We received our copy of ITE's report Trip Generation, 9th Edition. One of my earliest posts described trip generation and the report. I did a follow-up post about the 8th Edition and we put out a spreadsheet with a bunch of the data, which was very popular but ITE asked us to remove it.
The 9th Edition has some nice features. Here are the biggest changes:
- More data, but there are still a lot of data-sets that have the small sample size warning.
- Added ten new land uses.
- Added hourly distributions for some of the land uses. This is a big plus.
- Includes the Trip Generation Handbook, 2nd Edition so you no longer have to buy that separately to get the pass-by/diverted trip data.
The 9th Edition is an improvement over the 8th, but it's not a quantum leap forward. I still need to test out and give you a review of OTISS.
Probably the biggest change I'd like to see in a future edition is a new methodology for internal capture rates. The methodology in the Handbook is pretty convoluted and based on a small data set. There is better data floating out there.
Also – stay tuned. In the next couple of weeks I'll be posting about the actual changes to the data. We're using the 8th Edition spreadsheet ITE made us remove, creating a worksheet with 9th Edition data, and creating a worksheet the does the math on the changes.