Traffic Impact Fee Calculator

Estimate development traffic impact fees from ITE trip generation rates, pass-by reductions, and fee schedules.

Inputs

Land Use Type

Building Size / Units

Fee per Trip

Pass-By Trip Reduction

Internal Capture

Transit Credit

Tab to move between fields

Results

Total Impact Fee

$111,750.00

≈ 7 used cars

Net New PM Trips

74.5

Gross PM Trips74.5

Est. Daily Trips745

Fee per SF/Unit$2.24

Land UseGeneral Office (ITE 710)

ITE Trip Rate1.49

How to Use This Calculator

Enter Land Use Type, General Office, and Shopping Center.
Set Restaurant, Residential Apartment, and Warehouse.
Adjust Hotel, Building Size / Units as needed.
Review Total Impact Fee ($) and Net New PM Trips.
Use Gross PM Trips and Est. Daily Trips to inform your decision.

How the result changes with Building Size / Units

Building Size / Units	Total Impact Fee	Net New PM Trips
100,090	$223,701.00	149.1
350,065	$782,395.00	521.6
650,035	$1,452,828.00	968.6
900,010	$2,011,522.00	1,341

What each input means

Land Use Type: Select land use type. Trip rates from ITE Trip Generation Manual, 11th Edition.
Building Size / Units: Gross floor area in sq ft for commercial, or number of dwelling units/rooms for residential/hotel.
Fee per Trip: Impact fee per new PM peak-hour trip. Varies by jurisdiction ($500-$5,000+).
Pass-By Trip Reduction: Percentage of trips already on the roadway that divert in (common for retail: 25-50%).
Internal Capture: Percentage of trips captured within a mixed-use site, not hitting the external road.
Transit Credit: Credit for proximity to transit, reducing vehicle trip generation.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Land Use Type = 1, Building Size / Units = 50000, Fee per Trip = 1500, Pass-By Trip Reduction = 0 = 6 input(s) provided
Calculate Total Impact Fee
Total Impact Fee
111750 = $111,750
Calculate Net New PM Trips
Net New PM Trips
74.5 = 74.5
Calculate Gross PM Trips
Gross PM Trips
74.5 = 74.5
Calculate Est. Daily Trips
Est. Daily Trips
745 = 745

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