tia.pdfTS1ODQNUtiuos, Inc.
82SU-1G5thAvenue NE
Suite 100
Redmond, NN88052-SG20
T 425-8834134
F 425'867-0898
To: Doug Spee, Edmonds 2020 LILC
From: Jeffrey Hee, P.E., TSI
Subject: Edmonds Post Office Site Development— Phase 1
Traffic Impact Analysis
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The following includes the Traffic Impact Analysis for your proposed Edmonds Post Office Site
Development located atZO1Main Street. This document includes asummary ofthe proposal, review of
sight distance, trip generation calculations, and estimate of traffic impact fees.
I trust this information will meet your needs; however, please feel free to contact me at your
convenience ifyou should have any questions orcomments.
Development Proposal:
We understand you are proposing to redevelop the existing post office site located on the northwestern
half street block bound by of the Main Street, 2nd Ave N, 3rd Ave N and Bell Street. You are proposing
to develop this site in two phases; and this analysis focuses only on Phase 1, which is anticipated to be
complete and occupied by2O16. Phase 2will bedeveloped atalater date.
Your proposal includes a four story apartment complex with 43 apartment units. Site access isproposed
off 2nd Ave N. A vicinity map and a site plan are attached for reference.
This study is intended to walk the reviewer through the relevant sections of the City of Edmonds Traffic
Impact Analysis Worksheet, also attached.
Stopping and intersection sight distance was evaluated at the proposed site access per AASHTO A Policy
unGeometric Design ofHighways and Streets; 6th Edition (2O11). For this analysis o3O'mphdesign
speed was assumed on2nd Ave N.
* Stopping sight distance is the distance required for an approaching driver to recognize an
obstacle onthe roadway, apply the vehicle's breaks and stop the vehicle.
* Intersection (or entering) sight distance i (1) the distance required for an approaching driver to
slow to avoid colliding with avehide entering the mainline and (2) the distance required for a
driver to determine whether it is safe to enter the mainline.
Doug Spee
TSI Edmonds Post Office Site Development — Phase 1
Transportation Solutions, Inc, June 26, 2013
Page 2 of 2
Table 1 summarizes the sight distance requirements which are required to be met looking left and right
at the proposed 2nd Ave N site access. The proposed site access shall meet these requirements.
Table 1. Sight Distance Requirements
Sight Distance Measure: Requirement
Stopping Sight Distance 200 -feet
Intersection Sight Distance 335 -feet
Trip Generation
The existing 8,632 sq. ft. U.S. Post Office will be retained with the proposed development. No new trips
are forecast to be generated by the existing post office land use.
Table 2 summarizes the trip generation forecast for the proposed development of 43 apartment units.
Data from the ITE Trip Generation Manual; 9th Edition (2012) was used to forecast trip generation for
the proposal. For this study the ITE LU 223, "Mid -Rise Apartment", was used to describe the proposed
development. While we anticipate that there will be some trips shared between the proposed
apartments and existing post office, trip sharing between these land uses is assumed to be minimal.
Table 2. Trip Generation
Land Use
Units
Trip Rate
%in
In
Out
Total
Weekday Trips
43
4.00*
50%
86
86
172
PM Peak Hour Trips
43
0.39
58%
10
7
17
* Data not available, assumed to be approximately 10 times the PM Peak Hour Trip Rate
Phase 1 is forecast to generate 172 new weekday trips and 17 new PM peak hour trips. The proposal
does not generate a significant amount of new traffic to the local street network.
Traffic Impact Fees
Table 3 summarizes are estimate of traffic impact fees for the development of 43 apartments. The 2009
Impact Fee Schedule was utilized for the following estimate.
Table 3. Traffic Impact Fee Estimate
Land use
Units
Fee Rate
Fee Estimate
Apartment
43
$776.56
$33,392.08
Attachments:
® Vicinity Map
® Site Plan
® ITE Trip Generation Manual Excerpts for Mid -Rise Apartment land use
® Complete Traffic Impact Analysis Worksheet
TS1
on Solutions, Inc
Vicinity Map
Post Office Site Development
Traffic Impact Analysis
Edmonds, WA
Land Use° 223
��"���������� Apartment
"°""�� " ^°~~~~
Mid -rise apartments are apartments (rental dwelling units) in rental buildings that have between
three and 10 levels (floors), Apartment (Land Use 220), low-rise apartment (Land Use 22 1) and high-
rise apartment (Land Use 222) are related uses.
The peak hour of the generator typically coincided with the peak hour of the adjacent street traffic.
The sites were surveyed iDthe late 1980s|nMontgomery County, Maryland,
321
386 Trip Generation, 9th Edition w |n;UkKpn[Transportation Engineers
Mid -Rise Apartment
(223-)
Average Vehicle Trip Ends vs: Dwelling Units
On a: Weekday,
Peak Hour of Adjacent Street Traffic,
One Hour Between 7 and 9 a.m.
Number of Studies: 7
Avg. Number of Dwelling Units: 120
Directional Distribution: 31% entering, 69% exiting
Trip Generation per Dwelling Unit
Average Rate Range of Rates Standard Deviation
0.30 OM - 0.46 0.56
Data Plot and Equation
'0
801 -
70
60
W
Q_
50
40
cel
30
20
10
0
I X
50 60 70 80 90 100 ItO 120 130 140 150 160 170 180 190 200 210 220 230
X = Number of Dwelling Units
Actual Data Points - Fitted Curve ------ Average Rate
2
Fitted Curve Equation: T = 0.41(X) - 13.06 R = 0.83
Trip Generation, 9th Edition * Institute of Transportation Engineers 3137
Mid -Rose Apartment
(223)
Average Vehicle Trip Ends vs: Dwelling Units
On a: Weekday,
Peak Hour of Adjacent Street Traffic,
One Hour Between 4 and 6 p.m.
Number of Studies: 7
Avg. Number of Dwelling Units: 120
Directional Distribution: 58% entering, 42% exiting
Average Rate Range of Rates Standard Deviation
0.39 0.15 - 0.54 0.63
110
100
90
80
to
a
C
uJ 70
75 60
:E
50
CY)
W
< 40
30
20
10
50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230
X = Number of Dwelling Units
X Actual Data Points Fitted Curve ------ Average Rate
Fitted Curve Equation: T = 0.48(X) - 11.07 R, = 0.89
388 Trip Generation, 9th Edition e Institute of Transportation Engineers
OV r't)it,
C�
City of Edmonds
Traffic Impact Analysis Worksheet
/1". 1 's
Name of Proposed Project:' S t'tT-1y
Owner/Applicant
uCA - e , MM 2-020 L.Lr-
Name
30-4 41 _e_ -r
Street/Mailing Address
p r"E)WD' VSA C(802,0
City
Telephone:
State
Applicant Contact Person:
Name
Street/Mailing Address
Zip City
Telephone:
State Zip
Traffic Engineer who prepared the Traffic Impact Analysis (if applicable):
-7ey(=
Firm Name Contact Name
Telephone: C42 -S) Sgt -41-54 E-mail: iejvp�Q-1%71v1W.c.0m
THRESHOLD LEVELS OF ANALYSIS
Project Traffic Levels Sections to Complete
L Less than 25 peak -hour trips generated 1 and 7 only (Worksheet/Checklist)
II. More than 25 peak -hour trips generated All sections
1. PROJECT DESCRIPTION
a. Location -Street address:
(Attach a vicinio, snap and site plan.)
b. Specify existing land use: PC,,5 r e-EmA w_)
c. Specify proposed type and size of development: A '-"A?A9-''amt L-W-010cl
L-01- AVAa-�"'1E (AO( (# of residential units and/or square footage of building)
Remised on 6/24/10 E82 - Traffic Impact Analysis Iforksheet Page 1 of 5
d. Date construction will begin and be completed:
e. Define proposed access locations:
2 6 - 201—,
f. Define proposed sight distance at site egress locations: '20'®® 9-r-pptmA 8P
t 1,4 . c.rtys1 b d 9 ty "-}{°r'0 Cv¢- e. 6�-w_
2. TRIP GENERATION
Source shall be the Eighth Edition of the Institute of Transportation Engineers (ITE) Trip Generation
manual. For independent fee calculations, the current edition of the ITE manual may be used.
ADT = Average Daily Traffic
PM Peak -hour trips (AM, noon or school peak may also apply as directed by the City Engineer)
a. Existing Site Trip Generation Table:
Revised on 6124110 E82 - Traffic Impact Analysis Worksheet Page 2 (?F5
PM Peak -Hour Trips
Land Use
Daily (ADT)
IN OUT
LAs Posr^r-kae-
W I Pr
r4
b. Proposed Project Trip Generation Table:
PM Peak -Hour Trips
Land Use Daily (ADT) IN OUT
M I PAR ISE
AFAV.rmewr
t 2_
! r�
e. Net New Project Trip Generation Table:
PM Peak -Hour Trips
Land Use Daily (ADT) IN OUT
Mev -puce
0-42�.
t
d. State assumptions and methodology for internal, link -diverted or passby trips:
IMMKNAL. ® N 4Lxr_t5
t>1vEK P/ PMS-" -- p- Qe51ParnAAL USS
50E `WA ti4 .
Revised on 6124110 E82 - Traffic Impact Analysis Worksheet Page 2 (?F5
3. TRIP DISTRIBUTION
Prepare and attach a graphic showing project trip distribution percentages and assignments. For
developments that generate over 75 peak -hour trips, the City Engineer reserves the right to require
trip distribution to be determined through use of the City traffic model.1 NIA
4. SITE ACCESS ROADWAY/DRIVEWAYS AND SAFETY
a. Have sight distance requirements at egress location been met per AASHTO requirements?
� F-1
b. Intersection Level of Service (LOS) Analysis: 01A
Intersections to be evaluated shall be determined by the City of Edmonds Traffic Engineer
Existing Conditions
LOS
95%
Delays
Year of Opening
LOS
Delays
Five Years Beyond Change of
Five Years Beyond Change of
LOS
Land Use
Delays
Land Use
c. Describe channelization warrants: w f p.
(Attach str ping plan)
d. Velriete Storage/Queuing Analysis (calculate 50% and 95 % quening lengths): 0/A
e. If appropriate, state traffic control warrants (e.g. stop sign warrants, signal warrants): NSA
f. Summarize Local accident history' (only required for access to principal and minor arterials): "%A
Available upon request at City of Edmonds Development Services Department
Available upon Bequest at City of Edmonds Police Department
Revised ori 6124/10 E82 - Trafftc Impact Analysis YYorksheel Page 3 0l'5
50%
95%
Existing Conditions
Year of Opening
Five Years Beyond Change of
Land Use
e. If appropriate, state traffic control warrants (e.g. stop sign warrants, signal warrants): NSA
f. Summarize Local accident history' (only required for access to principal and minor arterials): "%A
Available upon request at City of Edmonds Development Services Department
Available upon Bequest at City of Edmonds Police Department
Revised ori 6124/10 E82 - Trafftc Impact Analysis YYorksheel Page 3 0l'5
S. TRAFFIC VOLUMES
Provide the following and other planned development traffic within the city.I NIA
a. Describe existing ADT and peak -hour counts (less than two years old), including turning
movements, on street adjacent to and directly impacted by the project.
b. Describe the estimated ADT and peak -hour counts, including turning movements, the year the
project is fully open (with and without project traffic). t4
c. Describe the estimated ADT and peak -hour counts, including turning movements, five years
after the project has been fully open (with and without project traffic). tolp
d. State annual background traffic growth factor and source: IJIA
6. LEVEL OF SERVICE (LOS) ANALYSIS
a. Suminarize Level of Service Analysis below and attach supporting LOS analysis documentation.
Provide the following documentation for each arterial street or arterial intersection impacted by
ten or more peak -hour trips. Other City -planned developments I must also be factored into the
LOS calculations.
01P
LOS
LOS
Existing Conditions
Existing
Delays
Year of Opening
With Project
Without Project
veYears Beyond Change of
ELand Use
With Project
Without Project
b. Note any assumptions/variations to standard analysis default values and justifications: 01A
A list of planned developments are available at the City upon request for public records
Revised on 6124110 E82 - Traffic Npact Analysis Worksheet Page 4 of'5
7. MITIGATION RECOMMENDATIONS
State recommended measures and fees required to mitigate project specific traffic impacts. Traffic
impact fee shall be calculated from the Edmonds Road Impact Fee Rate Study Table 4 (attached)
and as identified in ECDC 18.82.120, except as otherwise provided for independent fee calculations
in ECDC 18.82.130.
CIIANGE IN USE
Fee for prior use shall be based on fee established at the time the prior use was permitted. If the
previous use was permitted prior to the adoption of Ordinance 3516 (effective date: 09/12/04),
the 2004 ECDC 18.82.120 impact fee shall be used.
ITE Land Use Category Per Unit
Fee Rate
New Use $ X
Prior Use $ X
New Use Fee: $ Prior Use Fee:
NEW DEVELOPMENT
Units in
square feet,
# of dwelling,
vfp, etc.
Units in
ITE Land Use Category Per Unit square feet, Fee
Fee Rate # of dwelling,
of , etc.
New Use APASTMEWT $ 146.15 a X 42,
—00reWTIM1.
MITIGATION FEE RECOMMENDATION:
INDEPENDENT FEE CALCULATION: $200.00 + consultant fee $ '/A
TOTAL TRAFFIC IMPACT FEE $ a '
City of Edmonds, Engineering Division Approval Date
'No impact fees will be due, nor will a credit be given, for an impact fee calculation resulting in a net negative.
Revised on 6124110 E82 - Trak hnpaet heal ysis GForksheet Page 5 of 5
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