TIA.pdfDATE: December 6, 2012
TO: Bertrand Hauss, P.E.
City of Edmonds
FROM: Chris Forster, P.E.
TENW
SUBJECT: Traffic Impact Analysis
McDonald's - 10124 Edmonds Way - Edmonds, WA
TENW Proiect No. 4661
Transportation Engineering NorthWest
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This memorandum documents the traffic impact analysis completed for the proposed McDonald's - 10124
Edmonds Way project. This traffic analysis includes a trip generation estimate, traffic volume forecasts, site
access operations analysis, collision history, and sight distance assessment.
Exec, o.,t live Summary
Proposal. The project is proposed to replace the existing 3,455 square foot (sf) McDonald's with drive-
through with a new 4,185 sf McDonald's with drive-through. Site access would be provided at two of the
existing site driveways: the existing West (full -access) driveway and the existing East driveway, which is
proposed to remain signed as right -turn only for exiting traffic but be widened to allow entering traffic. The
existing middle (full -access) site driveway would be eliminated as part of the proposed project. The project
is expected to be completed and occupied in 2013.
Trip Generation. The proposed project is estimated to generate 181 net new weekday daily trips, with 17
net new trips occurring during the weekday AM peak hour (9 entering, 8 exiting), and 12 net new trips
during the weekday PM peak hour (6 entering, 6 exiting).
Access Analysis. The existing site driveways are expected to operate at acceptable levels with the
proposed project. No apparent safety issues exist at the proposed driveway locations based on available
collision data and adequate sight distance is available at both driveways. Maintaining the right -turn only
sign for traffic exiting at the proposed east driveway will help to ensure efficient driveway operations.
Separate left- and right -turn lanes are not needed at either driveway to maintain acceptable LOS.
Mitigation. Based on our findings, the proposed project would not have a significant adverse impact on
the transportation system, and the driveways are expected to operate safely and efficiently. The payment of
transportation impact fees will adequately mitigate project impacts by funding the project's fair share of the
cost of the City of Edmond's planned transportation improvements. As shown on the City's Traffic Impact
Analysis Worksheet, the calculated net impact fee for this project is $19,081 .15 ($46,997.55 proposed
minus $27,916.40 existing). The worksheet will be provided with this Traffic Impact Analysis.
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816 - 61h Street South, Kirkland, WA 98033 j Office (425) 889-6747
Traffic Impact Analysis -McDonald's - 10124 Edmonds Way
jY..tI-YOduciIon
The following items are addressed in this traffic impact analysis:
a Project description
® Trip generation
® Traffic volume forecasts
a Site access analysis including:
o LOS & Queues
o Collision history
o Intersection and stopping sight distance
The existing McDonald's is located at 10124 Edmonds Way (SR -104) in Edmonds, Washington (see
Figure 1). The project is proposed to replace the existing 3,455 square foot (sf) McDonald's with drive-
through with a new 4,185 sf McDonald's with drive-through. Site access would be provided at two of the
existing site driveways: the existing West (full -access) driveway and the existing East driveway, which is
proposed to remain signed as right -turn only for exiting traffic but be widened to allow entering traffic. The
existing middle (full -access) site driveway would be eliminated as part of the proposed project. The project
is expected to be completed and occupied in 2013. A preliminary site plan is provided in Figure 2.
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The weekday daily, AM, and PM peak hour trip generation estimates for the proposed McDonald's were
based on the trip rates published in the Institute of Transportation Engineers (ITE) Trip Generation manual,
9th edition for Land Use Code (LUC) 934 (Fast -Food with Drive -Through).
The trip generation estimates for the existing and proposed McDonald's account for pass -by trips. Pass -by
trips are trips that are made by vehicles that are already on the adjacent streets and make intermediate
stops at the restaurant on route to a primary destination (i.e. on the way from work to home). The pass -by
trips for the existing and proposed McDonald's were based on methodology and studies documented in the
ITE Trip Generation Handbook, 2nd Edition, 2004.
The net new trips from the proposed development were calculated by subtracting the trips estimated from
the existing McDonald's to be demolished from the proposed McDonald's. The net new weekday daily,
AM, and PM peak hour trip generation estimates are summarized in Table 1 . The detailed trip generation
calculations are included in Appendix A.
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Traffic Impact Analysis - McDonald's - 10 124 Edmonds Way
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Figure 1: Project Site Vicinity
December 6, 2012
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Traffic Impact Analysis - McDonald's - 10 124 Edmonds Way
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N',,. Note: Site plan provided by Pacland on 10129/12.
Figure 2: Preliminary Site Plan
%P fR,,lW December 6, 2012
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Taf'tNeI
Mr.;Dondd's Edirnar°rds
Trap Generaflon Sunirnary
Time Period
Weekday Daily
Proposed McDonald's
Less existing McDonald's
Net New Weekday Daily Trips
Weekday AM Peak Hour
Proposed McDonald's
Less existing McDonald's
Net New AM Peak Hour Trips
Weekday PM Peak Hour
Proposed McDonald's
Less existing McDonald's
Net New PM Peak Hour Trips
Traffic Impact Analysis -McDonald's - 10124 Edmonds Way
Trips Generated
In Out Total
519
519
1,038
-429
-428
-857
90
91
181
50
47
97
-41
-39
-80
9
8
17
35
33
68
-29
-27
-56
6
6
12
As shown in Table 1, the proposed project is estimated to generate 181 net new weekday daily trips, with
17 net new trips occurring during the weekday AM peak hour (9 entering, 8 exitingl, and 12 net new trips
occurring during the weekday PM peak hour (6 entering, 6 exiting).
ficiffic', Volumes Foreccisls
Weekday AM peak hour traffic counts were collected at the three existing site driveways on Thursday,
November 15, 2012, and weekday PM peak hour traffic counts were collected at the site driveways on
Wednesday, November 14, 2012 by All Traffic Data, Inc. The existing traffic volumes represent the
highest hour between 7:00 and 9:00 AM and 4:00 and 6:00 PM. The 2012 existing AM and PM peak
hour traffic volumes at the three existing site driveways are shown in Figure 3. The detailed traffic counts
are summarized in Appendix B.
It should be noted that the summary of the existing traffic volumes at the site driveways showed that the AM
and PM peak hour volumes at the existing McDonald's were relatively consistent with the ITE -estimated trip
generation for the existing site (within 10%). The trip generation credit for the existing site as shown in
Appendix B was based on using the ITE rates.
Year 2013 without -project baseline traffic volumes were estimated by applying a 2 percent annual growth
rate to the existing through volumes on Edmonds Way and including trips associated with the Walgreens —
Edmonds Way pipeline project (as directed by the City). The future 2013 without -project AM and PM
peak hour traffic volumes at the site driveways are shown in Figure 4.
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Traffic Impact Analysis -McDonald's - 10124 Edmonds Way
ImEdi nor ids Way/West Dwy
(6) (0) (6)
3(1A?)
(67) (2) I 17)
4— 401 (921)
12 0 0
380 (8111)
�d 1s Way
(4 7) 13
35 (2,5)
(27) 4
13 0 23
(9) (2) (22)
(771) 559 --- )P
5 0 3
2 0
z ( ) ( )3) (
(23)31 --A
q
Edmonds Way/Middle Dwy
(6) (0) (6)
'k-- 4 (15)
0 0 1
4— 401 (921)
g— 12 (7)
�d 1s Way
(4 7) 13
(781) 564 ----
13 0 23
(9) (2) (22)
(795) 587
0 28
(1) (25)
Figure 3: Existing Peak Hour Traffic Volumes
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Edmonds Way/East Dwy
2
415 (934)
(14) 1
(795) 587
0 28
(1) (25)
I LEGEND I
UExisting Site Diivoway
t
XX AM Peak Hour "traffic: Volurne$
(XX) PM Peak Hour Traffic Volurnes
%PTE[,1W December 6, 2012
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<
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Traffic Impact Analysis - McDonald's - 10 124 Edmonds Way
Edmonds Way/West Dwy
(67) (2) (17) 3 (15)
12 0 0 -4-- 392 (899)
35 (25)
F111,111,1111, Wov
(27) 4 5 0 3
(797) 570
(2) (0) (3)
(23) 31
4
Edmonds Way/Middle Dwy
'C' ( D
L 4
(6) F
0) 6) (15)
;� 1 5)
0 1 413 (939)
1 (9 19)
12 (7)
trLnonI' W"Y
47) 13-1
(801) 15/5 --- )- 13 0 23
(9) (2) (22)
(111
Edmonds Way/East Dwy
42/ (953)
Vv"Y
14) 1
(815) 599 9 6
0 28
, (1) (25)
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LEGEND
Existing Site Driveway
xx AM Peak Fiooi Traffic Volurnes
(XX) PM Peak Hour Traffic Volumes
Figure 4: 2.013 Without -Project Peak Hour Traffic Volumes
December 6, 2012
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Traffic Impact Analysis - McDonald's - 10124 Edmonds Way
Based on the distribution of the existing site trips and volumes on Edmonds Way, the AM and PM peak
hour net new and pass -by project trips were assigned to the two proposed site driveways. At the east
driveway, the existing right -turn only sign for exiting traffic was assumed to be maintained. Therefore, all
left -turns exiting the site were assumed to use the west driveway. The total gross (net new plus pass -by) AM
and PM peak hour trip assignments at the site driveways are shown in Figure 5. The numbers shown in
Figure 5 do not account for credit for the existing McDonald's trips.
Future 2013 with -project traffic volumes were estimated by removing the trips associated with the existing
McDonald's (net and pass -by) and then adding the trip assignment (net and pass -by) from the proposed
McDonald's to the year 2013 without -project volumes. The resulting 2013 with -project AM and PM peak
hour traffic volumes at the two site driveways are shown in Figure 6.
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Traffic Impact Analysis -McDonald's - 10124 Edmonds Way
IN. Edmonds Way/West Dwy
(2)
0
-4— 14 (-11)
46
K— (31)
7e9mon<ts —Way
s ) t r
24) 31
24 0 (13
(12) 2) 1
(
(29) 37
Figure 5: Project Trip Assignment
Edmonds Way/East Dwy
-,K— 32 (20)
Ar- 12 (8)
T -117.11,119s _wlw
14) -20 56
(41)
1) 2
LEGEND
N
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Future Site Driveway
xx AM Peak Hour Trip Assignment (97 in 93 out)
(XX) I'M Peak Hour Trip Assignment (71 in 66 out)
Note: Project trips shown Include all trips Including pass -by
trips and do not account for credit kw the existing
McDonald's
December 6, 2012
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Traffic Impact Analysis -McDonald's - 10124 Edmonds Way
Edmonds Way/West Dwy
(8)
2
3 (15)
(67) (2) (17)
12 (8)
12 0 0
377 (887)
(796) 580
g— 46'®x(31)
Y
(217) 4
(792) 565
24 0) (�3
(12) (2 1
(29) 37
Edmonds Way/East Dwy
(8)
2
424 (950)
12 (8)
W,,y
14) 1
(796) 580
56
(41)
(1) 2 ---
Figure 6: 2013 With -Project Peak Hour"rraffic Volumes
LEGEND
N
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Future Site Diivewoy
xx AM Peak flour Traffic,
(XX) PM Peak Hour Traffic Volumes
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Traffic Impact Analysis - McDonald's - 10124 Edmonds Way
<) k,., Access i lctNysis
LOS/Queue Analysis
The level of service (LOS) and queue analyses at the site driveways were conducted using the methodology
and procedures outlined in the 2000 Highway Capaci/y Manua/ (HCM) Special Report 209,
Transportation Research Board. The HC52000software package was used to determine the reported LOS
and queues.
Level of service (LOS) serves as an indicator of the quality of traffic flow and degree of congestion at an
intersection or roadway segment. It is a measure of vehicle operating speed, travel time, travel delays, and
driving comfort. The LOS criteria for stop -controlled intersections are based on the delay reported for each
movement and therefore do not represent the overall operations of the intersection. The reported queues
are 95th percentile queues. The estimated 95th percentile queues are exceeded only 5 percent of the time
during the analysis period.
Tables 2 and 3 summarize the results of the LOS/queue analysis for 2012 existing and future 2013
conditions at the site driveways. The LOS and queue calculation sheets are included in Appendix C.
TaNe
201AM a ind PM Peak Itl°°1awr Site Access LOS am°d Queue Summary
2012 Existing Conditions
Time Period / Site Driveway
LOS'
Delay (sec)
Queue (ft)2
AM Peak
# 1 Edmonds Way / West Driveway
NB Shared Left -Right (exiting)
C
17.4
<25'
WB Left (entering)
B
10.2
<25'
#2 Edmonds Way / Middle Driveway
NB Shared Left -Right (exiting)
C
15.5
<25'
WB Left (entering)
A
9.8
<25'
#3 Edmonds Way / East Driveway
NB Right (ewtrng�
B
11.9
<25'
PM Peak
#1 Edmonds Way/ West Driveway
NB Shared Left -Right (exiting)
C
19.6
<25'
WB Left (entering)
B
10.6
<25'
#2 Edmonds Way / Middle Driveway
NB Shared Left-Thru-Right (exiting)
C
17.3
<25'
WB Left (entering)
A
9.6
<25'
#3 Edmonds Way / East Driveway
NB Right (exiting) B 11.9 <25'
LOS = Level of Service, reported by movement for unsignalized intersections.
2 Queues are 9511 Percentile queues. <25' indicates 95th Percentile queue statistically less than 1 vehicle.
4( ( December 6, 2012
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Traffic Impact Analysis - McDonald's- 10124 Edmonds Way
Tak.)de 3
F�.ttture 2013 AM ar'W PM Peak iour Site Access S and Qw. etje Suur�nr�nr°.iry
#3 Edmonds Way / East Driveway
NB Right (exiting) B 12.1 <25' B 11.8 <25'
WB Left (entering) - -- - A 9.8 <25'
LOS = Level of Service, reported by movement for unsignalized intersections.
2 Queues are 951h Percentile queues. <25' indicates 951h Percentile queue statistically less than 1 vehicle.
The results of the unsignalized HCM LOS and queue analysis shown in Tables 2 and 3 show that the
controlled movements at the site driveways currently operate at acceptable levels (LOS C or betters and
would remain at acceptable levels (LOS C or better] during the AM and PM peak hours in 2013 without or
with the proposed project. Project traffic would result in delay increases of less than 5 seconds per vehicle
compared with existing/baseline driveway operations. The HCM results show 95th percentile queues that
are all statistically less than 1 vehicle (25 feet.
The results of the LOS and queue analysis indicate that separate exiting left- and right -turn lanes at the either
driveway are not needed to maintain acceptable operations.
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2013 Without Project
2013 With Project
Delay
Queue
Delay
Queue
Time Period / Site Driveway .._._........m ..........
_.. _
LOS1.....
.. (sec)
(it)2
LOST
(sec)
(ft)2
AM Peak
# 1 Edmonds Way / West Driveway
NB Shared Left -Right (exiting)
C
17.7
<25'
C
20.2
<25'
WB Left (entering)
B
10.3
<25'
B
10.4
<25'
#2 Edmonds Way / Middle Driveway
NB Shared Left -Right (exiting)
C
15.7
<25'
-
-
-
WB Left (entering)
A
9.8
<25'
--
-
#3 Edmonds Way / East Driveway
NB Right (exiting)
B
12.0
<25'
B
12.2
<25'
WB Left (entering
µ
-
A
9.9
<25
PM Peak
# 1 Edmonds Way / West Driveway
NB Shared Left -Right (exiting)
C
20.2
<25'
C
24.5
<25'
WB Left (entering)
B
10.7
<25'
B
10.8
<25'
#2 Edmonds Way / Middle Driveway
NB Shared Left-Thru-Right (exiting)
C
17.7
<25'
-
-
-
WB Left (entering)
A
9.6
<25'
-
-
#3 Edmonds Way / East Driveway
NB Right (exiting) B 12.1 <25' B 11.8 <25'
WB Left (entering) - -- - A 9.8 <25'
LOS = Level of Service, reported by movement for unsignalized intersections.
2 Queues are 951h Percentile queues. <25' indicates 951h Percentile queue statistically less than 1 vehicle.
The results of the unsignalized HCM LOS and queue analysis shown in Tables 2 and 3 show that the
controlled movements at the site driveways currently operate at acceptable levels (LOS C or betters and
would remain at acceptable levels (LOS C or better] during the AM and PM peak hours in 2013 without or
with the proposed project. Project traffic would result in delay increases of less than 5 seconds per vehicle
compared with existing/baseline driveway operations. The HCM results show 95th percentile queues that
are all statistically less than 1 vehicle (25 feet.
The results of the LOS and queue analysis indicate that separate exiting left- and right -turn lanes at the either
driveway are not needed to maintain acceptable operations.
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Traffic Impact Analysis - McDonald's - 10124 Edmonds Way
Collision Histo
Based on collision data provided by the Washington State Department of Transportation (WSDOT), there
were a total of three reported collisions that appear to have occurred at the existing McDonald's driveways
on Edmonds Way within the most recent 3 year period (January 1, 2009 through December 31 , 201 1).
All three collisions involved a northbound left -turn vehicle exiting the McDonald's middle driveway versus a
through vehicle on Edmonds Way. Two of the three collisions involved through vehicles travelling
westbound on Edmonds Way and one collision involved a through vehicle travelling eastbound on
Edmonds Way. All 3 collisions occurred at the Middle Driveway which is being eliminated with this
project. Since only 3 collisions have occurred at the McDonald's driveways over the most recent 3 year
period (none of which occurred at the 2 proposed driveway locations) there does not appear to be a clear
safety issue that needs to be addressed with this project. The collision data in the vicinity of the project site
as provided by WSDOT is included in Appendix D.
Sight Distance
Intersection sight distances and stopping sight distances at the location of the proposed east and west
driveways on Edmonds Way were field verified by TENW on November 15, 2012. Intersection sight
distances were evaluated based on standards in the WSDOT Design Manua/section 1310.09. Stopping
sight distances were evaluated based on standards in Design Manua/ section 1260.04. The posted
speed limit on Edmonds Way at the project site is 35 miles per hour (mph). For this assessment we used a
design speed of 40 mph.
/nlerseclion Sight Distance
For a 40 mph design speed on Edmonds Way, the recommended value for intersection sight distance was
calculated to be 500 feet (Design Manua/ Exhibit 1310-27a). This assumes a vehicle making a left -turn
from the site driveway and crossing 3 lanes (2 eastbound lanes and a center two-way left -turn lane). This is
a conservative assumption since exiting left -turn vehicles will be able to use the center two-way left -turn lane
as refuge and would typically only be required to cross 2 lanes.
At the west driveway, we confirmed that over 500 feet of intersection sight distance is available looking to
the east and to the west. Therefore, intersection sight distance standards are met at the west driveway.
At the east driveway, over 500 feet of intersection sight distance is available looking to the west. Looking
to the east, the available intersection sight distance was measured to be approximately 460 feet, limited by
a horizontal curve in the vicinity of the intersection of Edmonds Way/ 100ft' Ave W. Based on the current
proposal to maintain the right -turn only sign for traffic exiting at the east driveway, the intersection sight
distances at the east driveway are acceptable. If an occasional vehicle turns left from the east driveway,
they would likely utilize the center two-way left -turn lane and would therefore not be required to yield to
westbound through vehicles on Edmonds Way.
Our evaluation of intersection sight distances assumes that no new sight obstructions will be placed within
the sight triangles along the project frontage with the proposed project. Current views looking west and
east on Edmonds Way from the proposed driveway locations are shown in the photos below.
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Traffic Impact Analysis - McDonald's - 10124 Edmonds Way
View looking west from the McDonald's west driveway on Edmonds Way
View looking east from the McDonald's west driveway on Edmonds Way
N,,, December 6, 2012
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Traffic Impact Analysis -McDonald's - 10124 Edmonds Way
View looking west from the McDonald's east driveway on Edmonds Way
View looking east from the McDonald's east driveway on Edmonds Way
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