SIMULATION OF VEHICLE EMISSIONS AT INTERSECTIONS

High concentrations of vehicular emissions at road intersections are a health-related issue of concern, and the associated fuel consumption is a matter of continuing economic interest. For this study, a computer simulation model called TEXAS-II was developed at the Center for Transportation Research to estimate with respect to time and location the source of carbon monoxide, hydrocarbon, and oxides of nitrogen emissions and the amount of fuel consumed by vehicles as they pass through an intersection. The model was run approximately 300 times in a series of experiments designed to obtain quantitative estimates of the effects of various traffic and intersection factors on emissions, fuel consumption, traffic delays, and queue lengths. The resulting data were utilized to build predictive models for emissions and fuel consumption at intersections. The factors which were used for simulating the intersection environment were (1) intersection size, (2) presence or absence of a special left-turn lane, (3) pretimed signal control, (4) fully-actuated signal control, (5) all-way stop-sign control, (6) traffic volume, (7) number of left turns, and (8) number of heavy-duty vehicles. Traffic engineers and transportation planners can utilize the results of this study in three ways: the predictive models can be applied to calculate the expected source of emissions, fuel consumption, and traffic performance parameters for any intersection situation that was included in the range of simulated conditions; these values can be looked up in a series of tables; and the TEXAS-II computer simulation program can be run to obtain detailed data concerning any specific intersection environment of practical interest. (FHWA)

  • Record URL:
  • Corporate Authors:

    University of Texas, Austin

    Center for Transportation Research, 3208 Red River Street
    Austin, TX  United States  78705

    Texas State Department of Highways & Public Transportation

    Transportation Planning Division, P.O. Box 5051
    Austin, TX  United States  78763

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Lee, F-P
    • Lee, C E
    • Machemehl, R B
    • Copeland Jr, C R
  • Publication Date: 1983-8

Media Info

  • Pagination: n.p.

Subject/Index Terms

Filing Info

  • Accession Number: 00385777
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/TX-84/17+250-1 Intrm Rpt.
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jun 28 1984 12:00AM