Carbon monoxide screen for signalized intersections COSIM, version 3.0 : technical documentation.

Details

• Creators:
  Peters, Scott
• Corporate Creators:
  Illinois Center for Transportation
• Corporate Contributors:
  Illinois. Department of Transportation. Bureau of Materials and Physical Research
• Subject/TRT Terms:
  • Air quality
  • Exhaust gases
  • Air quality management
  • Carbon monoxide
  • Multivariate analysis
  • Air quality management
  • Automobiles
• Publication/ Report Number:
  FHWA-ICT-08-019 ; FHWA-ICT-08-019, UILU-ENG-2008-2006
• Resource Type:
  Tech Report
• Geographical Coverage:
  Illinois
• Corporate Publisher:
  Illinois Center for Transportation
• Abstract:
  The Illinois Department of Transportation (IDOT) currently uses the computer screening model Illinois ; CO Screen for Intersection Modeling (COSIM) to estimate worst-case CO concentrations for proposed roadway ; projects affecting signalized intersections. The original model was developed as part of the Illinois ; Transportation Research Center (ITRC) research project IIIA-H1, FY 97, completed in October 1999. Modeled ; results from Version 1.0 and 1.1 of COSIM are based on the U.S. Environmental Protection Agency’s (USEPA) ; mobile source emission model, MOBILE5b, and roadway dispersion model, CAL3QHC v 2.0 (Larson, 1999). ; The second version of COSIM was released in 2003. Version 2.0 incorporated new emission factor (EF) tables ; developed using USEPA’s updated version of the MOBILE model called MOBILE6. In addition to updating the ; emission factors used in COSIM, pre-screen criteria for determining when COSIM needs to be used for a ; roadway project were developed and incorporated into COSIM as a Pre-Screen feature (Larson, 2003). In ; 2007, regulatory changes in the Illinois vehicle Inspection and Maintenance (I&M) program prompted the Illinois ; Environmental Protection Agency (IEPA) to recommend that IDOT update COSIM with new EF tables using the ; MOBILE6.2 model. Based on this recommendation, IDOT and the Illinois Center for Transportation (ICT) ; provided funding to update the COSIM model. As part of the update, IDOT also requested that the methodology ; used in creating the original Pre-Screen criteria be reevaluated and possibly revised based on the findings of the ; evaluation. This report provides technical documentation on the updates and revisions made to Version 3.0 of ; COSIM finalized in June 2008.
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• Format:
  PDF
• Funding:
  R27-7
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/16696/dot_16696_DS1.pdf
• File Type:
  [PDF - 185.42 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:2686adfd1977ac885804172b2df64496a234edbeff512d6772d35e29dbdda6d1