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MEMORANDUM
To: Geoff Stensland, Bellevue Badminton Club
From: Brad Lincoln, PE
Subject: Badminton America Traffic Analysis
Date: June 12, 2018
Project #: 18-130
This traffic analysis summarizes the trip generation and traffic mitigation fee calculations for the
Badminton America development. The development is proposed to convert 24,976 SF of existing
building space from warehouse to a badminton club. The badminton club is proposed to have 12
courts. The building is located on the east side of Line Avenue SW, south of SW 7th Street. A site
vicinity map in included in Figure 1.
Figure 1: Site Vicinity
SITE
SW 7th St Lind Ave SW
Badminton America Traffic Analysis
Gibson Traffic Consultants, Inc. June 2018
info@gibsontraffic.com 2 GTC #18-130
1. TRIP GENERATION CALCULATIONS
The trip generation calculations for the Badminton America development are based on data collected
at a similar site in the City of Mukilteo, data contained in the Institute of Transportation Engineers’
(ITE) Trip Generation Manual, 10th Edition (2017) and testimony of expected operations.
1.1. Proposed Badminton Use
PM peak-hour data was collected by the independent count firm Traffic Data Gathering (TDG) in
May 2018 at the Harbour Pointe Badminton Club in Mukilteo, Washington. The Harbour Point
Badminton Club was chosen since it has the same number of courts (12) and is in a building with
similar square-footage. The counts were performed between 4:00 PM and 6:00 PM on a Tuesday and
a Wednesday. The count data at the existing Harbour Pointe Badminton Club is summarized in Table
1.
Table 1: PM Peak-Hour Trip Generation Summary – Existing Site
Day Trips Inbound % Outbound %
Tuesday
May 1, 2018 10 80% 20%
Wednesday
May 2, 2018 14 93% 7%
Average 12 87% 13%
The gross trip generation shown in Table 1 does not account for any pass-by trips, which are trips
currently traveling on the roadways along the development’s frontage. A pass-by reduction of 25%
has been applied to the trip generation for the site to determine the trips that would be required to pay
mitigation fees. This pass-by rate has been capped at a realistic 25% even though some jurisdictions
in the Puget Sound area identifies a pass-by rate of 54% for health club uses and GTC conducted a
pass-by study in the City of Bothell which showed pass-by rates as high as 59% for health clubs. The
site is located along an arterial and is between two arterials. A 25% pass-by reduction should therefore
be applicable for this site.
The Harbour Pointe Badminton Club generates 1 gross trip per court. The proposed development will
have the same number of courts (12) and is therefore anticipated to generate 12 gross PM peak-hour
trips and 9 net PM peak-hour trips after a 25% pass-by reduction. This would result in the site
generating 9 net PM peak-hour trips, 8 inbound trips and 1 outbound trip. The count data is included
in the attachments.
The daily trip generation of the site is based on a comparison to ITE Land Use Code 490, Tennis
Courts. The ratio of daily to PM peak-hour trips for ITE Land Use Code 490 is 7.2 daily trips to 1
PM peak-hour trip. The proposed Badminton Court is therefore anticipated to generate 86 gross
average daily trips, which is 64 net average daily trips after a 25% pass-by reduction. The ITE data is
included in the attachments.
Badminton America Traffic Analysis
Gibson Traffic Consultants, Inc. June 2018
info@gibsontraffic.com 3 GTC #18-130
1.2. Existing Use
The badminton use will replace 24,976 SF of warehouse use. The credit for the existing warehouse
use is based on ITE Land Use Code 150, Warehouse. The trip generation of the existing warehouse
use is summarized in Table 2.
Table 2: Trip Generation Calculations – Existing Warehouse Use
24,976 SF
Warehouse
Average Daily Trips PM Peak-Hour Trips
Inbound Outbound Total Inbound Outbound Total
Generation Rate 1.74 trips per 1,000 SF 0.19 trips per 1,000 SF
Splits 50% 50% 100% 27% 72% 100%
Trips 22 21 43 1 4 5
The trip generation data for ITE Land Use Code 150 is included in the attachments.
1.3. New Trip Generation
The new trips that will be generated by the badminton use have been calculated by subtracting the
trips generated by the existing warehouse use from the proposed badminton trips. The summary of
the new trip generation is included in Table 3.
Table 3: Trip Generation Calculations – New Trips
Land Use Average
Daily Trips
PM Peak-Hour Trips
Inbound Outbound Total
Badminton America1
(proposed use ) 64 8 1 9
Warehouse
(to be removed) -43 1 4 5
Net New Trips 21 7 -3 4
The Badminton America use is anticipated to result in the trip generation of 21 net new daily trips
with 4 net new PM peak-hour trips after pass-by reductions and credit for the existing warehouse
operations being removed. The development will not meet the thresholds identified in the City of
Renton Policy Guidelines for Traffic Impact Analysis of New Development (200 daily trips and 20
peak-hour trips) to require a fill traffic impact analysis.
1 Includes a 25% pass-by reduction.
Badminton America Traffic Analysis
Gibson Traffic Consultants, Inc. June 2018
info@gibsontraffic.com 4 GTC #18-130
2. TRAFFIC IMPACT FEE CALCULATIONS
The traffic impact fees or the Badminton America development are based on the estimated cost per
trip end of $3,572.93 provided by City of Renton staff. The Badminton America development is
anticipated to generate 4 net new PM peak-hour trips, resulting in a total traffic impact fee of
$14,291.72.
A
Counts and ITE Trip Generation Data
LOCATION:Harbour Point Badminton Club
3616 South Rd, Building D
Mukilteo, WA
IN OUT Drive Thru IN OUT Drive Thru
04:15 PM 0 0 5 0 0 5
04:30 PM 0 0 3 0 0 1
04:45 PM 0 0 4 0 0 7
05:00 PM 1 0 0 0 0 0
05:15 PM 1 1 0 3 0 0
05:30 PM 2 0 1 1 1 0
05:45 PM 2 0 0 2 0 2
06:00 PM 3 1 0 7 0 0
Note: Badminton Club opens at 5:00 PM
TIME ENDING
AT
Tue. 5/1/2018
REDUCTION SHEET
Wed. 5/2/2018
NOTE: The "Drive Thru" trips are associated with the surrounding industrial uses and not the
Harbour Pointe Badminton Club.
A - 1
Location: Harbour Point Badminton Club
Date: 5/1/2018 Date: 5/2/2018
Time Ending Inbound Outbound Total Time Ending Inbound Outbound Total
4:15 PM 0 0 4:15 PM 0 0
4:30 PM 0 0 4:30 PM 0 0
4:45 PM 0 0 4:45 PM 0 0
5:00 PM 1 0 1 5:00 PM 0 0 0
5:15 PM 1 1 3 5:15 PM 3 0 3
5:30 PM 2 0 5 5:30 PM 1 1 5
5:45 PM 2 0 7 5:45 PM 2 0 7
6:00 PM 3 1 10 6:00 PM 7 0 14
Peak‐Hour Inbound Outbound Total Peak‐Hour Inbound Outbound Total
5:00 ‐ 6:00 8 2 10 5:00 ‐ 6:00 13 1 14
80% 20% 93% 7%
Average Inbound Outbound Total
10 2 12
87% 13%
Variable Size Rate
Courts 12 1.00
ITE LUC
490 ADT 30.32
Tennis Courts PM 4.21
Conversion 7.2
A - 2
A - 3
A - 4
A - 5
A - 6
Badminton AmericaGTC #18-130Trip Generation for: Weekday(a.k.a.): Average Weekday Daily Trips (AWDT)NET EXTERNAL TRIPS BY TYPEIN BOTH DIRECTIONS DIRECTIONAL ASSIGNMENTSGross TripsInternalCrossoverTOTAL PASS-BYDIVERTED LINKNEW PASS-BYDIVERTED LINKNEWLAND USES VARIABLEITE LU codeTripRate%IN%OUTIn+Out(Total)% ofGrossTripsTripsIn+Out(Total)In+Out(Total)% ofExt.TripsIn+Out(Total)% ofExt.TripsIn+Out(Total)In+Out(Total)In Out In Out In OutBadminton Club12 Courts Stdy 7.20 50%50% 860%08625%220%0641111003232Warehouse (removed)-23.000 KSF 150 1.74 50%50% -400%0-400%00%0 -40 0 0 0 0 -20 -20Totals460 46220 24 11 11 0 0 12 12
A - 7
Badminton AmericaGTC #18-130Trip Generation for: Weekday, Peak Hour of Adjacent Street Traffic, One Hour between 4 and 6 PM(a.k.a.): Weekday PM Peak HourNET EXTERNAL TRIPS BY TYPEIN BOTH DIRECTIONS DIRECTIONAL ASSIGNMENTSGross TripsInternalCrossoverTOTAL PASS-BYDIVERTED LINKNEW PASS-BYDIVERTED LINKNEWLAND USES VARIABLEITE LU codeTripRate%IN%OUTIn+Out(Total)% ofGrossTripsTripsIn+Out(Total)In+Out(Total)% ofExt.TripsIn+Out(Total)% ofExt.TripsIn+Out(Total)In+Out(Total)In Out In Out In OutBadminton Club12 Courts Stdy1.00 92%8% 12 0% 0 12 25% 3 0% 0 9 3 0 0 0 8 1Warehouse (removed)-23.000 KSF 1500.19 27%73% -4 0% 0 -4 0% 0 0% 0 -4 0 0 0 0 -1 -3Totals80830530007-2A - 8