Enhancing Internal Trip Capture Estimation for Mixed-Use Developments (2011) / Chapter Skim
Currently Skimming:
Summary
Summary
Pages 1-6
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 1... ...
Specifically, the project developed • A classification system of MXDs that identifies site characteristics, features, and context likely to influence trips subject to internal capture; • A defensible improved methodology for estimating internal trip capture with reasonable accuracy; • A data-collection framework and methodology to quantify the magnitude of travel associated with MXDs to determine appropriate reductions below single-use trip generation estimates; and • A spreadsheet estimation tool to facilitate computations (available at http://www.trb.org/ Main/Blurbs/165014.aspx)
|
From page 2... ...
Shared parking reductions apply only to parking accumulations in a parking facility serving multiple uses; the percentage reduction applies only to parking accumulation, not trip generation. Intrazonal trips apply to complete traffic analysis zones used in regional travel forecast models.
|
From page 3... ...
The recommended estimation method was validated by testing it against actual data from several MXDs. The recommended method was found to be more accurate for estimating external vehicle trips for MXDs than either the existing ITE method or unadjusted ITE trip generation rates and equations.
|
From page 4... ...
. The researchers believe that the limited validations conducted for the proposed estimation method confirm that the results provide accurate approximations of external trip generation for typical MXDs consisting of office, retail, restaurant, residential, cinema, and hotel land uses, consistent with the accuracy of trip generation estimates for single-use developments as portrayed in such references as the 8th edition of Trip Generation (2)
|
From page 5... ...
For example, it cannot be concluded that the methodology will be appropriate for MXDs that differ significantly from those surveyed in this project in terms of • Regional context, including competing opportunities outside the development; • Access and parking; • Scale of the development; • Complementary land uses, including specific pairs of business types; • Specific residence types, • Other component characteristics within each land use category; • Proximity and connectivity between each pair of land uses, especially the layout of the land uses relative to each other; • Other characteristics such as proximity to transit and pedestrian access within and around the site; and • Colder locations that might limit or constrain pedestrian traffic. Suggested Future Research Clearly, this project has made progress in estimation of internal capture; however, the database is still sparse and much that is thought to be logical about MXD travel characteristics is 5
|
From page 6... ...
• Appendix E: Florida Survey Questionnaires presents the samples of questionnaires used for three Florida internal capture surveys that produced some data used in this project. • Appendix F: Validation of Estimation Procedure documents a test of seven MXDs for which recommended estimation methodology was tested for its ability to reproduce cordon external vehicle trip volumes.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.