NEW Trip Generation, 8th Edition

I received the brand new, 8th Edition of the Institute of Transportation Engineers' (aka ITE) Trip Generation informational report.  See my previous post explaining what this report is and how it is used.  The 7th Edition should no longer be cited in traffic studies.

I am proud to see Traffic Data Inc. listed as Source 621.  We contributed data on pharmacies with drive through lanes and coffee shops (with and without drive through lanes).  Now I can stop referencing our special studies and just use the data published in Trip Generation.

One large change I am happy to see is related to banks.  The new Trip Generation removed all of the data prior to 2000 in recognition of online banking, atms, and shifted banking hours.  The result is that the traffic predicted to come out of banks has been approximately cut in half.  This matches what I have instinctively been thinking (and congratulations to Tom Sohrweide of SEH who has been cutting his trip generation from banks in half based on his judgment).  Now I have the data to back me up and I don't need to cringe when a developer tells me he is thinking a bank will go on one of his outlots.

Comments

[tijana hamilton]

Is there any way you could email the pages referencing the new bank trip generation rates (Land Use 912), as well the supercenter rates (Land Use 813). I have hearing tonight and have not received my 8th Edition yet (though ordered quite a while ago!). Your contribution to the 8th Edition (as well as to this specific request) is greatly appreciated.

[Mike Spack]

Tijana,
I think I am a little late, but here are average rates for each land use:

Drive-In Bank (912)
Weekday - 148.15 trips per 1000 sq ft, 50% entering/50% exiting

A.M. Peak Hour (between 7-9 a.m.) - 12.35 trips per 1000 sq ft, 56% entering/44% exiting

P.M. Peak Hour (between 4-6 p.m.) - 25.82 trips per 1000 sq ft, 50% entering/50% exiting

Free Standing Discount Superstore (813)
Weekday - 53.13 trips per 1000 sq ft, 50% entering/50% exiting

A.M. Peak Hour (between 7-9 a.m.) - 1.67 trips per 1000 sq ft, 56% entering/44% exiting

P.M. Peak Hour (between 4-6 p.m.) - 4.61 trips per 1000 sq ft, 49% entering/51% exiting

[Tim Monger]

Mike, Can you tell me the national employee densities (Employees per 1,000 SF) for General Light Industrial, General Heavy Industrial, Industrial Park, Manufacturing, & Warehousing? I have the 5th Edition numbers & wanted to compare the changes, if any. Thanks, Tim

[Mike]

The 8th Edition doesn't have Employees per 1,000, but it can be calculated by dividing daily trip per employee by daily trips per 1,000. Here they are (Employees per 1,000 SF from the 8th Edition):
General Light Industrial =0.43
General Heavy Industrial = 0.55
Industrial Park = 0.48
Manufacturing = 0.56
Warehousing = 1.09

Mike

[Tim Monger]

Mike, Thanks for your response. The 5th Edition numbers are significantly higher.
Gen Light Ind. - 2.16
Gen Heavy Ind. - 1.82
Ind. Park - 2.00
Manufacturing - 1.87
Warehousing 1.28
Can you explain the difference?
A Build-Out Projection in a CA community showed the following:
Light Ind. - 1,030 SF/Employee
Heavy Ind. - 1,500 SF/Employee
Business Park - 600 SF/Employee
These #'s are between the 5th Editon & 8th Edition.

[Mike]

Sorry - I am moving too fast and did the inverse of the calculation. Here are what the numbers should be:
General Light Industrial = 2.33
General Heavy Industrial = 1.82
Industrial Park = 2.08
Manufacturing = 1.79
Warehousing = 0.92
Mike

[Paul]

Mike,

I am interested in the revised trip generation numbers for pharmacies with 2 drive through lanes.

Congratulations on the inclusion of your research.

[Mike]

The new (8th Edition) average rates for land use 881 are:

weekday - 88.16 trips per 1000 sq ft gross floor area

am peak hour (between 7 and 9 am) - 2.66 trips per 1000 sq ft gross floor area

pm peak hour (between 4 and 6 pm) - 10.35 trips per 1000 sq ft gross floor area

The R Squared value on the data is too low to be calculated so no fitted curve equations are given. The normal caveats with using the Trip Generation Report should be kept in mind.

[Ted]

Mike, what are the new trip generation rates for ITE Code 630 (Clinic)?

[Mike Spack]

Ted,
The Eighth Edition rates for ITE Code 630 (Clinic) are exactly the same as the Seventh Edition. The data set is very limited, so I am not sure I want to put it out there. Let me know if you need specific numbers, but I assume you still have the Seventh Edition.
Mike