal controllers; Traffic actuated controllers; Traffic flow; Traffic signal control systems
- Uncontrolled Terms: Concentration
- Subject Areas: Highways; Operations and Traffic Management; Planning and Forecasting; Vehicles and Equipment; I72: Traffic and Transport Planning;
Filing Info
- Accession Number: 00390614
- Record Type: Publication
- Files: TRIS
- Created Date: Jun 30 1985 12:00AM