THE EVALUATION OF TRANSPORTATION MODEL RANDOM ERROR IN SOCIAL AND ENVIRONMENTAL INDICES

Transportation simulation models can be used to calculate social and environmental indices of transportation system performance. The outputs of the simulation models are subject to random error, and this error is transmitted to these indices. Random error is a consequence of inaccuracies in calibration and input data, and simplified model theory. The error in the indices can often be estimated prior to model execution, thus allowing the analyst to determine whether the complexity of the model is appropriate for his particular needs. Examples of how noise pollution, air pollution, vehicle-miles-travelled, and vehicle-hours-travelled indices are affected by changing the zone size of an assignment model illustrate how knowledge of index error may be used to design a transportation simulation. /Author/TRRL/

• Corporate Authors:

  Pion Limited

  207 Brondesburg Park
  London NW2 5JN,   England 
• Authors:
  • Horowitz, A J
• Publication Date: 1977

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 385-394
• Serial:
  • Environment and Planning
  • Volume: 9
  • Issue Number: 4
  • Publisher: Pion Limited

Subject/Index Terms

• TRT Terms: Air pollution; Calibration; Coefficients; Data files; Economic efficiency; Environment; Error analysis; Errors; Mathematical models; Noise; Simulation; Social factors; Sociology; Sound; Traffic assignment; Transportation; Vehicle miles of travel
• Uncontrolled Terms: Efficiency; Index (Coefficient); Input data; Transportation models; Zone
• Old TRIS Terms: Random error
• ITRD Terms: 6171: Calibration; 1394: Catalytic converter; 6410: Coefficient; 5911: Efficiency; 2455: Environment; 6440: Error; 8634: Input data; 6473: Mathematical model; 1054: Network (traffic); 2253: Sociology; 6748: Sound; 679: Traffic assignment; 292: Vehicle mile
• Subject Areas: Operations and Traffic Management; Planning and Forecasting; Society; Transportation (General); I71: Traffic Theory; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00163186
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: May 18 1978 12:00AM