HomeMy WebLinkAboutEX_22_RS_Traffic_Study_Addendum_240607_v1
STRIDE Bus Rapid Transit
South Renton Transit Center (SRTC) Site Plan Review, Conditional Use Permit, Master Site
Plan Review, and Lot Line Adjustment Application
Attachment 36b
Traffic Study Addendum
June 2024
Prepared by the
CUD 5 – Traffic Analysis for Transit Access to South Renton Transit Center
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Technical Memorandum
DATE: Tuesday, September 20, 2022
PROJECT: GEC CUD 5
TO: Sound Transit
FROM: HDR (Zhuojin Wang, Robert Acevedo)
SUBJECT: Traffic Analysis for Transit Access to South Renton Transit Center
1. Introduction
The new South Renton Transit Center (SRTC) is proposed to be constructed at the northeast corner of
the Grady Way and Rainer Avenue intersection. This project is part of the I-405 Stride Bus Rapid Transit
(BRT) program. The new BRT service and the majority of local buses will access the SRTC via the
intersection of Hardie Avenue and Rainier Avenue, which is the main access point of SRTC. The Hardie
Avenue and Rainier Avenue intersection is currently unsignalized and will be signalized when the transit
center is completed. The Rainier Avenue South median will be modified and pedestrian crosswalks will
be added.
Figure 1 shows the transit center location and proposed geometry at the intersection of Hardie Avenue
and Rainier Avenue at 30% design. In this design, eastbound Hardie Avenue is right turn only at Rainier
Avenue and buses approaching from the north make a southbound left turn from Rainier Avenue into
the SRTC.
Sound Transit is seeking an alternate route that allows the buses coming from eastbound 7th Street to
make a right turn onto Hardie Avenue and go through the intersection from Hardie Avenue to SRTC. This
would change the eastbound Hardie Avenue approach at Rainier Avenue to be a right turn lane shared
with through buses. A separate bus through lane may not be feasible due to geometry constraints.
Figure 1 shows the two options of bus access routes to SRTC.
The purpose of this tech memo is to document the evaluation of transit and traffic operation at the
intersections near the SRTC and compare the bus operation under different access and geometry
options at the Hardie Avenue and Rainier Avenue intersection.
11/13/2024
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Figure 1: SRTC Location and Bus Access Options with Option 1 and 2 Intersection Geometry
2. Study Intersections
Three intersections were identified as study intersections, listed below:
· 7th Street & Hardie Avenue
· 7th Street & Rainier Avenue
· Hardie Avenue & Rainier Avenue
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The analysis is based on the 2026 opening year traffic volumes developed from South Renton Transit
Center Traffic Operations and Concept Validation Summary Memo dated August 2021.
Three options of the bus operation at the intersection of Hardie Avenue and Rainier Avenue were
evaluated in this study. Option 1 assumes the same geometry as 30% design plan, as shown previously
in Figure 1. All buses coming from the north would access the transit center by making a southbound
left turn on Rainier Avenue at Hardie Avenue. Eastbound Hardie Avenue would be right turn only.
Option 2 assumes the buses traveling along eastbound 7th Street would turn right onto Hardie Avenue
and access the transit center by making a through movement across Rainier Avenue. In both options all
other buses accessing the transit center from the north would use the proposed southbound bus-only
left turn lane at the Hardie Avenue and Rainier Avenue intersection. Due to the existing geometry
constraint, eastbound Hardie Avenue is not wide enough to provide a separate through lane used for
bus only. The buses going through would share the lane with right turning vehicles. Option 3 assumes
the same bus access route as Option 1 but the right turn lane location on Hardie Avenue would be the
same as the existing condition. Figure 2 shows the proposed geometry at the Hardie Avenue and Rainier
Avenue intersection in Option 3.
Figure 2: Option 3 Intersection Geometry
Signal phasing would be similar in all three options at the Hardie Avenue and Rainier Avenue
intersection. Eastbound and westbound approaches will use split phasing in all options. In Option 2,
eastbound right turns will run simultaneously with the bus-only eastbound through movement. In
Option 3, the eastbound right turn movement would be signalized and run on its own signal phase
(Phase 3). The southbound left turn could overlap with eastbound right turn in this option. The
southbound left turn could be serviced twice in the signal cycle.
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Traffic volumes and signal phasing for Option 1 and Option 2 are shown in Figure 3 and Figure 4,
respectively. Traffic volumes for Option 3 will be the same as Option 1 and signal phasing for Option 3
was shown previously in Figure 2. Option 1 and Option 3 estimate 44 peak hour buses in the AM and 51
in the PM making a southbound left turn from Rainier Avenue into the transit center. Option 2 estimates
10 buses on eastbound 7th Street in the AM and PM making a right turn onto southbound Hardie Avenue
and going through from Hardie Avenue into the transit center. The remaining 34 buses in the AM and 41
buses in the PM would make a southbound left turn from Rainier Avenue into the transit center, as they
would with other two options. In Options 1 and 2, pedestrians crossing Rainier Avenue at the Hardie
Avenue intersection would use Phase 8, concurrent with the westbound vehicle phase (buses leaving
the transit center).
Figure 3: Estimated 2026 Traffic Volumes and Signal Phasing in Option 1
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Figure 4: Estimated 2026 Traffic Volumes and Signal Phasing in Option 2
Alternative signal phasing in Option 2 and Option 3 has the eastbound traffic running simultaneously
with pedestrian crossing phases on both south and north legs. Westbound buses would run on an
exclusive phase. Option 2 Alternative option also allows eastbound left turn movement from Hardie
Avenue. Figure 5 and Figure 6 shows the alternative signal phasing in Option 2 and Option 3,
respectively. The Alternative Option 2 would increase the pedestrian conflicts with heavy right turning
movement while Option 3 eliminates the conflicts between vehicles and pedestrians.
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Figure 5: Alternative Signal Phasing in Option 2
Figure 6: Alternative Signal Phasing in Option 3
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3. Traffic Analysis
Traffic volumes and signal phasing were input into Synchro models for traffic analysis. Based on the
traffic volumes, 120-second and 150-second cycle length is assumed for three study intersections in the
AM and PM peak hour, respectively, for 2026 study year. The new Hardie Avenue and Rainier Avenue
intersection will be coordinated with the 7th Street and Rainier Avenue intersection.
In Options 1, 2 and 3, pedestrian crossings on both north and south legs at the Hardie Avenue and
Rainier Avenue intersection use signal Phase 8 which runs concurrently with westbound buses in Phase
4. Buses exiting from the transit center must yield to pedestrians when making turns at the intersection.
To improve pedestrian safety when crossing Rainier Avenue, a leading pedestrian interval (LPI) of 3
seconds could be beneficial. LPI allows pedestrians to enter the crosswalk prior to the start of vehicular
phases, which results in them being more visible to auto drivers. LPI is assumed in the analysis
documented in this tech memo.
In addition, the westbound right turn bus lane is not adjacent to the crosswalk on the north leg,
additional “yield to pedestrian” signs or flashing yellow indication of signal head might be used to
emphasize the yield movement of right turning buses. In Option 3 Alternative Signal Phasing, pedestrian
phases are running concurrently with eastbound right turning vehicles. This signal phasing is likely to
provide the best condition for pedestrian safety.
Appendix A contains detailed Synchro results at the study intersections. Table 1 shows a comparison of
intersection delays and LOS for all options. The intersection delays and LOS are similar in all options.
Table 1: Intersection Delays and LOS in Three Options
Intersection 7th St & Hardie Ave Hardie Ave & Rainier Ave 7th St & Rainier Ave
Option Time Delay (sec/veh) LOS Delay (sec/veh) LOS Delay (sec/veh) LOS
Option 1 AM 15.5 B 22.8 C 28.5 C
PM 25.9 C 29.1 C 56.9 E
Option 2 AM 15.5 B 24.0 C 29.1 C
PM 25.8 C 23.8 C 53.8 D
Option 2
Alternative
AM 15.3 B 28.2 C 31.0 C
PM 25.8 C 26.8 C 54.4 D
Option 3 AM 15.5 B 21.5 C 28.7 C
PM 25.9 C 20.7 C 57.0 E
Option 3
Alternative
AM 15.4 B 29.4 C 26.3 C
PM 25.9 C 25.4 C 54.7 D
Table 2 shows a comparison of bus movement delays and level-of-service (LOS). Total bus delay is the
sum of all the bus delays at three intersections. Southbound and westbound bus delays at the 7th Street
and Hardie Avenue intersection are excluded as the bus delays should be the same in all options. Table 3
shows the estimated individual BRT and local bus travel time and total bus travel time to access the
transit center. BRT travel time is estimated from the 7th Street and Hardie Avenue intersection to transit
center, and local bus travel time is estimated from the 7th Street and Rainier Avenue intersection to
transit center. Synchro/SimTraffic is not capable of provide vehicle travel time as a direct output. The
travel time shown in the table is the sum total of the estimated running time between intersections with
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assumed 25 mph bus travel speed, 10 second acceleration/deceleration time for bus at each
intersection, and delays at signalized intersection.
Table 2: Bus Movement Delays by Option
Option 1
Intersection Movement
AM PM
Delay
(sec)
Num. of Buses
(veh)
Delay
(sec)
Num. of Buses
(veh)
7th St & Hardie Ave EBT 7.7 10 17.9 10
7th St & Rainier Ave EBR 29.2 10 111.9 10
Hardie Ave & Rainier Ave SBL 83.9 44 102.5 51
Hardie Ave & Rainier Ave WBL/T/R 41.6 63 57.9 56
Total (min) 111.4 162.8
Option 2
Intersection Movement
AM PM
Delay
(sec)
Num. of Buses
(veh)
Delay
(sec)
Num. of Buses
(veh)
7th St & Hardie Ave EBR 7.3 10 17.8 10
Hardie Ave & Rainier Ave EBT 31.8 10 48.1 10
Hardie Ave & Rainier Ave SBL 89.4 34 109.5 41
Hardie Ave & Rainier Ave WBL/T/R 41.9 63 58.2 56
Total (min) 101.2 140.1
Option 2 - Alternative Signal Phasing
Intersection Movement
AM PM
Delay
(sec)
Num. of Buses
(veh)
Delay
(sec)
Num. of Buses
(veh)
7th St & Hardie Ave EBR 7.3 10 17.8 10
Hardie Ave & Rainier Ave EBT 34.8 10 50.4 10
Hardie Ave & Rainier Ave SBL 108.4 34 103.2 41
Hardie Ave & Rainier Ave WBL/T/R 81.4 63 95.3 56
Total (min) 153.9 170.8
Option 3
Intersection Movement
AM PM
Delay
(sec)
Num. of Buses
(veh)
Delay
(sec)
Num. of Buses
(veh)
7th St & Hardie Ave EBT 7.7 10 17.9 10
7th St & Rainier Ave EBR 29.2 10 111.9 10
Hardie Ave & Rainier Ave SBL 33.5 44 37.9 51
Hardie Ave & Rainier Ave WBL/T/R 41.6 63 57.9 56
Total (min) 74.4 107.9
Option 3 - Alternative Signal Phasing
Intersection Movement
AM PM
Delay
(sec)
Num. of Buses
(veh)
Delay
(sec)
Num. of Buses
(veh)
7th St & Hardie Ave EBT 7.7 10 17.9 10
7th St & Rainier Ave EBR 29.2 10 111.9 10
Hardie Ave & Rainier Ave SBL 119.4 44 95.5 51
Hardie Ave & Rainier Ave WBL/T/R 84.7 63 89.5 56
Total (min) 182.6 186.3
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Table 3: Individual and Total Bus Travel Time
Option
AM PM
BRT Travel
Time
(min)
Local Bus
Travel Time
(min)
Total Travel
Time
(min)
BRT Travel
Time
(min)
Local Bus
Travel Time
(min)
Total Travel
Time
(min)
Option 1 2.7 1.7 86.1 4.5 2.1 129.6
Option 2 1.0 1.8 72.5 1.4 2.2 103.6
Option 2 - Alterntaive 1.0 2.2 83.8 1.5 2.1 99.6
Option 3 1.8 0.9 49.1 3.5 1.0 74.7
Option 3 - Alternative 3.3 2.3 112.1 4.4 1.9 123.7
Total Num. of Buses 10 34 10 41
As shown in Table 2 and Table 3, in Option 1, buses are expected to experience major delays when
making eastbound right turn at the Rainier Avenue and 7th Street intersection and making southbound
left turn at the Rainier Avenue and Hardie Avenue intersection. Vehicles are expected experience 1.9
minutes of delay to turn right from 7th Street to Rainier Avenue during the PM peak hours. The
southbound left turning buses are expected to wait approximate 1.5 minutes at the Hardie Avenue and
Rainier Avenue intersection during and AM and PM peak hours. In option 1, buses travelling eastbound
along 7th Street through the three study intersections to the transit center are anticipated to take 2.7
minutes during the AM peak hour and 4.5 minutes during the PM peak hour.
In Option 2, southbound left turning buses would also experience long delays at Hardie Avenue and
Rainier Avenue intersection, comparable to Option 1. However, the buses going eastbound experience
less delays as compared to the southbound left turning buses. Buses travelling along eastbound 7th
Street are expected to take 1.0 minutes and 1.4 minutes during the AM and PM peak hours,
respectively, to pass two intersections before reaching the transit center, which is much less travel time
for BRT as compared to other options. But the BRT bus would share a single lane with other traffic along
Hardie Avenue, and friction between buses and driveways along Hardie Avenue is not captured in this
analysis. When considering all buses, Option 2 would have less total delays than Option 1 but higher
total delays than Option 3 in the AM and PM peak hours.
In Option 2 Alternative Signal Phasing, westbound buses exiting the transit center would experience
longer delays than Option 2. This results from eastbound green time being extended to accommodate
concurrent pedestrian phases while the westbound transit phase is truncated.
In Option 3, southbound left turn delays at the Hardie Avenue and Rainier Avenue intersection are much
lower than other options as this movement could be served twice per cycle. The southbound left turn
runs on its own phase (Phase 1) as well as eastbound right turn phase (Phase 3). Each southbound left
turning bus is expected to save approximate 1 minute of delay as compared to the other options.
Individual BRT travel time in this option is lower than Option 1 but higher than Option 2 due to the
longer travel distance and more total signal delays. However the total bus delays including BRT buses
and local buses will still be less as compared to other options. Therefore, Option 3 would have the least
total bus delays when compared to other options, though the BRT delays are higher than Option 2.
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In Option 3 Alternative Signal Phasing, westbound buses would experience higher delays than with
Option 3 during the AM peak hour. This results from eastbound green time being extended to
accommodate concurrent pedestrian phases while the westbound transit phase is truncated.
Transit Signal Priority (TSP) was not included in this analysis and future conversations or analysis should
be done to determine if TSP can be used for any bus route at the study intersections.
Table 4 summarizes the difference and analysis findings of all scenarios for the Hardie Avenue and
Rainier Avenue Intersection. Sound Transit and City of Renton should determine which option should be
used at this intersection prior to the signal design.
The Grady Way and Rainier Avenue is a congested intersection in particular during the PM peak hour.
SimTraffic simulation was conducted to understand if the queues originating from Grady Way would
extend along Rainier Avenue to Hardie Avenue and 7th Street and block the eastbound right turning
buses at the 7th Street and Rainier Avenue intersection to access the transit center. Traffic conditions at
the Grady Way and Rainier Avenue intersection are similar among all options and Option 3 was selected
for this test. The analysis indicates that the southbound queues from Grady Avenue are generally not
expected to extend beyond Hardie Avenue along Rainier Avenue during the PM peak hour as the
average queues are less than the storage between two intersections. However, for a few cycles within
the PM peak hour only, the southbound queues may spill back beyond Rainier Avenue and reach 7th
Street as the maximum queue lengths reach the storage distance between intersections. Table A-11 in
Appendix A shows the average and maximum queue lengths at the Grady Way and Rainier Avenue
intersection and study intersections.
To reduce southbound queues, the study team recommends changing the southbound right turn lane at
the Hardie Avenue and Rainier Avenue intersection to a shared through and right turn lane. Since the
southbound right turning volumes are very low during both AM and PM peak hours (less than 10
vehicles as shown in Figure 3), converting the right turn lane to be shared with through movement will
increase the southbound capacity along Rainier Avenue and reduce queues on southbound approach,
which will facilitate eastbound right turning buses at 7th Street and Rainier Avenue intersection
accessing the transit center. Figure 7 shows the recommended geometry on southbound Rainier Avenue
approaching Hardie Avenue. There are three receiving lanes south of Hardie Avenue in the existing
condition and the three through lanes would extend to Grady Way and beyond. The existing geometry
along Rainier Avenue would make this change feasible. City of Renton should determine if they would
like to incorporate this lane configuration change as part of this project.
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Figure 7: Recommended Geometry on Southbound Rainier Avenue
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4. Conclusion and Recommendation
The project team analyzed and compared three options at the intersection of Hardie Avenue and Rainier
Avenue. Option 1 and Option 3 assume all inbound buses from the north make a protected southbound
left turn at the Hardie Avenue and Rainier Avenue to access the transit center. Option 2 allows BRT
buses traveling eastbound along 7th Street to access the transit center by crossing Rainier Avenue at the
new Hardie Avenue signal. Option 3 assumes the eastbound right turn lane will be at the same location
as the existing condition. In Option 1 and Option 3, eastbound Hardie Avenue is right turn only while in
Option 2 eastbound Hardie Avenue allows buses to go through. Option 2 Alternative Signal Phasing and
Option 3 Alternative Signal Phasing allows pedestrian phases to run concurrently with eastbound
approach rather than the westbound approach as shown in other options.
The traffic analysis results indicate that BRT buses would have least travel time to access the transit
center in Option 2 due to shorter travel distance and less signalized intersections to go through. Please
note in Option 2 the BRT would share the single lane with other vehicles along Hardie Avenue and
friction between BRT and driveways along Hardie Avenue is not captured in this analysis. Option 3 has
higher BRT travel time as compared to Option 2 but this option has least total bus delays including BRT
and local buses. Buses would experience long delays when making a southbound left turn from Rainier
Avenue to transit center in both Option 1 and Option 2. Option 3 significantly reduces this delay by
overlapping the southbound left turn phase with the eastbound right turn phase, which then allows the
southbound left turning movement to be serviced twice within one signal cycle if necessary. Option 3
Alternative Signal Phasing provides best pedestrian safety; however, this option would have the highest
peak hour bus delays of the options considered.
Table 4 summarizes the difference and analysis findings of all scenarios for the Hardie Avenue and
Rainier Avenue Intersection. Sound Transit and City of Renton should determine which option should be
used at this intersection prior to the signal design.
The Grady Way and Rainier Avenue is a congested intersection in particular during the PM peak hour.
Based on the SimTraffic analysis results, the southbound queues from Grady Avenue generally do not go
beyond Hardie Avenue along Rainier Avenue, however, for a few cycles, the southbound queues have
the potential to spill back beyond Rainier Avenue and reach 7th Street. To reduce southbound queues,
the study team recommends changing the southbound right turn lane at the Hardie Avenue and Rainier
Avenue intersection to a shared through and right turn lane due to low right turn volumes. City of
Renton should determine if they would like to incorporate this lane configuration change as part of this
project.
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Table 4: Comparison and Summary at the Hardie Avenue and Rainier Avenue Intersection
Option
Geometry on
EB Approach Signal Phasing
Can buses
go through
in EB?
Can EBLT
be
allowed?
BRT
Travel
Time
Total Bus
Delays
Pedestrian
Safety
1
EB lane at
intersection · EB/WB ped phases run with WB buses No No High Median Median
2
EB lane at
intersection · EB/WB ped phases run with WB buses Yes Yes Low Median Median
2
Alternative
EB lane at
intersection · EB/WB ped phases run with EB traffic Yes Yes Low
Median-
High Low
3
EB lane at
existing location
· EB/WB ped phases run with WB buses
· SBLT phase serviced twice in a cycle No No
Median-
High Low Median
3
Alternative
EB lane at
existing location · EB/WB ped phases run with EB traffic No No High High High
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APPENDIX A: SYNCHRO RESULTS
Table A-1: Option 1 – 2026 AM
Int ID Intersection Name Link Name Movement Length Volume v/c ratio
50th Queue
Length (ft)
95th
Queue
Length
(ft)
Delay LOS
Approach
Delay
Approach
LOS Int. Delay Int. LOS
EBL 51 0.41 41 83 61.3 E
EBT 1402 163 0.12 13 80 7.7 A
EBR 92
WBL 5 0.06 4 m8 65 E
WBT 400 550 0.31 28 286 8.4 A
WBR 51
NBL 2
NBT 557 4 0.04 5 m14 51.2 D
NBR 1 0 0 m0 0 A
SBL 61
SBT 517 46 0.48 85 131 53.1 D
SBR 31 0.1 0 0 0.5 A
EBL 0
EBT 557 0
EBR 154 0.42 5 12 5 A
WBL 12 0.07 8 25 35.6 D
WBT 702 10 0.33 35 75 43 D
WBR 41
NBL 0
NBT 200 1255 0.77 502 #716 33 C
NBR 12 0.03 6 20 22.2 C
SBL 44 0.52 39 m72 83.9 F
SBT 593 709 0.36 62 87 5.3 A
SBR 7 0.01 0 m0 0 A
EBL 134 0.5 58 #103 61.9 E
EBT 400 61 0.22 52 45 29.2 C
EBR 29
WBL 52 0.44 41 86 64.8 E
WBT 583 299 0.71 229 278 49.7 D
WBR 369 0.8 180 255 37 D
NBU 37
NBL 145 0.65 135 m#222 31.7 C
NBT 593 1031 0.73 16 #576 11 B
NBR 48 0.07 0 m0 0.2 A
SBU 5
SBL 111 0.46 48 80 58.4 E
SBT 539 608 0.55 215 298 34.3 C
SBR 162 0.27 0 52 5.7 A
C
7th St 44.3 D
Rainier Ave 13.5 B
Rainier Ave 32.2 C
28.5119 Rainier Ave & 7th St
7th St 48.7 D
C
South Renton
Transit Center 41.6 D
Rainier Ave 32.9 C
Rainier Ave 9.6 A
22.812 Rainier Ave & Hardie Ave
Hardie Ave 5 A
B
7th St 8.9 A
Hardie Ave 43.9 D
Hardie Ave 41.2 D
15.511 Hardie Ave & 7th St
7th St 16.6 B
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Table A-2: Option 1 – 2026 PM
Int ID Intersection Name Link Name
Moveme
nt Volume v/c Ratio
50th
Queue
Length (ft)
95th
Queue
Length (ft)
Delay LOS
Approac
h Delay
Approac
h LOS Int. Delay Int. LOS
EBL 72 66.5 75 128 71.3 E
EBT 632 16.7 201 445 17.4 B
EBR 239
WBL 5 73.8 5 m12 111.1 F
WBT 412 19.6 52 m237 10.2 B
WBR 61
NBL 3
NBT 4 64.1 7 m20 62.1 E
NBR 2 63.9 0 m0 63.9 E
SBL 123
SBT 102 58.1 230 310 68.6 E
SBR 51 50.5 0 0 50.6 D
EBL 0
EBT 0
EBR 356 227 171 156 97.8 F
WBL 12 144 11 31 54 D
WBT 10 134 40 84 57.8 E
WBR 34
NBL 0
NBT 1253 1588 521 m#840 37.8 D
NBR 12 373 7 m9 25.8 C
SBL 51 92 56 m62 98.1 F
SBT 1425 2073 157 m#892 7.6 A
SBR 9 912 0 m0 12.2 B
EBL 356 3 175 #328 50.6 D
EBT 317 3 402 #596 69 E
EBR 83
WBL 100 3 102 #199 89.4 F
WBT 172 3 171 214 62.6 E
WBR 169 0 0 0.1 A
NBL 135 4 ~229 m#312 109.3 F
NBT 973 3 120 61 15.9 B
NBR 77 3 0 m0 6.4 A
SBL 364 3 204 #293 78.3 E
SBT 1197 3 ~714 #855 63.3 E
SBR 171 3 40 99 30.3 C
C
7th St 21.5 C
7th St 11.2 B
Hardie Ave 62.5 E
Hardie Ave 65.3 E
11 Hardie Ave & 7th St 25.9
12 Rainier Ave & Hardie Ave 33.5 C
Hardie Ave 97.8 F
South Renton Transit Center 57 E
Rainier Ave 37.6 D
Rainier Ave 10.6 B
119 Rainier Ave & 7th St 51.0 D
7th St 60.3 E
7th St 44.7 D
Rainier Ave 30.1 C
Rainier Ave 63.3 E
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Table A-3: Option 2 – 2026 AM
Int ID Intersection Name Link Name Movement Length Volume v/c ratio
50th Queue
Length (ft)
95th
Queue
Length
(ft)
Delay LOS
Approach
Delay
Approach
LOS Int. Delay Int. LOS
EBL 51 0.41 41 83 61.3 E
EBT 1402 153 0.12 12 77 7.3 A
EBR 102
WBL 5 0.06 4 m8 65.2 E
WBT 400 550 0.31 28 286 8.4 A
WBR 51
NBL 2
NBT 557 4 0.04 5 m14 53 D
NBR 1 0 0 m0 0 A
SBL 61
SBT 517 46 0.48 85 131 53.1 D
SBR 31 0.1 0 0 0.5 A
EBL 0
EBT 557 10 0.76 11 123 31.8 C
EBR 154
WBL 12 0.11 8 26 37.2 D
WBT 702 10 0.33 35 75 43 D
WBR 41
NBL 0
NBT 200 1255 0.74 494 #735 30.9 C
NBR 12 0.03 6 21 22.8 C
SBL 34 0.5 30 m57 89.4 F
SBT 593 709 0.37 60 90 5.9 A
SBR 7 0.01 0 m0 0 A
EBL 134 0.5 58 #103 62.6 E
EBT 400 61 0.2 50 48 31.3 C
EBR 19
WBL 52 0.44 41 86 64.8 E
WBT 583 299 0.71 229 278 49.7 D
WBR 369 0.8 180 255 37 D
NBU 37
NBL 145 0.65 140 m#239 33.2 C
NBT 593 1031 0.73 16 #576 12.2 B
NBR 48 0.07 0 m0 0.2 A
SBU 5
SBL 111 0.46 48 80 58.4 E
SBT 539 608 0.55 215 298 34.3 C
SBR 162 0.27 0 52 5.7 A
C
7th St 44.3 D
Rainier Ave 14.7 B
Rainier Ave 32.2 C
29.1119 Rainier Ave & 7th St
7th St 50.9 D
C
South Renton
Transit Center 41.9 D
Rainier Ave 30.8 C
Rainier Ave 9.5 A
2412 Rainier Ave & Hardie Ave
Hardie Ave 31.8 C
B
7th St 8.9 A
Hardie Ave 45.4 D
Hardie Ave 41.2 D
15.511 Hardie Ave & 7th St
7th St 16.3 B
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Table A-4: Option 2 – 2026 PM
Int ID Intersection Name Link Name Movement Length Volume v/c ratio
50th Queue
Length (ft)
95th
Queue
Length
(ft)
Delay LOS
Approach
Delay
Approach
LOS Int. Delay Int. LOS
EBL 72 0.56 75 128 80.7 F
EBT 1402 622 0.43 200 444 17.8 B
EBR 249
WBL 5 0.07 5 m12 96.8 F
WBT 400 412 0.27 52 m236 12.2 B
WBR 61
NBL 3
NBT 557 4 0.04 7 m21 52.8 D
NBR 2 0.01 0 m0 0 A
SBL 123
SBT 517 102 0.74 230 310 71.7 E
SBR 51 0.14 0 0 0.8 A
EBL 0
EBT 557 10 0.93 183 243 48.1 D
EBR 356
WBL 12 0.17 11 33 55.6 E
WBT 698 10 0.34 40 84 59 E
WBR 34
NBL 0
NBT 184 1253 0.79 350 m#840 26.2 C
NBR 12 0.03 6 m7 22.6 C
SBL 41 0.6 46 m52 109.5 F
SBT 593 1425 0.78 156 m#907 10.8 B
SBR 9 0.01 0 m0 0 A
EBL 356 0.61 175 #328 53.7 D
EBT 400 317 0.91 386 #571 101.1 F
EBR 73
WBL 100 0.77 102 #199 100 F
WBT 583 172 0.61 171 214 66.2 E
WBR 169 0.11 0 0 0.1 A
NBU 67
NBL 135 1.1 ~229 m#340 111.2 F
NBT 593 973 0.82 74 61 14.1 B
NBR 77 0.13 1 m0 0.5 A
SBU 12
SBL 364 0.86 203 #293 80.9 F
SBT 539 1197 0.96 ~705 #855 63.6 E
SBR 171 0.28 39 99 12.4 B
D
7th St 48.5 D
Rainier Ave 28.6 C
Rainier Ave 62.3 E
53.8119 Rainier Ave & 7th St
7th St 78.5 E
C
South Renton
Transit Center 58.2 E
Rainier Ave 26.2 C
Rainier Ave 13.4 B
23.812 Rainier Ave & Hardie Ave
Hardie Ave 48.1 D
C
7th St 13 B
Hardie Ave 41.1 D
Hardie Ave 58.7 E
25.811 Hardie Ave & 7th St
7th St 22.6 C
CUD 5 – Traffic Analysis for Transit Access to South Renton Transit Center
18
Table A-5: Option 2 – Alternative Signal Phasing - 2026 AM
Int ID Intersection Name Link Name Movement Length Volume v/c ratio
50th Queue
Length (ft)
95th
Queue
Length
(ft)
Delay LOS
Approach
Delay
Approach
LOS Int. Delay Int. LOS
EBL 51 0.41 41 83 61.3 E
EBT 1402 153 0.12 12 77 7.3 A
EBR 102
WBL 5 0.06 4 m8 65 E
WBT 400 550 0.31 28 285 8.4 A
WBR 51
NBL 2
NBT 557 4 0.04 2 m10 26.5 C
NBR 1 0 0 m0 0 A
SBL 61
SBT 517 46 0.48 85 131 53.1 D
SBR 31 0.1 0 0 0.5 A
EBL 10
EBT 557 10 0.8 53 #136 34.8 C
EBR 154
WBL 12 0.22 9 30 56.2 E
WBT 702 10 0.67 42 #101 87.2 F
WBR 41
NBL 0
NBT 200 1255 0.8 ~595 #772 35.6 D
NBR 12 0.03 6 22 25.6 C
SBL 34 0.55 25 m57 108.4 F
SBT 593 709 0.4 48 66 5.9 A
SBR 7 0.01 0 m0 0 A
EBL 134 0.5 58 #103 62.6 E
EBT 400 61 0.2 50 48 31.3 C
EBR 19
WBL 52 0.44 41 86 64.8 E
WBT 583 299 0.71 229 278 49.7 D
WBR 369 0.8 180 255 37 D
NBU 37
NBL 145 0.65 88 m#166 38.2 D
NBT 593 1031 0.73 118 #158 16.9 B
NBR 48 0.07 0 m1 0.6 A
SBU 5
SBL 111 0.46 48 80 58.4 E
SBT 539 608 0.55 215 298 34.3 C
SBR 162 0.27 0 52 5.7 A
11 Hardie Ave & 7th St
7th St 16.3 B
B
7th St 8.9 A
Hardie Ave 22.7 C
Hardie Ave 41.2 D
15.3
12 Rainier Ave & Hardie Ave
Hardie Ave 34.8 C
C
South Renton
Transit Center 81.4 F
Rainier Ave 35.5 D
Rainier Ave 10.3 B
28.2
119 Rainier Ave & 7th St
7th St 50.9 D
C
7th St 44.3 D
Rainier Ave 19.3 B
Rainier Ave 32.2 C
31
CUD 5 – Traffic Analysis for Transit Access to South Renton Transit Center
19
Table A-6: Option 2 – Alternative Signal Phasing - 2026 PM
Int ID Intersection Name Link Name Movement Length Volume v/c ratio
50th Queue
Length (ft)
95th
Queue
Length
(ft)
Delay LOS
Approach
Delay
Approach
LOS Int. Delay Int. LOS
EBL 72 0.56 75 128 80.7 F
EBT 1402 622 0.43 200 444 17.8 B
EBR 249
WBL 5 0.07 5 m12 96.8 F
WBT 400 412 0.27 52 m236 12.2 B
WBR 61
NBL 3
NBT 557 4 0.04 7 m17 50.7 D
NBR 2 0.01 0 m0 0.0 A
SBL 123
SBT 517 102 0.74 230 310 71.7 E
SBR 51 0.14 0 0 0.8 A
EBL 10
EBT 557 10 0.92 287 254 50.4 D
EBR 356
WBL 12 0.32 12 36 81.7 F
WBT 698 10 0.64 46 91 99.0 F
WBR 34
NBL 0
NBT 184 1253 0.78 391 m#840 27.6 C
NBR 12 0.03 5 m8 26.2 C
SBL 41 0.62 46 m53 103.2 F
SBT 593 1425 0.77 202 m#927 14.1 B
SBR 9 0.01 0 m0 0.0 A
EBL 356 0.61 175 #328 53.7 D
EBT 400 317 0.91 386 #571 101.1 F
EBR 73
WBL 100 0.77 102 #199 100.0 F
WBT 583 172 0.61 171 214 66.2 E
WBR 169 0.11 0 0 0.1 A
NBU 67
NBL 135 1.1 ~233 m#355 111.0 F
NBT 593 973 0.82 316 21 15.2 B
NBR 77 0.13 7 m0 0.7 A
SBU 12
SBL 364 0.86 203 #293 80.9 F
SBT 539 1197 0.96 ~705 #855 64.8 E
SBR 171 0.28 39 99 12.4 B
11 Hardie Ave & 7th St
7th St 22.6 C
C
7th St 13 B
Hardie Ave 39.4 D
Hardie Ave 58.7 E
25.8
12 Rainier Ave & Hardie Ave
Hardie Ave 50.4 D
C
South Renton
Transit Center 95.3 F
Rainier Ave 27.5 C
Rainier Ave 16.4 B
26.8
119 Rainier Ave & 7th St
7th St 78.5 E
D
7th St 48.5 D
Rainier Ave 29.4 C
Rainier Ave 63.1 E
54.4
CUD 5 – Traffic Analysis for Transit Access to South Renton Transit Center
20
Table A-7: Option 3 – 2026 AM
Int ID Intersection Name Link Name Movement Length Volume v/c ratio
50th Queue
Length (ft)
95th
Queue
Length
(ft)
Delay LOS
Approach
Delay
Approach
LOS Int. Delay Int. LOS
EBL 51 0.41 41 83 61.3 E
EBT 1402 163 0.12 13 80 7.7 A
EBR 92
WBL 5 0.06 4 m8 65 E
WBT 400 550 0.31 28 286 8.4 A
WBR 51
NBL 2
NBT 557 4 0.04 5 m14 48 D
NBR 1 0 0 m0 0 A
SBL 61
SBT 517 46 0.48 85 131 53.1 D
SBR 31 0.1 0 0 0.5 A
EBL 0
EBT 557 0
EBR 154 0.39 5 12 4.6 A
WBL 12 0.07 8 25 35.6 D
WBT 702 10 0.33 35 75 43 D
WBR 41
NBL 0
NBT 200 1255 0.75 492 #703 31.9 C
NBR 12 0.03 6 20 21.4 C
SBL 44 0.36 33 m60 33.5 C
SBT 593 709 0.38 63 93 6.1 A
SBR 7 0.01 0 m0 0 A
EBL 134 0.5 58 #103 61.9 E
EBT 400 61 0.22 52 45 29.2 C
EBR 29
WBL 52 0.44 41 86 64.8 E
WBT 583 299 0.71 229 278 49.7 D
WBR 369 0.8 180 255 37 D
NBU 37
NBL 145 0.65 141 m#229 32.3 C
NBT 593 1031 0.73 16 #576 11.3 B
NBR 48 0.07 0 m0 0.3 A
SBU 5
SBL 111 0.46 48 80 58.4 E
SBT 539 608 0.55 215 298 34.3 C
SBR 162 0.27 0 52 5.7 A
C
7th St 44.3 D
Rainier Ave 13.9 B
Rainier Ave 32.2 C
28.7119 Rainier Ave & 7th St
7th St 48.7 D
C
South Renton
Transit Center 41.6 D
Rainier Ave 31.8 C
Rainier Ave 7.6 A
21.512 Rainier Ave & Hardie Ave
Hardie Ave 4.6 A
B
7th St 8.9 A
Hardie Ave 41.1 D
Hardie Ave 41.2 D
15.511 Hardie Ave & 7th St
7th St 16.6 B
CUD 5 – Traffic Analysis for Transit Access to South Renton Transit Center
21
Table A-8: Option 3 – 2026 PM
Int ID Intersection Name Link Name Movement Length Volume v/c ratio
50th Queue
Length (ft)
95th
Queue
Length
(ft)
Delay LOS
Approach
Delay
Approach
LOS Int. Delay Int. LOS
EBL 72 0.56 75 128 80.7 F
EBT 1402 632 0.43 201 445 17.9 B
EBR 239
WBL 5 0.07 5 m12 96.8 F
WBT 400 412 0.27 52 m236 12.1 B
WBR 61
NBL 3
NBT 557 4 0.04 7 m20 53.3 D
NBR 2 0.01 0 m0 0 A
SBL 123
SBT 517 102 0.74 230 310 71.7 E
SBR 51 0.14 0 0 0.8 A
EBL 0
EBT 557 0
EBR 356 0.92 171 156 45.7 D
WBL 12 0.09 11 31 50.7 D
WBT 698 10 0.36 40 84 59.8 E
WBR 34
NBL 0
NBT 184 1253 0.74 350 m#810 21.9 C
NBR 12 0.03 5 m7 19.8 B
SBL 51 0.3 48 m52 37.9 D
SBT 593 1425 0.77 157 m#892 10.4 B
SBR 9 0.01 0 m0 0 A
EBL 356 0.59 175 #328 53.4 D
EBT 400 317 0.92 402 #596 111.9 F
EBR 83
WBL 100 0.77 102 #199 100 F
WBT 583 172 0.61 171 214 66.2 E
WBR 169 0.11 0 0 0.1 A
NBU 67
NBL 135 1.1 ~229 m#380 115.5 F
NBT 593 973 0.83 293 59 17.2 B
NBR 77 0.13 5 m0 0.8 A
SBU 12
SBL 364 0.87 204 #293 81.9 F
SBT 539 1197 0.97 ~714 #855 67.5 E
SBR 171 0.28 40 99 12.5 B
E
7th St 48.5 D
Rainier Ave 31.7 C
Rainier Ave 65.2 E
57119 Rainier Ave & 7th St
7th St 84.3 F
C
South Renton
Transit Center 57.9 E
Rainier Ave 21.8 C
Rainier Ave 11.2 B
20.712 Rainier Ave & Hardie Ave
Hardie Ave 45.7 D
C
7th St 12.9 B
Hardie Ave 41.5 D
Hardie Ave 58.7 E
25.911 Hardie Ave & 7th St
7th St 22.7 C
CUD 5 – Traffic Analysis for Transit Access to South Renton Transit Center
22
Table A-9: Option 3 – Alternative Signal Phasing - 2026 AM
Int ID Intersection Name Link Name Movement Length Volume v/c ratio
50th Queue
Length (ft)
95th
Queue
Length
(ft)
Delay LOS
Approach
Delay
Approach
LOS Int. Delay Int. LOS
EBL 51 0.41 41 83 61.3 E
EBT 1402 163 0.12 13 80 7.7 A
EBR 92
WBL 5 0.06 4 m8 65 E
WBT 400 550 0.31 28 286 8.4 A
WBR 51
NBL 2
NBT 557 4 0.04 5 m10 31.2 C
NBR 1 0 0 m0 0 A
SBL 61
SBT 517 46 0.48 85 131 53.1 D
SBR 31 0.1 0 0 0.5 A
EBL 0
EBT 557 0
EBR 154 0.35 7 17 5.6 A
WBL 12 0.14 9 30 50.8 D
WBT 702 10 0.7 42 #101 92.6 F
WBR 41
NBL 0
NBT 200 1255 0.85 ~634 #772 40.7 D
NBR 12 0.04 7 22 26.3 C
SBL 44 0.69 39 m#83 119.4 F
SBT 593 709 0.41 62 82 6.6 A
SBR 7 0.01 0 m0 0 A
EBL 134 0.5 58 #103 61.9 E
EBT 400 61 0.22 52 45 29.2 C
EBR 29
WBL 52 0.44 41 86 64.8 E
WBT 583 299 0.71 229 278 49.7 D
WBR 369 0.8 180 255 37 D
NBU 37
NBL 145 0.65 79 m144 23 C
NBT 593 1031 0.73 16 #32 5.9 A
NBR 48 0.07 0 m0 0.1 A
SBU 5
SBL 111 0.46 48 80 58.4 E
SBT 539 608 0.55 215 298 34.3 C
SBR 162 0.27 0 52 5.7 A
C
7th St 44.3 D
Rainier Ave 8.1 A
Rainier Ave 32.2 C
26.3119 Rainier Ave & 7th St
7th St 48.7 D
C
South Renton
Transit Center 84.7 F
Rainier Ave 40.6 D
Rainier Ave 12.9 B
29.412 Rainier Ave & Hardie Ave
Hardie Ave 5.6 A
B
7th St 8.9 A
Hardie Ave 26.7 C
Hardie Ave 41.2 D
15.411 Hardie Ave & 7th St
7th St 16.6 B
CUD 5 – Traffic Analysis for Transit Access to South Renton Transit Center
23
Table A-10: Option 3 – Alternative Signal Phasing - 2026 PM
Int ID Intersection Name Link Name Movement Length Volume v/c ratio
50th Queue
Length (ft)
95th
Queue
Length
(ft)
Delay LOS
Approach
Delay
Approach
LOS Int. Delay Int. LOS
EBL 72 0.56 75 128 80.7 F
EBT 1402 632 0.43 201 445 17.9 B
EBR 239
WBL 5 0.07 5 m12 96.6 F
WBT 400 412 0.27 52 m236 12.1 B
WBR 61
NBL 3
NBT 557 4 0.04 7 21 54.5 D
NBR 2 0.01 0 m0 0 A
SBL 123
SBT 517 102 0.74 230 310 71.7 E
SBR 51 0.14 0 0 0.8 A
EBL 0
EBT 557 0
EBR 356 0.82 157 168 32.3 C
WBL 12 0.15 12 34 62.8 E
WBT 698 10 0.63 46 90 96.8 F
WBR 34
NBL 0
NBT 184 1253 0.8 462 m#840 33.3 C
NBR 12 0.04 6 m9 30.8 C
SBL 51 0.54 56 m62 95.5 F
SBT 593 1425 0.73 191 m214 12 B
SBR 9 0.01 0 m0 0 A
EBL 356 0.59 175 #328 53.4 D
EBT 400 317 0.92 402 #596 111.9 F
EBR 83
WBL 100 0.77 102 #199 100 F
WBT 583 172 0.61 171 214 66.2 E
WBR 169 0.11 0 0 0.1 A
NBU 67
NBL 135 1.1 ~230 m#337 108.7 F
NBT 593 973 0.83 368 17 14.1 B
NBR 77 0.13 5 m0 0.6 A
SBU 12
SBL 364 0.87 204 #293 81.9 F
SBT 539 1197 0.97 ~714 #855 62.8 E
SBR 171 0.28 40 99 12.5 B
D
7th St 48.5 D
Rainier Ave 28.2 C
Rainier Ave 62 E
54.7119 Rainier Ave & 7th St
7th St 84.3 F
C
South Renton
Transit Center 89.5 F
Rainier Ave 33.2 C
Rainier Ave 14.6 B
25.412 Rainier Ave & Hardie Ave
Hardie Ave 32.3 C
C
7th St 12.9 B
Hardie Ave 42.4 D
Hardie Ave 58.7 E
25.911 Hardie Ave & 7th St
7th St 22.7 C
CUD 5 – Traffic Analysis for Transit Access to South Renton Transit Center
24
Table A-11: SimTraffic Queuing Results in Alternative 3
Queue
Length
Grady Way & Rainier Ave Hardie Ave & Rainier Ave 7th St & Hardie Ave 7th St & Rainier Ave
AM PM AM PM AM PM AM PM
Avg
(ft)
Max
(ft)
Avg
(ft)
Max
(ft)
Avg
(ft)
Max
(ft)
Avg
(ft)
Max
(ft)
Avg
(ft)
Max
(ft)
Avg
(ft)
Max
(ft)
Avg
(ft)
Max
(ft)
Avg
(ft)
Max
(ft)
EB
L 186 355 258 418 - - - - 27 77 85 224 50 142 181 285
T 142 317 782 1210 - - - - 20 97 456 701 48 141 256 286
R 36 220 1090 1341 86 178 298 404 24 103 540 700 48 141 256 286
WB
L 268 483 516 525 20 117 18 95 5 66 5 28 41 89 103 192
T 323 576 778 839 79 255 71 233 68 218 37 180 188 335 134 276
R 356 545 548 830 79 255 71 233 84 210 58 195 124 305 10 129
NB
L 224 235 230 235 - - - - 4 24 5 37 162 225 149 225
T 332 359 338 360 74 90 183 219 4 24 5 37 310 452 198 461
R 257 367 282 351 5 53 11 71 2 28 3 31 4 37 4 28
SB
L 38 91 239 311 64 224 68 204 55 145 319 484 73 170 279 427
T 163 196 327 549 123 344 212 448 55 145 319 484 200 344 456 539
R 8 102 122 312 3 28 28 428 18 52 57 321 40 95 164 511