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Variations In Predicted Employment-related Tripmaking Caused By Alternate Systems Of Job Classification

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  • English
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    • Creators:
      Limoges, Edward
    • Subject/TRT Terms:
    • Resource Type:
      Proceedings
    • Geographical Coverage:
      Michigan
    • Abstract:
      The purposes of this paper are to describe how the locational patterns of jobs, and the arrival time of home-to-work trips, vary according to the system used to classify jobs. SEMCOG has obtained a special cross-tabulation of 1990 census data on workers by traffic analysis zone of work. We have developed a method that uses industrial class and occupational class in conjunction to assign land use classes to the workers. This allows the linking of the workplace?s land use class to the worker?s commuting trip characteristics (time of departure, trip duration, means of transportation) that are contained in the census cross-tabulation. The paper contrasts two systems of classifying kind of work or kind of job activity. One of these systems is industrial class, which relates to the overall purpose of the business, agency, or governmental department. Examples of general industrial classes are manufacturing, retail trade and services. The other system is land use class, by which is meant the nature and characteristics of the activities, and usually the buildings and associated open lands that the activities occupy. The paper uses five general nonresidential land use classes: office, commercial, institutional, industrial, and transportation, communications, and utilities, or TCU. To illustrate, an industrial class system would put the label retail trade on all the establishments and workers of the Kmart Corporation, whereas with a land use class system the headquarters would be called office, the stores commercial, and the warehouses industrial. 7p.
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