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2813 Rockefeller Avenue Suite B Everett, WA 98201
Tel: 425-339-8266 Fax: 425-258-2922 E-mail: info@gibsontraffic.com
MEMORANDUM
To: Brett Van Slyke, Habitat for Humanity
From: Brad Lincoln, PE
Project: Habitat for Humanity Development
GTC #19-248
Subject: Traffic Analysis
Date: October 7, 2019
This memorandum summarizes the trip generation and traffic mitigation fee calculations for the
Habitat for Humanity Development. The development site is located along 127th Avenue SE, south
of SE 172nd Street, in the City of Renton. A site vicinity map in included in Figure 1.
Figure 1: Site Vicinity
SE 172nd St 128th Ave SE SITE 127th Ave SE RECEIVED
11/04/2019
amorganroth
PLANNING DIVISION
Habitat for Humanity Traffic Analysis
Gibson Traffic Consultants, Inc. October 2019
info@gibsontraffic.com 2 GTC #19-248
1. Trip Generation Calculations
The Habitat for Humanity development is proposed to include 12 residential units arranged three 4-
plex buildings. The trip generation calculations for the Habitat for Humanity development are based
on data contained in the Institute of Transportation Engineers’ (ITE) Trip Generation Manual, 10th
Edition (2017). The average trip generation rates for ITE Land Use Code 220, Multifamily Housing
(Low-Rise), have been used for the trip generation calculations. The new trips generated by the
proposed Habitat for Humanity development are summarized in Table 1.
Table 1: Trip Generation Summary
12 New
Residential Units
Average Daily Trips AM Peak-Hour Trips PM Peak-Hour Trips
Inbound Outbound Total Inbound Outbound Total Inbound Outbound Total
Generation Rate 7.32 trips per unit 0.46 trips per unit 0.56 trips per unit
Splits 50% 50% 100% 23% 77% 100% 63% 37% 100%
Trips 44 44 88 1 5 6 4 3 7
The Habitat for Humanity development is anticipated to generate 88 average daily trips with 6 AM
peak-hour trips and 7 PM peak-hour trips.
The City of Renton Policy Guidelines for Traffic Impact Analysis for New Development identifies
that a traffic impact analysis is only required for developments that generate 20 or more AM or PM
peak-hour trips. The Habitat for Humanity development does not exceed this threshold and, therefore,
a full traffic impact analysis is not required.
2. Transportation Impact Fees
The transportation impact fee for the Habitat for Humanity development have been determined based
on criteria identified in Renton Municipal Code (RMC) 4-1-210. The Habitat for Humanity
development meets the eligibility requirements of RMC 4-1-210.B.3 and therefore transportation
impact fees should not be required for the Habitat for Humanity development.