January 6


Spreadsheet with Parking Generation Data

By Mike Spack

January 6, 2011

ITE Parking Generation Report, Parking Demand, Parking Generation Rates, Parking Study

Parking 4th In October I wrote about ITE's (Institute of Transportation Engineers) 4th Edition of the Parking Generation report here.  I promised to post later in the fall with a spreadsheet containing a summary of the data.  Winter began officially on December 21st  (although Minnesotans had snow much earlier than that), so I'm a few weeks late in delivering this file – (REMOVED BASED ON ITE LEGAL REQUEST).    (DISCLAIMER – there's no guarantee that the data in the spreadsheet 100% matches the data in the Parking Generation report.  We did our best with quality control, but mistakes happen.  Please let us know if you catch any typos.)

The spreadsheet includes average and 85th percentile rates for the peak parking period for each land use.  Please note we colored cells to highlight rates with small data sample sizes (see the key at the bottom of the spreadsheet). 

Thanks to Max Moreland (who recently joined me at Spack Consulting) for putting this together.  We hope you find this useful!

  • I think the Average Saturday Peak Period ratefor the Assisted Living category is incorrect. I have the 3rd Edition, which shows the rate to be 0.24/DU, whereas your spreadsheet shows 0.4/DU. I noticed it because the 85th % rate is lower than the listed average. Thanks for the info!

  • D.J.,
    I agree the numbers look transposed.
    The 3rd Edition has the following data for Assisted Living facilities on a Saturday:
    -Average = 0.40
    – 85th Percentile = 0.31
    – 33rd Percentile = 0.54
    We listed the data faithfully, but it appears there’s a typo in the 3rd Edition. I’d design using the weekday rates since they’re a fraction larger (and look correct) than Saturday’s.
    Thanks for the note and for looking at the data to see if it makes sense. Let me know if you catch anything else.

  • Mike,
    When you have multiple criteria listed for a single land use (i.e. “Clinic 630”) are the numbers additive for KSF _and_ numbers of employees?

  • They numbers aren’t additive, it’s an either or situation to come up with the trip generation. The rates are roughly based on the same database of how much traffic is generated by a site, but sometimes the building square footage is reported, sometimes employees, sometimes both.

  • Mike, I’ve not used something like this before and wanted to check that I understand. I’m looking for the parking statistic I need to use for credit SS4.4 (LEED v2.2) for a multiple use building which includes auditorium, cinema, plaza with shops and restaurants, offices, library, museum… I’ve selected Multipurpose recreational facility 435* and plan to add the square footage into column J of your spreadsheet to get the number I need. Is that correct?

  • Could I get a look at the spreadsheet? I am an A/L developer in AZ and looking for a parking reduction in one of the municipalities.

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    Mike Spack

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