HomeMy WebLinkAboutTIS 2022-06-21 Item 2F - Update - Neighborhood Traffic Calming ProgramCity of Tukwila
Allan Ekberg, Mayor
Public Works Department - Hari Ponnekanti, Director/City Engineer
INFORMATIONAL MEMORANDUM
TO: Transportation and Infrastructure Services Committee
FROM: Hari Ponnekanti, Public Works Director
BY: Deontae Elder, Transportation Project Manager
CC: Mayor Ekberg
DATE: June 17, 2022
SUBJECT: Neighborhood Traffic Calming Program
Project No. 80010301
ISSUE
Provide status update for the Neighborhood Traffic Calming Program (NTCP).
BACKGROUND
The NTCP was developed to guide City staff and inform residents about the procedures for
implementing traffic calming on residential streets. Speeding and unnecessary through traffic on
residential streets can create safety hazards and greatly affect neighborhood livability. Late in 2021,
the Council reinstated the full 2022 NTCP budget, which was cut due to the pandemic, for $400,000
using ARPA funding made available to the City from the Federal government.
DISCUSSION
Staff has made progress on several of the Top 10 list and plan to complete the following using 2022
funds.
• Tukwila Community Center (TCC) Pedestrian Crossing Safety Improvements: This project
has been designed and two RRFBs, adjacent to the TCC, will be installed this summer in
conjunction with the Annual Overlay & Repair Program Schedule A. Project construction was
included in the Overlay & Repair construction bid due to economy of scale.
• ADA ramps and an RRFB crossing at 144th Street/46th Avenue S: This project is near
Foster High School, has been designed, and will be installed this summer if Schedule B of the
Annual Overlay & Repair construction bid award is approved by Council. Project construction
was included in the Overlay & Repair construction bid due to economy of scale.
• Transportation Studies: KPG will develop Transportation Studies, evaluate existing conditions,
vehicle volumes and speeds, signage, and five years of historical crash data for areas
surrounding Tukwila Elementary, Impact Charter, and Cascade View Elementary schools. All
studies will include transportation counts and speed data.
• Allentown Neighborhood Speed and Safety Study: KPG developed a Transportation Study
to evaluate existing conditions, vehicle volumes and speeds, signage, and five years of historical
crash data in the Allentown neighborhood. The report studied existing conditions on several of
the key streets in the neighborhood and made some recommendations for improvements that
could be made to improve quality of life for residents, reduce speeds and improve safety for all
users.
KPG staff attended the March 22, 2022 and April 26, 2022 Allentown Community meetings to
gather feedback from residents. Feedback received can be found in the attached Neighborhood
Speed & Safety Study - Community Feedback attachment.
57
INFORMATIONAL MEMO
Page 2
Based on community feedback, a Rectangular Rapid Flashing Beacon (RRFB) and a raised
crosswalk on 42nd Ave S at the S 119th street pedestrian bridge crossing has been added to the
planned improvements list for the Allentown neighborhood. The preliminary cost estimate for the
RRFB and raised crosswalk improvements are anticipated to be approximately $240,000. The
detailed cost estimate is attached.
FINANCIAL IMPACT
Projects on the Staff Top -10 list are anticipated to cost over $1.2 million. Staff will complete a portion
of the Top -10 list using the 2022 budget. Remaining items on the list will be completed using future
NTCP funding. The City is also applying for grant funding for 2023 NTCP improvements, including a
Washington State Department of Transportation's Pedestrian -Bicycle Program grant funding for
traffic calming improvements in Allentown.
RECOMMENDATION
Discussion only.
ATTACHMENTS: 2021 CIP, Page 2
Staff Top -10 Recommended NTCP Projects (Updated 6-6-22)
Staff Top 10 Recommended NTCP Projects Map
Allentown Neighborhood Speed & Safety Study - Community Feedback
S 119th Street Crossing Cost Estimate
58
CITY OF TUKWILA CAPITAL PROJECT SUMMARY
2021 to 2026
PROJECT: Traffic Calming/Residential Safety Improvements Project No. 80010301
Programmatic approach to addressing neighborhood traffic concerns through a variety of methods.
DESCRIPTION: Residential street improvements with sidewalks, safety improvements, and bike facilities.
JUSTIFICATION: Neighborhood revitalization by improving residential streets.
STATUS: Future candidates are listed in the citywide comprehensive update and safety -based prioritization of
residential street improvements, sidewalks, and bike lanes.
MAINT. IMPACT: Varies, depends on treatment(s) used.
COMMENT: Residential improvements and traffic calming features to reduce speeds and improve pedestrian and bicycl
such as the speed cushions, RRFB crossings, LED enhanced signs, Radar driver feedback signs, etc.
FINANCIAL
(in $000's)
Through Estimated
2019 2020 2021
2022
2023
2024
2025
2026
BEYOND
EXPENSES
Design
63
50
100
100
Land (R/W)
Const. Mgmt.
37
Construction
148
0
300
TOTAL EXPENSES
248
50
100
400
0
0
0
0
0
FUND SOURCES
ARPA Funding
100
400
Awarded Grant
Proposed Grant
Mitigation Actual
Mitigation Expected
City Oper. Revenue
248
50
0
0
0
0
0
0
0
TOTAL SOURCES
248
50
0
0
0
0
0
0
0
2021 - 2026 Capital Improvement Program
2
59
Staff Top -10 Recommended NTCP Projects
Modified 6/9/2022
Original Cost Updated Cost Updated Cost
Project Details Potential Treatment Options Status
Estimate Range Estimate Range
A Allentown Neighborhood
Speed and Safety Study
Since 2018, five individual requests for traffic calming have been
complaints have been made to the City over prior years. Addressing
the City.
recorded in the NTCP list of requests; additional traffic
traffic safety concerns in Allentown is a top priority for
Level 1: Improved signage; radar feedback signs; pavement
marking modifications.
Level 2: Sidewalks; curb extensions; raised crosswalk; traffic
calming; and remove the eastbound right -turn slip lane and
reconfigure the S 124th Street/50th Place S intersection.
• Draft Transportation Safety Study
completed.
• Conducted public outreach
meetings on 3/22/22 and 4/26/22.
• Submitted WSDOT Pedestrian and
Bicycle Program Grant application in
5/2022.
• Collecting new counts and speed
data to evaluate improvements.
$50,000-80,000
$20k for study
$640k for CN of
study
recommendations
119th Ped. Bridge
Location: $56,000
for design and
$185,000 for
construction.
$921,000
Study neighborhood -wide volume, speed, classification and
safety issues. Identify and design Level 1 and Level 2
treatments throughout Allentown.
B Tukwila Elementary School
Safety Improvements
Since 2018, 12 traffic calming requests have been made in the Tukwila Hill neighborhood, with a significant number near
Tukwila Elementary School. Common complaints have been about speeding and crosswalk or pedestrian safety. Additionally,
the Council has asked for proactively addressing or anticipating concerns, specifically around school zones. Some
improvements have been made around the school already, but more improvements are needed.
• Transportation Safety Study
initiated 5/2022.
• Collecting transportation counts
and speed data before the end of
the school year to inform the
evaluation of improvements.
$30,000-80,000
TBD
$30,000-80,000
Address pedestrian mobility, crosswalk safety concerns,
speeding, sight distance, and upgrade School Zone signage.
Level 1: School Zone beacons; improved signage; radar
feedback signs; pavement marking modifications.
Level 2: Curb extensions; RRFB installation; ADA ramp
upgrades; improved illumination.
C Impact Charter School Safety
Improvements
A request specific to Impact Charter School was received in 2019. The request was to provide a signed school zone, which
Tukwila has provided signs marking school crossings on S 148th Street. ADA -compliant ramps have not been installed at the
marked school crossings. The charter school has expanded their site to the north which requires creating a school zone on S
146th Street and other potential improvements for children's safety. Additionally, the Council has asked for proactively
addressing or anticipating concerns, specifically around school zones.
• Transportation Safety Study
initiated 5/2022.
• Collecting transportation counts
and speed data before the end of
the school year to inform the
evaluation of improvements.
• Proposed private development
may provide ADA ramp
improvement on S 146th Street.
$8,000-15,000
TBD
$8,000-15,000
Provide school crossing improvements, establish school zone
on S 146th Street, if needed. Provide school crossing
improvements, observe operating speeds, if necessary
establish speed zone.
Level 1: Improved signage for school zones on S 148th Street
and S 146th Street; crosswalk installations.
Level 2: ADA ramp improvements; RRFB installations; curb
extensions.
D Cascade View Elementary
School Safety Improvements
Since 2018, the Cascade View neighborhood has s een 9 requests for traffic calming. Four of the requests were about
speeding, school crossing and pedestrian safety at locations around the Cascade View Elementary School. 85th Percentile
speeds of "30MPH have been recorded, but analysis is needed to identify if speeding occurs during the 20MPH-active school
zone period. Additionally, the Council has asked for proactively addressing or anticipating concerns, specifically around
school zones.
• Transportation Safety Study
initiated 5/2022.
• Collecting transportation counts
and speed data before the end of
the school year to inform the
evaluation of improvements.
$8,000-15,000
TBD
$8,000-15,000
Upgrade School Zone signing, design and install pedestrian
crossing improvements.
Level 1: Improved signage for school zones on S 148th Street
and S 146th Street; crosswalk installation.
Level 2: ADA ramp improvements; curb extensions;
enhanced crosswalk treatments.
E Tukwila Community Center
Pedestrian Crossing Safety
Improvements
The City Council has expressed desire for the NTCP to have a proactive approach to address traffic calming and safety needs
throughout the City. The TCC is a well -utilized facility by the Allentown neighborhood as well as the entire City and
surrounding area. There have been concerns related to pedestrian crossings on S 124th Street and speeding in Allentown.
Increasing pedestrian visibility to improve safety in this high -use area is a recommended top priority.
Install pedestrian safety improvements on Level 1: Improve pedestrian crossing signage.
S 124th Street at 44th Avenue S and 46th Avenue S. Level 2: RRFB installations; upgrade ADA ramps; curb
extensions; improved illumination.
• Design completed for RRFBs, curb
extensions and ADA ramps at 44th
Avenue S and 46th Avenue S.
• Installation scheduled for summer
2022. This is included with the 2022
overlay program this summer.
$80,000-100,000
$15k PE
$47k RRFB units
$78k RRFB
Installation
$110,000.00
60
Staff Top -10 Recommended NTCP Projects
Modified 6/9/2022
Original Cost Updated Cost Updated Cost
Project Details Potential Treatment Options Status
Estimate Range Estimate Range
F Macadam Road Speed and
Safety Improvements
At least five requests for traffic calming, specific to speeding (and some secondary reasons) have been made since 2018. A
radar feedback sign was placed near the 13700 block in 2019 but requests have continued to be made. Additional analysis is
warranted to determine what other improvements could be used to address the speeding, especially where Macadam Road
has extremely limited sight distance due to the curvy nature of the roadway.
• Design to begin in 2/3Q.
$10,000 - 30,000
TBD
$10,000 - 30,000
Design and install treatments addressing speeding and curve
safety north of S 144th Street.
Level 1: Improved signage; LED chevron signs; channelization
modifications.
Level 2:
G Southcenter Boulevard/65th
Avenue S Pedestrian Safety
Improvements
Staff identified the need for improvement pedestrian safety at this location several years ago. Southcenter Boulevard is a 5-
lane roadway with known speeding issues along with curves that restrict sight distance. A high pedestrian usage at this
intersection accessing the King County Metro bus stop that services both the Rapid Ride F -Line and Route 150, both
workhorses of the south County transit network, justifies improving pedestrian crossing safety. This intersection is slated for
full signalization in the future, but interim pedestrian safety improvements should be considered sooner.
• Funding available for design of full
signal in 2022 CIP.
• Will consider signage
improvements for interim in 2/3Q.
$50,000-$90,000
TBD
$50,000-$90,000
Design and install pedestrian safety improvements
Level 1: Improved signage for pedestrian crossing.
Level 2: RRFB installation; ADA ramp upgrades; improved
illumination.
H City-wide Residential Speed
Limit Review
As part of the City Council's desire to proactively look at traffic calming needs, a full review of the residential street posted
speed limits is recommended by staff. State law establishes city speed limits at 25MPH unless an engineering study is
completed to justify higher speed limits. Most residential streets are posted at 25MPH today, but there are many that are
posted at 30MPH or 35MPH. Likely, those speed limits are legacies of past annexation areas, where a speed study was
completed by King County. The general impression Staff has is that most residents and elected officials would prefer lower
speed limits. City of Seattle has also recently lowered all speed limits nearly city-wide to be 25MPH.
• Not started yet.
$5,000-8,000
TBD
$5,000-8,000
Identify residential streets with speed limits currently above
25MPH. Conduct volume, speed and safety review.
Recommend changes to speed limits, as necessary.
Level 1: Modify speed limit ordinance; as needed; install new
signs; as needed.
Level 2:
I S Ryan Way Pedestrian
Safety Improvements
Two requests for traffic calming to address speeding and pedestrian crossing safety in the Ryan Hill area were made in 2021.
New developments are coming forward that will increase the residential population in this part of the City with multi family
developments. The speed concerns, especially along S Ryan Way, coupled with the new housing developments are expected
to increase pedestrian activity and warrant this analysis to be a top priority.
• Transportation Safety Study for
improved signage and safety
improvements may begin in 2/3Q.
• Construction of improvements
possible in 2023.
$10,000-100,000
TBD
$10,000-100,000
Safety study on S Ryan Way from MLK Jr. Way to east city
limits, focusing on speeding and pedestrian safety.
Level 1: Improved signage.
Level 2: Curb extension, improved illumination.
J 5 144th Street/46th Avenue
S ADA Ramps
The Tukwila School District requested school crossing safety improvements at this intersection in 2017. A new Rectangular
Rapid Flashing Beacon was installed in 2019. At the time the RRFB was installed, the City also submitted a grant application
for the 46th Avenue S Safe Routes to School project, which would improve pedestrian safety between this intersection south
to S 150th Street, and would include either a raised pedestrian crosswalk at the RRFB or install ADA -compliant curb ramps.
The grant was not awarded. State law requires ADA ramps be brought up to current standards anytime a new signal,
including the RRFB, is installed. Since grant monies for the larger improvement are not expected in the short term, staff
recommends this as a priority to comply with laws regarding ADA requirements.
• Design complete and construction
to be done with the 2022 Annual
Overlay Project.
$15,000-20,000
$15k PE
$90k Construction
$105,000
Design and install ADA -compliant ramps at the intersection.
Level 1:
Level 2: ADA upgrades to ramps at RRFB (not done at time of
RRFB installation due to budget constraints).
Total $266,000-$538,000
$1,065,000
$1,257,000 -
$1,474,000
61
•
i
Lake Washington
S 152nd St
RENTON
Line
i
S 200th St
U:\PW Eng \GIS General Maps \Streets_11x17_Sept2018.mxd
Date: 09/09/18 By: R. Linsao
City of
Tukwila
S
Not to Scale
Vicinity Map
King County
Disclaimer:
The location of features and boundaries
are approximate and are intended for
reference only. Data is based on best
information available.
Allentown Neighborhood Speed and Safety Study - Community Feedback
• Would like truck signage on S 124th St. for exiting the neighborhood.
• Consultants and City staff need to be in the neighborhood to observe patterns, see things happen, etc.
• Speed cushions on 42nd Ave S are desired.
• 3-way stop at East Marginal Way S and S 115th St. is desired by numerous people.
• The crossing at 42nd Ave S and S 119th St., by the pedestrian bridge, has had some near misses with kids.
This is used often by individuals including kids. RRFB and speed cushion near this location are
recommended.
• A small curve sidewalk in front of Allentown Superette convenience store business at the S 124th St. & 42nd
Ave S 3-way stop section.
• Looking up Allentown Puget Sound Clean air energy due to the heavy number of trucks passing through the
area.
• Sight line concerns at the SE corner of S 124th St and 46th Ave S.
• Various persons did not like the closing of S 125th St @ 50th PI S.
• Due to the reroute, the truck traffic has been pushed to 50th PI S. moving the speeding and noise issues
from S 124th St. to 50th PI.
• S 125th St. is not really a big cut through.
• Resident not interested in cushions on S 125th St.
• Another resident inquired about making S 125th St. a chicane roadway.
• Recommendation from resident to collect speed and data at open space locations.
• Place speed cushions at public open space areas.
• Generally, everyone excited about RRFBs at 44th Ave S and 46th Ave S and the improved crossing at S.
119th St. and 42nd Ave S.
• The park at 50th PI. and the bridge is very well used in the summer, creating high pedestrian demand.
• Install 3-way stop at S 115th St. and East Marginal Way S., or add a signal
• Residents seems to be okay with left turn being restricted out of S. 125th St., but wanted to maintain left
turns into S. 125th St.
• All attendees supported removing the slip lane at S 124th St. and 50th PI.
• Improve the park access/shoulders/parking at the Duwamish hill park.
• Put a bollard on west side of S 119th St. pedestrian bridge, instead of switchbacks.
• Trucks on 50th PI. create delays and access issues for residents that live on 50th PI.
• Trucks on 50th PI. vibrate the houses on 50th PI.
• General feeling was the southbound direction bridge reopening was not the best.
• Many residents concerned about emergency vehicles getting into Allentown should an emergency require
more than one engine.
• The fire station in Allentown is northern most station in city. They've been using East Marginal Way S. and
Interurban to get south for a couple years and have not noticed a significant reduction in response time.
• Concern over the southbound direction was response time if a response required multiple engines and
ladder truck they'd have to go to S 115th St. then back down 42nd Ave S to get there, making the route
longer, and making the response time longer. With the age of the houses mixed in with the new construction
and proximity to one another, a single house fire may likely spread quickly if the additional engines could not
respond and get to the location fast enough.
• Northbound bridge access is best for southern station response time.
63
55241.55
Pedestrian and Bicycle Program Project Cost Estimate
S 119th Street Raised Pedestrian Crossing with RRFB
COST ESTIMATE SCOPING ITEMS
Total
Units
Quantity
Unit Price x
Unit Price Quantity
Total
CONSTRUCTION COST ESTIMATE
CONSTRUCTION SURVEYING 1 LS 5000 5000
MOBILIZATION 1 LS 25000 25000
MAINTENANCE AND PROTECTION OF TRAFFIC CONTROL INCLUDING FLAGGING 1 LS 10000 10000
CLEARING & GRUBBING 900 SF 5 4500
REMOVAL OF STRUCTURES AND OBSTRUCTIONS 1 LS 1500 1500
SAWCUT ASPHALT AND/OR CONCRETE, FULL DEPTH 120 LF 25 3000
COMMON EXCAVATION 100 CY 55 5500
PAVEMENT, HMA 25 TN 350 8750
PAVEMENT, CEMENT CONCRETE 25 CY 400 10000
PAVEMENT PATCH, TEMPORARY TN 0
SPEED CUSHION OR OTHER GEOMETRIC TREATMENT (REPEAT AS NEEDED) EA 0
CATCH BASIN 2 EA 1500 3000
PIPE, CB CONN, D.I., CL 50, 8 IN 10 LF 85 850
BEDDING, CL B, 8IN PIPE 10 LF 125 1250
PIPE, PSD, D.I., CL 50, 12 IN LF 0
CONSTRUCTION STORMWATER & EROSION CONTROL 1 LS 5000 5000
TREE, VEGETATION & SOIL PROTECTION 1 LS 5000 5000
CURB RAMPS, CEM CONC 2 LF 4500 9000
CURB AND GUTTER, CEM CONC 60 LF 45 2700
SIDEWALK, CEM CONC 125 SY 75 9375
DRIVEWAY, CEM CONC 10 SY 150 1500
SIGN, TRAFFIC 6 SF 500 3000
POST, TRAFFIC SIGN 6 EA 1000 6000
LUMMINAIRE/STREET LIGHT 1 EA 10000 10000
PAVEMENT MARKINGS, THERMOPLASTIC, 8 IN STRIPE 60 LF 12 720
PAVEMENT MARKINGS, THERMOPLASTIC, LEGEND/SYMBOL 2 EA 500 1000
BICYCLE PUSHBUTTON ASSEMBLY, ALL INCLUDED EA 0
RAPID FLASHING BEACON SYSTEM OR OTHER TRAFFIC CONTROL (REPEAT AS NEEDED) 1 LS 10000 10000
SUBTOTAL 141645
Cost Estimate Subtotal
Cost Estimate Contingency
Cost Estimate Grand Total (Construction)
PE Design & Environmental (Between 10% and 30%)
ROW
PE and ROW Subtotal
30%
30%
Project Cost Estimate Total
Acronyms
LS = LUMP SUM
SF = SQUARE FOOTAGE
CY = CONSTRUCTION YARD
TN = TON
EA = EACH
SY = SQUARE YARD
141645
42493.5
184138.5
184138.5
239380.1
64