HomeMy WebLinkAboutTIS 2023-12-04 item 1E - Report - Neighborhood Traffic Calming Program Year-End ReportCity of Tukwila
Allan Ekberg, Mayor
Public Works Department - Harr Ponnekanti, Director/City Engineer
INFORMATIONAL MEMORANDUM
TO: Transportation and Infrastructure Services Committee
FROM: Hari Ponnekanti, Public Works Director/City Engineer
BY: Cyndy Knighton, Senior Program Manager
CC: Mayor Ekberg
DATE: December 1, 2023
SUBJECT: Neighborhood Traffic Calming Program
Project No. 82310301
Year End Report
ISSUE
Update the Council on the achievements of the Neighborhood Traffic Calming Program for 2023.
BACKGROUND
Ever since 2021, when ARPA funding was made available to the City, and specifically the
Neighborhood Traffic Calming Program, staff, and our consultant, KPG-Psomas, has been mostly
focusing on the Top-10 Recommended NTCP Projects list developed in late 2021. The 2021
priority was to purchase normal stock items used in traffic calming, such as LED street signs,
speed feedback signs, and Rectangular Rapid Flashing Beacon (RRFB) units. In 2022, staff and
KPG focused efforts in Allentown, the TCC, three elementary schools, S Ryan Way, and the S
144th S/46th Avenue S intersection.
DISCUSSION
Building on the work completed in 2022, staff and KPG have continued building on the work
completed in 2022 and have begun additional work on the rest of the Top-10 list. Staffing changes
have reduced the amount of time available to work on the NTCP, but work has continued
addressing every project on the Top-10 list. Some study will carry into 2024 to complete the
planning and engineering; however, the construction of the new raised crosswalk and RRFB on
42nd Ave S at the S 119th Street Pedestrian Bridge is expected to be fully complete and operational
this year. When all the study efforts are complete, staff will discuss the findings with the Council
and will prioritize which projects move into construction in 2024 and beyond. Grants are not readily
available for traffic calming projects, except for the Transportation Improvement Board's Complete
Street program. A new call for projects under that program is expected in late spring, and staff
will apply for funding.
FINANCIAL IMPACT
N/A
RECOMMENDATION
Information only.
ATTACHMENTS
• Staff Top-10 Recommended NTCP Projects
• Top-10 Locations Map
73
Status Update for the Neighborhood Traffic Calming Program — December 2023
A. Allentown Neighborhood
• Completed study.
• Submitted two grant applications to fund safety, traffic calming, and pedestrian improvements.
• Completed memo for the closure of the 42nd Avenue S bridge over the Duwamish River.
• Constructed raised crosswalk with RRFB on 42nd Avenue S at 119th Street pedestrian bridge.
B. and D. Tukwila Elementary School and Cascade Elementary School
• Collected transportation count and speed data.
• Met with representatives from the two schools to understand their issues and needs.
• Developed draft set of improvements for both schools.
• In 2024, we will share draft improvements with schools and finalize improvements.
C. Impact Charter School Safety Improvements
• Collected transportation count and speed data.
• ADA and signage design for 148th Street completed in 2022.
• In 2024, we will meet with school representatives and develop improvements.
E. Tukwila Community Center Pedestrian Crossing Safety Improvements
• Project completed. RRFBs installed on 124th Street at 44th Avenue and at 46th Avenue.
F. Macadam Road S Speed and Safety Improvements
• Collected transportation count and speed data.
• Developing list of safety and traffic calming improvements.
G. Southcenter Boulevard/65th Avenue S Pedestrian Safety Improvements
• Completed preliminary design and submitted TIB grant application in 2023.
H. Citywide Residential Speed Limit Review
• Reviewed state and City of Tukwila laws related to citywide speed limits.
• Reviewed case studies for cities that have reduced local street speed limit to 20 mph.
• Documented findings in a draft memo.
• In 2024, we will evaluate select arterials for potential speed limit reductions.
I. S Ryan Way Pedestrian Safety Improvements
• Preliminary design complete.
• In 2024, City will pursue grant funding for improvements.
J. S 144th Street/46th Avenue S ADA Ramps
• Improvements constructed in 2022.
74
Staff Top-10 Recommended NTCP Projects
Modified 6/03/2022
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 recorded in the NTCP list of requests; additional traffic
complaints have been made to the City over prior years. Addressing traffic safety concerns in Allentown is a top priority for
the City.
• 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.
• New traffic counts are being done
to evaluate improvements.
$50,000-80,000
$20k for study
$640k for CN of
study
recommendations
$680,000
Study neighborhood -wide volume, speed, classification and
safety issues. Identify and design Level 1 and Level 2
treatments throughout Allentown.
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.
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 Tukwila Elementary 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.
• Improvements are expected to be
installed in 2023.
$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 the newly opened 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.
•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 seen 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.
• Improvements are expected to be
installed in 2023.
$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 element in addressing 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. Concerns over the pedestrian crossings on 5 124th Street have been raised by staff and residents in the
past, along with the larger complaints of speeding in Allentown. Increasing pedestrian visibility to improve safety in this high-
use area is a recommended top priority for the NTCP.
• Design completed for RRFBs, curb
extensions and ADA ramps at 44th
Avenue S and 46th Avenue S.
• Installation scheduled for summer
2022.
$80,000-100,000
$15k PE
$47k RRFB units
$78k RRFB
Installation
$110,000.00
Install pedestrian safety improvements on
S 124th Street at 44th Avenue S and 46th Avenue S.
Level 1: Improve pedestrian crossing signage.
Level 2: RRFB installations; upgrade ADA ramps; curb
extensions; improved illumination.
75
Staff Top-10 Recommended NTCP Projects
Modified 11/28/2023
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.
• Design to begin in 2022.
• 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 expressed 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 be
happier with 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 have been made in
2021. New developments are coming forward that will increase the residential population of this part of the City with multi-
family developments. The speed concerns, especially along S Ryan Way, coupled with the new housing developments
increasing the likelihood of increased pedestrian activity, warrants this analysis be recommended as 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.
Recommend Level 1 and Level 2 improvements. Design and
construct improvements.
Level 1: Improved signage.
Level 2: Curb extension, improved illumination.
J S 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 was also submitting 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 all state and federal laws regarding ADA requirements.
• Design at 50% with 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
$808,000
$1,016,000 -
$1,233,000
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City of
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Not to Scale
Vicinity Map
8 King County
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Disclaimer:
The location of features and boundaries
are approximate and are intended for
reference only. Data is based on best
information available.
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Date: 09/09/18 By: R. Linsao