THE DISTRIBUTION OF HOUSEHOLD INCOME IN TRIP GENERATION

In transportation modelling it has been widely assumed that household income is well fitted by a gamma distribution, and this distribution has been adopted for almost all category analysis trip generation models. This paper presents results from several surveys and demonstrates that in recent years the fits obtained using the gamma distribution have deteriorated. It is shown that a better representation can be achieved by fitting separate gamma distributions for (I) households with one or more working members and (II) households with no workers. The stability of the distribution parameters over time is analysed using the department of employment's family expenditure surveys between 1965 and 1973. The paper discusses the implications of the findings for trip generation models. (A). /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00410683
• Corporate Authors:

  Printerhall Limited

  29 Newmart Street
  London W1P 3PE,   England 
• Authors:
  • MacKinder, I H
  • Evans, S E
  • May, R
• Publication Date: 1975-12

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 4 p.
• Serial:
  • Traffic Engineering & Control
  • Volume: 16
  • Issue Number: 12
  • Publisher: Hemming Group, Limited
  • ISSN: 0041-0683
  • Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

• TRT Terms: Costs; Expenditures; Households; Income; Interviewing; Jobs; Mathematical analysis; Mathematical models; Physical distribution; Statistical distributions; Surveys; Transportation; Travel; Trip generation
• Uncontrolled Terms: Models; Parameters
• Geographic Terms: United Kingdom
• ITRD Terms: 6471: Analysis (math); 224: Cost; 6572: Distribution (stat); 309: Household; 256: Income; 9147: Interview; 698: Journey; 6205: Model (not math); 2271: Occupation; 8119: United Kingdom
• Subject Areas: Operations and Traffic Management; Planning and Forecasting; Transportation (General); I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00138946
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Nov 17 1976 12:00AM