摘要: |
Household travel surveys from three regions of Florida (Jacksonville, Tampa, and Miami areas) were examined to understand patterns in travel behavior. Tours were constructed and characterized in terms of purpose, travel party composition, complexity, and flexibility. The empirical findings underscore the need for travel-demand models that incorporate trip-chaining and intra-household interactions. A framework for modeling tour generation was also developed. This comprises a suite of four models applied sequentially. These models were estimated for each of the three regions (a total of 12 multinomial logit models in all). This study also examined the transferability of tour-generation models among three metropolitan regions in Florida. Naive transfer methods are examined to assess the performance of thetransferred models (from two other regions) to that of the locally-estimated model. Transferability is evaluated using multiple measures such as aggregate- and disaggregate predictive ability and the aggregate elasticities to specific socio-economic factors. Overall, while it might be acceptable to use a similar modeling framework, caution must be exercised in borrowing parameters from one area for use in another region. The current study can be significantly extended using the recent Florida add-on samples to the NHTS to guide the efforts to build a standardized activity-based modeling system for Florida. |