HomeMy WebLinkAboutRS_Trip_Generation_Report_SapphireOnTalbot_181101_v1.pdfDT affic
CONSULTANTS
Transportation Engineers and Planners
PO Box 547
Preston, Washington 98050
Memorandum
To:
Troy Schmeil
Callidus Development
From:
Gary A. Norris, PE, PTOE
DN Traffic Consultants
Date:
September 28, 2018
Subject:
Sapphire on Talbot
PRE 18-000356
Re:
Trip Generation Report
Summary
This memorandum was prepared in response to the City of Renton's comment memorandum letter
dated June 7, 2018 regarding the Talbot Road Townhomes proposed development located at 4827
Talbot Road. The name of the development, however has been changed to "Sapphire on Talbot" as
noted in the subject line. The review comment applicable to trip generation was identified as number 9
in the Transportation Section in the June 7, 2018 memo and is stated as follows:
The applicant shall submit a Trip Generation Report based on the project's use and trip
generation data from the 10th Edition of the Trip Generation Manual published by the Institute of
Transportation Engineers (ITE) with the site plan submittal. A Traffic Impact Analysis Der City o
Renton standards is reauired if the redevelopment generates new vehicular traffic exceeding 20
vehicles Der hour in either the AM (6:00 — 9:00) or PM (3:00— 6:00) peak periods as determined
by the Trip Generation Report. (Underline mine).
Project Description
Development Proposal
The proposed "Sapphire on Talbot" townhome development is located at 4827 Talbot Road within the
city of Renton. The subject property consists of one (1) parcel on the west side of Talbot Road South
just south of South 48th Street. The project site totals 1.69 acres and is zoned Resesidential-14 (R-14) or
11 Page
Mua'ffic
CQNSU TANNTS
Transportation Engineers and Planners
PO Box 547
Preston, Washington 98050
14 dwelling units per acre. The lot slopes approximately 9% from the east to the west and is
predominately covered by maintained lawn and landscape trees. See Figure 1.
The site is occupied by an existing single-family residence. The development proposal includes 21
townhomes in eight (8) buildings; 3 -duplexes and 5 -triplexes. Public access to the proposed apartments
is from Talbot Road South. See Figure 2.
The proposed development fronts Talbot Road South along the east property line. Talbot Road South is
classified as a Collector Arterial Road. Existing right-of-way (ROW) width is approximately 60 feet. On
the north property line, the development fronts South 48th Street. South 48 -Street is classified as a
Private Road. An access easement will be required if access via South 48 -Street is proposed as part of
the development.
Project Trip Generation
As stated above, the proposed development Sapphire on Talbot includes a total of 21 townhome units.
There is an existing single-family residence which will be removed as part of the development. Existing
trips will be deducted from the trips generated by the proposed development.
Using the 10th Edition of the Trip Generation Manual published by the Institute of Transportation
Engineers (ITE) as required by the City. Land Use Code 210, Single Family Detached Housing was used to
calculated trips generated by the existing single-family residence and Land Use Code 220, Multi -Family
Housing (Low Rise) was used to calculate trips generated by the proposed townhome development. A
summary of the trip generation calculation is summarized in Table 1 below.
Table 1. Trip Generation
As shown in Table 1, the proposed Sapphire on Talbot is estimated to generate 133 daily trips, eight (8)
AM peak trips and eleven (11) PM peak trips. The existing single-family residence is estimated to
generate six (6) daily trips, one (1) AM peak trip and one (1) PM peak trips. Deducting these trips from
the estimated trips for Sapphire on Talbot results in a total of 12.7 daily trips, seven (7) AM peak hour
and ten (10) PM peak hour trips.
The City of Renton requires a development prepare a full traffic impact analysis (TIA) if the proposed
development generates new vehicular traffic volumes exceeding 20 trips per hour. The result of the trip
generation analysis for Sapphire on Talbot does not generate sufficient AM or PM peak hour trips to
2 1 P a g e
AM
Peak Hour
PM Peak Hour
Land Use
AWDT
Total
In
Out
Total
In
Out
Sapphire on Talbot
- 21 townhomes
133
8
1
7
11
7
4
Existing SF Resident
6
1
1
1
1
Net Impact
127
7
1
6
10
6
4
As shown in Table 1, the proposed Sapphire on Talbot is estimated to generate 133 daily trips, eight (8)
AM peak trips and eleven (11) PM peak trips. The existing single-family residence is estimated to
generate six (6) daily trips, one (1) AM peak trip and one (1) PM peak trips. Deducting these trips from
the estimated trips for Sapphire on Talbot results in a total of 12.7 daily trips, seven (7) AM peak hour
and ten (10) PM peak hour trips.
The City of Renton requires a development prepare a full traffic impact analysis (TIA) if the proposed
development generates new vehicular traffic volumes exceeding 20 trips per hour. The result of the trip
generation analysis for Sapphire on Talbot does not generate sufficient AM or PM peak hour trips to
2 1 P a g e
� �
Li
alley Mescal Center. .a SE,Car
Emergency Roo
Orf -St Sr43rd'St z i
♦ I �
99 R'anch,Markef , }
It � !
.a M ANN"
erV ces 0
JY- Seatt
' orgat� .p ments
'hand Townhornes
: A , tir
r "
s w ■ a+
Eli
��,Qbrook Apartments ...
DN TRAFFIC
CONSULTANTS, INC
SITE PLAN
FIGURE 2
SAPPHIRE ON
TALBOT
I)T affic
CONSULTANTS
Transportation Engineers and Planners
PO Box 547
Preston, Washington 98050
require a traffic impact analysis (TIA) in accordance with City of Renton Development Standards.
Sapphire on Talbot will generate a maximum of ten (10) new trips, during the PM peak hour, which is
significantly less than the City of Renton requirement for a TIA of 20 new trips.
Therefore, no further traffic analysis or studies are required.
S I P a g e