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Home My WebLink AboutTIC 2020-03-02 Item 2D - Report - 2019 Year-End Report on Neighborhood Traffic Calming ProgramTO: FROM BY: CC: DATE City of Tukwila Allan Ekberg, Mayor Public Works Department - Henry Hash, Director INFORMATIONAL MEMORANDUM Transportation and Infrastructure Committee Henry Hash, Public Works Director Cyndy Knighton, Senior Program Manager Scott Bates, Traffic Engineering Project Manager Mayor Ekberg February 28, 2020 SUBJECT: Neighborhood Traffic Calming Program Project No. 81910301 2019 Year-end Report ISSUE Provide a year-end summary of 2019 accomplishments for the Neighborhood Traffic Calming Program (NTCP). BACKGROUND The NTCP was adopted by Council Resolution (No.1955) at the end of 2018 to address neighborhood concerns with traffic safety. The Council wanted to ensure that traffic calming safety decisions are based on technical engineering and applied in a uniform and consistent manner. The 2019-2020 budget provides annual funding to implement traffic calming strategies on residential streets and other safety improvements throughout Tukwila. DISCUSSION Staff continues to collect requests for traffic calming treatments and other improvements in residential areas. Requests for calming treatments and other safety improvements come into staff via a variety of ways: • Enrollment requests from the City's website • See-Click-Fix/Tukwila Works • Email inquiries • Phone calls • Face-to-face conversations • Other Departments, especially Police • Historical knowledge • Elected officials When the Council adopted the NTCP, staff had a list of approximately 22 requests. Currently, 60 individual requests for improvements have been made. Requests come in sporadically and it is not uncommon for new requests to come in weekly. With only 18 issues waiting for action, staff is more able to focus proactively on residential safety improvements. Highlights of the list of 2019 NTCP accomplishments are: • Four new RRFB crosswalks • Two newly marked crosswalks with signs • 12 new radar signs • One new school zone beacon with school crossing • 13 new LED stop signs • One 3-way stop to all -way stop conversion • 4 additional speed cushions on 53rdAve S • Adding/upgrading 25 streetlights • 54 parking restriction/prohibition signs. W:1PW Eng1PROJECTSIA- RW & RS ProjectsUra(fic Calming\TukW Ia Traffic Calming Program\INFORMATION MEMO- NTCP 2019 Progress 1-21-2020.docx 37 Traffic Calming Info Memo Page 2 An on -call contract was established with KPG to assist staff with the engineering for crosswalk siting studies, development of RRFB plans, and other needs that may come up to support the NTCP program. Crosswalks require engineering study to ensure that they are safely sited, and the City is legally protected. On -call design work, counts and traffic analyses were completed at nine locations for stop compliance, accident prevention, speeding, pedestrian/school safety and traffic flow. One recently completed design study is the 53rd Ave S circulation revision. This study is the result of multiple requests to provide safer pedestrian access from the North Hill neighborhood to the Interurban Metro Park and Ride at 52nd Ave S. As documented in the attached study, 53rd Ave S is not wide enough for bi-directional traffic and pedestrians to coexist safely. The proposed improvement would revise 53rd Ave S to a one-way northbound shared motorist/bicycle lane while providing a designated buffered pedestrian walkway from S.137t" St. to the existing sidewalk on 53rd Ave S. Staff proposes to include these improvements with the 2020 Overlay construction using the NTCP funding source for the one-way couplet conversion. Including this work in the 2020 Overlay Project is expected to be more cost effective than a stand-alone contract. In 2019, NTCP expenses totaled $206,779.84 of the $400,000 budget. City staff time and resources were utilized when possible to save on the installation costs and the expedite work. The NTCP has been a great program that brings staff closer to the community which helps staff understand their needs and issues. The attached map shows the locations where traffic calming treatments have been implemented to date. RECOMMENDATION Information only. ATTACHMENTS • Page 8, 2019 CIP • Map of 2019 NTCP improvements • 2019 NTCP list of Accomplishments • 53rd traffic circulation study and revision plan 38 CITY OF TUKWILA CAPITAL PROJECT SUMMARY 2019 to 2024 PROJECT: Traffic Calming/Residential Safety Improvements Project No. 90210301 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. Future candidates are listed in the citywide comprehensive update and safety -based prioritization of STATUS: residential street improvements, sidewalks, and bike lanes. MAINT. IMPACT: Varies, depends on treatment(s) used. COMMENT: Residential improvements have included 42nd Ave S, 53rd Ave S. Speed cushions installed at S 160th St. FINANCIAL Through Estimated (in $000's) 2017 2018 2019 2020 2021 2022 2023 2024 BEYOND TOTAL EXPENSES Design 9 80 80 80 80 80 80 80 569 Land(R/W) 0 Const. Mgmt. 0 Construction 38 320 320 320 320 320 320 320 2,278 TOTAL EXPENSES 1 47 1 0 400 1 400 1 400 1 400 1 400 1 400 1 400 1 2,847 FUND SOURCES Awarded Grant 0 Proposed Grant 0 Mitigation Actual 0 Mitigation Expected 0 City Oper. Revenue 47 0 400 400 400 400 400 400 400 2,847 TOTAL SOURCES 47 0 400 400 400 400 400 400 400 2,847 2019 - 2024 Capital Improvement Program 8 39 NTCP 2019 Installations 4p GIS Tukwila 2019 NTCP Accomplishments January 1, 2019 - December 31, 2019 RequesterLocation Safety issue(s) Rapid Rectangular Flashing Beacons TIB at S.141st St Pedestrian crossing safety School Crossing safety Abu-Bakr TSD $263,000 Installed two RRFB crossings, radar sign southbound 2 ✓ 5/19/2019 S.144th St at 46th Ave S $18,000 RRFB is installed, 2 radar signs installed 2 ✓ 5/1/2018 S.144th St at 37th Ave S Crossing safety/marked xing Tuk-Works $20,000 RRFB designed/installed Completed 2 ✓ 9/1/2019 65th Ave S at Southcenter Blvd Pedestrian crossing safety Staff/Historical TBD Design drafted 2 ✓ 62nd Ave S at Southcenter Blvd Pedestrian crossing safety Tuk-Works TBD Design drafted 2 2 ✓ ✓ 9/1/2019 S.150th St at Thorndyke Elementary School Crossing/marked xing Staff/Historical n/a Completed 2019 by TSD LED Enhanced Stop Signs 58th Ave S at S.144th St Failure to obey stop sign Tuk-Works $2,000 1 sign installed for EB 144th at 58th/design for 4-way 1 ✓ 5/19/2019 37th Ave S at S.137th St Failure to obey stop sign Tuk-Works $6,000 3 signs installed 1 ✓ 71112019 37th Ave S at S.140th St Failure to obey stop sign Tuk-Works $8,000 4 signs installed 1 ✓ 71112019 53rd Ave S at S.170th St Speeding, stop sign request Tuk-Works $2,000 Signs ordered for eastbound 1 ✓ 1/1/2020 S.133rd St at 32nd Ave S 4 way stop safety Tuk-Works $4,000 2 signed installed for east and west 1 ✓ 9/1/2019 S.135th St at 32nd Ave S 4 way stop safety Tuk-Works $4,000 2 signed installed for east and west 1 ✓ 9/1/2019 S.147th at 57th Ave S 4 way stop safety Legacy $2,000 reviewed/converted 3-way to all -way stop 1 ✓ 10/1/2019 Military Rd at S.133rd Failure to obey stop sign Seatac $2,000 1 sign installed for WB 1 ✓ 9/1/2019 S.170th at 53rd Failure to obey stop sign Tuk-Works $2,000 1 sign installed for WB 1 ✓ 2/1/2020 S.144th at 56th Ave S Failure to obey stop sign Staff/Historical $4,000 2 signed installed for east and west 1 ✓ 2/1/2020 Driver Speed Feedback Signs S.148th St at 4400 blk * Speeding Tuk-Works $6,000 2 Radar signs installed 1 ✓ 71112019 Macadam Rd S at 13700 blk Speeding/school bus stop safety Tuk-Works $6,000 2 Radar signs installed 1 ✓ 8/1/2019 S.164th St at 4700 blk Speeding Tuk-Works $6,000 2 Radar signs installed 1 ✓ 71112019 42nd Ave S at 11900 blk Speeding Tuk-Works $6,000 2 Radar signs installed 1 ✓ 4/1/2019 S.140th St at 3500 blk Speeding Tuk-Works $6,000 2 Radar signs installed 1 ✓ 8/1/2019 S.130th St at 37th Ave S Speeding Tuk-Works $6,000 12 Radar signs installed. 1 ✓ 3/1/2019 Speed Cushions 53rd Ave S at S 140th Speeding Tuk-Works $12,000 4 speed cushions installed 2 ✓ 9/1/2019 S.148th St at 4400 blk * Speeding Tuk-Works TBD 1 speed cushion installed, 1 more being considered 2 ✓(partial) School Zones S.148th St (Impact Charter Schools) School Zone safety Impact school $23,591 Completed- new flashers, marked crossing, curbing 2 ✓ 9/1/2019 S.144th St at 44th PI S Miscellaneous 62nd at City Hall School Crossing safety/xing Pedestrian crossing safety Tuk-Works Tuk-Works TBD $0 Design reviewed/not recommended Marked and signed crossing completed TBD 1 x ✓ 10/1/2019 53rd/52nd Traffic circulation revision Pedestrian/Bicycle safety Staff/Historical $15,000 Design completed/construction in 2020 2 ✓ 12/1/2019 65th, Scblvd and 62nd Safety lighting Tuk-Works $26,127 Installed new and replaced old lighting with LED 1 ✓ 10/1/2019 42nd Av S at S.140th Sight distance/Safety Tuk-Works $0 Installed parking prohibitions near SE corner 1 ✓ 10/1/2019 44th Ave S at 11800 blk Speeding Tuk-Works $0 Speeding not confirmed. No action taken 1 x 1 7/1/2019 41 Memorandum To: Scott Bates, City of Tukwila Public Works From: John Davies, AICP, PTP and Jan Ciganik, PE, PTOE — KPG P.S. Date: 12/6/2019 Re: Review of Traffic Circulation: 52nd Avenue S, 53rd Avenue S, S 137th Street This memorandum evaluates the potential change of 53rd Avenue S to one-way operations between 52nd Avenue S and S 137th Street. This planned improvement is designed to improve safety and circulation within the Foster Neighborhood of the Tukwila, located to the west of Interurban Avenue S and east of 1-5. The analysis uses vehicle volume and speed data collected at seven locations along 52nd Avenue S, 53rd Avenue S, 53rd Place S and S 137th Street. Existing Conditions The neighborhood is made up of a set of narrow streets (18'-30' wide) which form several T-intersections, with stop controls on the minor approaches. The area has a challenging topography, with grades exceeding 15 percent on segments of 52nd Place S, 53rd Avenue S and S 137th Street (east of 52nd Place S). Due to its narrow width, 52nd Place S is a northbound one-way street. There are sidewalks along the north side of 52nd Avenue S and on the east side of 53rd Avenue S near 52nd Avenue S. S 137th Street has a small segment of painted shoulder walkway along the south side of the street between the west and east segments of 53rd Avenue S. To the south of S 137th Street, 53rd Avenue S has sidewalks on both sides and sharrow markings for bicycles. All other streets in the study area lack sidewalks and bicycle facilities. Figure 1 shows the current configuration of the neighborhood street network, with 5 137th St r 53rd Ave S/ S 137th St (West) D m U) 53rd Ave S/ \a S 137th St (East) �L �'P -� s �3Ttr st Legend —Sidewalk/Walkway M Crosswalk F Sharrow OneWayTraffic • Stop Sign Not to SGaie. N the red arrow indicating the one-way Figure 1. Existing conditions in the Foster neighborhood of Tukwila. northbound operations on 52nd Place S. 3131 Elliott Avenue, Suite 400, Seattle, WA 98121 206.286.1640 www.kpg.com 42 Speed data was collected for seven consecutive days in November 2019 at seven locations in the neighborhood. At most locations, the measured 85th percentile speeds were generally below the posted 25 mph speed limit. One exception was on 53rd Avenue S to the south of S 137th Street where the northbound 85th percentile speed was 29 mph and nearly 40 percent of vehicles traveled above the 25 mph speed limit. Key Issues Primary concerns in the neighborhood include cut -through traffic, safety and the lack of facilities for people walking and biking. The following priority issues were identified for this study: • Providing a shoulder pathway along the east side of 53rd Avenue S between 52nd Avenue S and S 137th Street for people walking and biking. • Addressing the sight distance issue for northbound turning vehicles at the 52nd Place S/52nd Avenue S intersection. • Maintaining circulation while minimizing cut -through traffic volumes. • Limiting impacts on primarily residential streets such as 52nd Place S. • Improving non -motorized circulation through the area. Proposed Improvements The proposed traffic revision would convert 53rd Avenue S (between 52nd Avenue S and S 137th Street) from a two-way to a one-way street northbound and convert 52nd Place S from a one-way street northbound to a one-way street southbound. To minimize out -of -direction travel, two-way operations will be maintained on all other streets. The proposed improvements would include the following elements: Directional Changes 1. Conversion to northbound one-way operation on 53rd Avenue S, north of S 137th Street. A short section of two-way operation would be retained on 53rd Avenue S for 130' south of the 52nd Avenue S intersection to allow for access to the office building on the east side of the intersection. 2. Conversion of 52nd Place S from a northbound one-way street to a southbound one-way street in order to eliminate the existing sight distance issue. A mid -block speed hump is recommended reduce vehicle speeds. "Local Access Only" signage will be installed to reduce cut -through traffic. 3. Installation of wayfinding signage to direct southbound traffic on 52nd Avenue S to S 137th Street. Page 1 2 43 Traffic Controls Modifications to traffic controls are necessary to reflect changes in traffic volumes through the transportation network. MUTCD guidance (Section 2B) was used to determine the location of stop control at intersections. At the 53rd Avenue S/S 137th Street intersection (west), the proposed improvements remove the eastbound stop sign and retain the northbound stop sign. This reflects the anticipated higher volumes on S 137th Street resulting from the one-way conversion. Removal of stop controls at the 53rd Avenue S/S 137th Street intersection (east location) would occur with the conversion of the street to northbound one-way traffic. The conversion of 52nd Place S to southbound one-way traffic would remove the existing northbound stop sign at 52nd Avenue S and add a new stop sign for the southbound approach at S 137th Street intersection. Non -Motorized Facilities The one-way operation on 53rd Avenue S allows space for a new walkway along the east side of the street connecting to the existing sidewalk at the north end of the segment. This walkway is envisioned as paint -delineated and would include "Do Not Park on Walkway" signs, consistent with similar facilities in the area. The following improvements are recommended to create a connected non -motorized transportation network: — � g Existing Proposed Addition of a striped buffer marking to the existing south side walkway on S 137th Street between the west and east segments of 53rd Avenue S. A new crosswalk on the east leg of the 53rd Avenue S/S 137th Street intersection (east) to connect the new walkway on 53rd Avenue S with the existing walkway on the south side of S 137th Street. • Addition of shared lane markings or "sharrows" on 52nd Avenue S, 53rd Avenue S and S 137th Street to establish a bicycle network through the area. The combination of sharrow markings and MUTCD-compliant bicycle wayfinding signs are recommended. • Creation of a striped walkway area along the east side of 52nd Place S. M Office ' 4 / U) S tiS7th St Ln w S 137th St (West) D m j CA i Figure 2. Proposed traffic revision 53rd Ave S/ tS 1t) a G N LIB S �g7tr gt Legend —Sidewalk/Walkway Crosswalk +Sharrow One -Way Traffic • Stop Sign Not to Scale. N non -motorized facilities. Figure 2 shows red arrows indicating the direction of one-way traffic with the revision and the location of stop signs. Also indicated are the existing (dashed) and proposed (solid) sharrow routes in green, and the existing and recommended pedestrian facilities marked in blue. As part of the revision, MUTCD-compliant signage and roadway markings will be installed to communicate the revised traffic pattern to drivers. These may include installation of "One -Way", "Do Not Enter", Page 13 44 "Local Access Only", and directional wayfinding signs ("To 53rd Avenue S") to establish the proposed travel route. The attached figure shows the details of the proposed design. Evaluation of Improvements The proposed changes to the circulation pattern will impact how traffic flows through the neighborhood. The following section describes the changes to vehicle volumes, intersection operations and travel times between the existing and proposed configurations. Vehicle Volumes With the proposed improvements, approximately 700 daily trips (87 peak hour trips) currently using 53rd Avenue S would be redirected to other routes to access S 137th Street. While some increase in traffic would be expected on 52nd Place S, wayfinding signage would direct traffic to turn at S 137th Street in order to reduce the impact to homes on 52nd Place S. Intersection Operations The traffic revision will detour vehicles from current routes and may bring higher numbers of vehicles to streets that presently have very low volumes. KPG used Synchro 10 software to calculate intersection operations for the PM peak hour, using vehicle volumes collected in November 2019. Level of service (LOS) is a measurement of the quality of traffic flow or traffic congestion at an intersection. Intersection LOS is defined by the seconds of delay experienced by vehicles traveling through the intersection. Intersection LOS ranges from A to F, with LOS A assigned when minimal delays are present and LOS F when lengthy delays occur. Table 1 summarizes the LOS and seconds of delay at each intersection without and with the proposed circulation revision. Table 1. PM Peak Hour Intersection Operations Without and With Project Intersections Without Project With Proposed Improvements 53rd Ave S/52nd Ave S A (8) A (9) 52nd Place S/52nd Ave S A (8) -- 52nd Ave S/S 137th St A (9) A (10) 52nd Place S/S 137th St -- A (9) S 137th St/53rd Ave S (west) A (9) A (9) S 137th St/53rd Ave S (east) A (9) -- Highway Capacity Manual 6th Edition LOS and delay. The delay of the worst -performing approach at a stop -controlled intersection is reported. Results of the operational analysis shows only minor increases in delays at two intersections with the proposed improvements. 0 45 Travel Times Point-to-point travel times were estimated based on the travel distances and delays at intersections, as a result of the proposed changes to the circulation pattern through the area. Figure 3 shows the travel time start and end points, labeled A-D. Table 2 shows the change in travel times in seconds between existing conditions and with proposed improvements during the PM peak hour. The table also shows percent changes in travel time. The proposed improvements result in longer travel times from point A to points C and D due to increased out of direction travel. The removal of the eastbound stop sign at 53rd Avenue S/S 137th Street (west) intersection, would result in shorter travel times from point B to points C and D, but longer travel times from point D to points B and C. Figure 3. Travel time origins/destinations. Table 2. Change in PM Peak Hour Travel Time with Improvements (Seconds) PM From A B C D A x 0.0 (0%) 0.1 (0%) 0.0 (0%) B 0.0 (0%) x 1.3 (4%) 8.5 (25%) C 4.7 (13%) -9.1 (-32%) x 7.4 (34%) p 1 12.7 (36%) 1 -9.1 (-26%) 0.1 (0%) x Conclusion The proposed conversion of 53rd Avenue S to one-way operations to the north of S 137th Street addresses the safety and circulation issues within the neighborhood. The conversion provides an opportunity to create a complete pedestrian network by constructing a shoulder pathway along the east side of 53rd Avenue S between 52nd Avenue S and S 137th Street. The project will also address the sight distance concern at the 52nd Place S/52nd Avenue S intersection by changing the one-way traffic flow from northbound to southbound. Further improvements include the addition of traffic calming and the creation of a walkway area on 52nd Place S. The proposed routes will have only minor impact to traffic operations, but will increase out of direction travel for some destinations which may be considered to be a negative impact by some residents. Cost estimates for the re-striping/sign purchase and installation are not calculated and are not included in this report. 46 SIGN SCHEDULE: Si R4-11 BIKE MAY USE FULL LANE S2 R6-2 ONE WAY (LEFT ARROW) S3 R6-2 ONE WAY (LEFT ARROW) S4 W17-1 SPEED HUMP S5 W17-1 SPEED HUMP S6 R1-1 NEW STOP SIGN S7 R4-11 BIKE MAY USE FULL LANE S8 131-1 NEW STOP SIGN S9 R3-2 (LEFT ARROW) W1-7 (TWO WAY ARROW) S10 R3-1 (RIGHT ARROW) S11 D11-1 BIKE ROUTE D1-1 (TO GREEN RIVER TRAIL) S12 R4-11 BIKE MAY USE FULL LANE S13 W11-2 PEDESTRIAN CROSSING W16-7P LEFT ARROW R6-2 ONE WAY (LEFT ARROW) S14 W11-2 PEDESTRIAN CROSSING W16-7P RIGHT ARROW S15 W11-2 PEDESTRIAN CROSSING W16-7P LEFT ARROW 136-2 ONE WAY (RIGHT ARROW) S16 W11-2 PEDESTRIAN CROSSING W16-7P RIGHT ARROW S17 R4-11 BIKE MAY USE FULL LANE S18 R6-2 ONE WAY (RIGHT ARROW) S19 W6-3 TWO WAY TRAFFIC S20 R5-1 DO NOT ENTER S21 R5-1 DO NOT ENTER S22 R3-5 RIGHT TURN ONLY �;zlllz 71 �. h \ \ ? Sil 1 \ _A\ S22 Q� S21 S20 \ / S19 / \ j �\ NEW PARALLEL CURB RAMP FOR PEDESTRIANS \\\ S2 REMOVE STOP BAR - S3 AND STOP SIGN - S18 �� \ \ \ / E PROPOSED BUFFERED WALKWAY / SPEED \ \ HUMP I S17 \ \ S4 S5 < \ PROPOSED BUFFERED _ S16 1 WALKWAY REMOVE STOP BAR AND STOP SIGN S155 C S12 \ NEW CROSSWALK S6 S8 I' S10—'P GP/ S 137TH ST S7 S9 — t REMOVE STOP BAR W ADD BUFFER TO AND STOP SIGN QI EXISTING WALKWAY 771 NEIGHBORHOOD TRAFFIC CALMING 53RD AVE S RE-ROUTE 53RD AVE S CONSTRUCTION 2' 10' MIN BUFFER 6' WALKWAY NB LANE W/ SHARROW EDGE STRIPE BUFFER STRIPE W/ GORE STRIPING TYPICAL SECTION A -A NTS S 137TH ST CONSTRUCTION 2' EXISTING WB LANE W/ EB LANE W/ SHARROW SHARROW \DOUBLE YELLOW CENTERLINE BUFFER STRIPE W/ GORE STRIPING TYPICAL SECTION B-B NTS 52ND PL S CONSTRUCTION 10' - 13' SB LANE 5' MIN WALKWAY EDGE STRIPE 1' BUFFER STRIPE TYPICAL SECTION C-C NTS PLAN N 0 20 40 80 120 SCALE IN FEET KPG Interdisciplinary Design SEATTLE Tacoma 9101 Eiro Z Wenatchee suue4000 wn98121 Bellevue (24 1640 wewi.k,g