Task 9 Commercial Vehicle Model Design and Development

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Preliminary transport model design tasks: model specifications, travel, person and household segmentation, data collection, travel surveys, model estimation

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The sequence of tasks is:
  1. Develop commercial vehicle model specification
  2. Develop current year trip matrices
  3. Specify trip matrix growth factors
The approach to commercial vehicle modelling taken in Auckland was similar, except that instead of using a prior trip matrix derived from the earlier model, which was unreliable, the prior trip matrix was developed by fitting a gravity model to the synthesised trip ends and the average commercial vehicle trip length observed in a vehicle operator survey. This prior trip matrix was then estimated against observed CV counts.