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Home My WebLink AboutTIC 2018-10-22 Item 2B - Update - South 140th Street / Tukwila International Boulevard Crosswalk Traffic Calming and Safety ImprovementAllan Ekberg, Mayor Public Works Department - Henry Hash, Director UNFOR ATIONAL E ORANDKU TO: Transportationamd Infrastructure Committee FROM: Henry�$h Pu�|i��r��reotor ^/^/ � " �yv BY: Cnndy Knighton, Senior Program Manager CC: Mayor Ekberg DATE: October 19, 2018 SUBJECT: Traffic Cm|nm/nq/SafmtyImprovements FYiprifimo ISSUE Update the Committee on the prioritization process on traffic calming requests and safety improvement needs. BACKGROUND During the September 1O.2O1OTransportation and|nfiastructuneConnnniUeennmat|ng.staffpremenbada|iot of locations where traffic calming treatments have been requested on residential streets as well as 8 locations on commercial streets where safety improvements have been identified. The Committee directed staff tobring back the list with some prioritization of'the projects forfurthgrdioouesion. DISCUSSION Staff scored the residential locations applying the existing criteria and pointochodu|e in the Neighborhood Traffic Calming Program (NTCP) on the 8locations where full data was available. The remaining 13 locations have not yet been scored as the necessary data collection has not been completed. While working through the scoring nriterio, staff sees the need to revise the criteria in some locations to accommodate locations near all major pedestrian generators and not just H-12 nohno|e. The highest scoring location for the residential locations is currently the G144m Street at46mAvenue 8intersection where Rectangular Rapid Flashing Beacon (RF|FE) has been installed at the marked crosswalk. This location is portion of |mqgor project to improve safety for school children that Tukwila applied for oSafe Routes to School Grant earlier this year. Project awards have not yet been announced. On the commercial locations, the NTCPscoring criteria cannot beapplied enit|odesigned for residential and collector streets with Average Daily Traffic (ADT) volumes of 7,000 or less. Some of the commercial locations have begun design using Traffic Impact Fee funds and one location has already received funding for design and construction through arecently awarded grant. Staff has assigned some preliminary rankings after considering the known urgency of need, status on design, funding availability, and engineering judgement. ADA Accessibility Scores have been included for both the residential and commercial locations. This information could be considered as a factor when assigning a priority ranking as it addresses safety and accessibility needs. RECOMMENDATION Staff recommends continuing refining the scoring and ranking system in the NTCP to meet the needs and priorities of the City. ATTACHMENTS w Priority List for Traffic Calming and Safety Improvements ° Map ofLocations * Scoring vvorkeheetfroMn the Neighborhood Traffic Calming Program w:\pwpng\ppNects\a'=v&,npo;acta\traffiovo|mingVnfonnationmemo - traffic calming &' safety improvement ranking 10-22' 1D.dncx 1 2 co Priority List for Traffic Calming and Safety Improvements ADA Accessabili Identifier Rank ty Score R-18.A 1 35 NTCP Score 18 Residential Locations S.144th at 46th Ave S Safety issue(s) School Crossing safety Average Volume 7,400 (13 hrs) Average Speed 23 85th %ile Speed 28 PDO 2 2013-2017 Peda-cyclist 0 Accidents Injury 0 Fatality 0 Potential Revisions/Improvements Option 1 RRFB with remarked crossing $ 13k Comments RRFB is ordered, to be install before school year. Safe Routes to School Grant R-18.B 2 n/a 9 5.148th St at 4400 blk Speeding 1,300 21 26 1 0 0 0 Speed Cushions/pair 17k R-18.0 3 n/a 8 Macadam rd s at 13700 blk Speeding/school bus stop safety 2,500 26 29 0 0 0 0 Permanent Radar sign 6k R-18.D n/a 7 5.164th at 4700 blk Speeding 1,800 25 30 0 0 0 0 Permanent Radar sign 6k R-18.E 4 25 7 42nd Ave Sat 11900 blk Speeding 3,800 23 29 1 2 0 0 Speed Cushions/pair 17k 85%tile is low but regular dangerous violators R-18.F n/a 7 44th Ave S at 11800 blk Speeding 700 17 21 1 0 0 0 No Action No evidence of a speeding issue. PD and radar sign studies. R-18.G 25 6 51st Ave S 16200 Block Speeding 3,300 25 30 3 0 0 0 Permanent Radar sign 6k R-18.H 15 4 S.140th at 3500 blk Speeding 3,700 20 25 0 0 0 0 Permanent Radar sign 6k R-18.l 15 3 53rd Ave Sat 5.140th Speeding 3,000 23 28 0 0 0 0 Speed Cushions/pair 17k R-18.J 25 n/a 42nd Ave S at 13700 blk Speeding/curve safety 4 1 3 0 Led light warning signs (4) 8k Homeowner association claims 3 road departures in past year R-18.K 36 n/a 62nd Ave at 149th School Crossing safety/speeding 1,600 1 1 0 0 RRFB with remarked crossing 80k Design work complete for ADA improvements. R-18.L 16 n/a S.130th St at 37th Ave S Speeding 0 0 0 0 Speed Cushions/pair 17k No current traffic data, on schedule soon R-18.M 36 n/a 5.150th St at Thorndyke Elementary School Crossing safety/marked xing 1 0 0 0 RRFB with marked crossing 80k This was to be addressed with School remodeling R-18.N 36 n/a S.147th St at 59th Ave S School Crossing safety/marked xing RRFB with marked crossing 80k ADA ramp improvements required R-18.0 36 n/a S.144th St at Macadam Rd School Crossing safety/marked xing RRFB with marked crossing 80k ADA ramp improvements required R-18.P 25 n/a S.144th St at 44th PI School Crossing safety/marked xing 7,400 (13 hrs) Marked crossing w/signs and ADA ramps 13k ADA ramp improvements required R-18.Q 15 n/a S.144th St at 37th Ave S Crossing safety/marked xing RRFB with marked crossing 32k At Cascade view park R-18.R 36 n/a TiB at S.141st St Crossing safety/marked xing RRFB with marked crossing 190k Refuge islands and ADA ramps required R-18.S 36 n/a 58th Ave S at S.144th St Speeding No Action No evidence of a speeding issue. PD and radar sign studies. R-18.T n/a n/a 50th Ave S at S 125th PI Speeding Radar sign Temp/Permanent 6k No current traffic data, on schedule soon R-18.0 n/a n/a 5.132nd St at 33rd Ave S Speeding Radar sign Temp/Permanent 6k No current traffic data, on schedule soon R-18.V n/a n/a Macadam rd s at 13600 blk Speeding/truck traffic Speed Cushions/pair I his is signed tor no trucks, speed cushions requested Accessibility scores of 36 or higher are considered high priority locations $680k Priority List for Traffic Calming and Safety Improvements ADA Accessability Identifier Score C-18.A 28 Notes Commerical Locations Southcenter Blvd at 65th Safety issue(s) Speeding, left turn delays, high ped crossings Average Volume 9,300 COMMERCIAL Average Speed 35 85th %ile Speed 40 LOCATIONS PDO 10 2013-2017 Peda-cyclist 2 Accidents Injury 1 Fatality 0 Potential Revisions/Improvements Option 1 RRFB/radar sign/rechannel $ $190k Comments Signal warranted, radar sign and RRFB as interim C-18.B 26 Southcenter Blvd at 62nd Speeding, left turn delays, high ped crossings 9,300 35 40 10 4 4 0 Traffic Signal $750k-1M Existing RRFB C-18.0 25 TIB at 5.140th st Pedestrian safety and left turn delays 16,000 19 1 10 0 RRFB Traffic Signal $200k $750k-1M High pedestrian traffic area C18-D 20 * Andover Park East at Minkler Left turn delays 12,000 1 0 3 0 Signal revision & rechan $2M 60% design completed C18-E 20 * Andover Park East at Industry Dr Pedestrian safety and left turn delays 12,000 1 1 2 0 Traffic Signal $850k 60% design completed C18-F 15 + 5.133rd at SR 599 on/off ramp Left turn delays 10,000 7 0 2 0 Traffic Signal Roundabout $1.9- 2.4M Feasiblity report but no design C18-G 35 # West Valley Hwy at Ped bridge pedestrian access/safety 28,800 25 0 16 0 Full Pedestrian signal $750k-1M Currently under design for West Valley improvements C18-H n/a Flashing Yellow arrow revisions to signalized left turns throughout the City Pedestrian safety and left turn delays Varies List to be compiled on case by case studies. Many locations possible. $5k each FYA operation is safer for pedestrains and increases intersection capacity when used in lieu of protect only phasing. * 60% design is complete, project is shelved pending additional funding + Feasibility report is complete # Grant funds for design and construction in hand, negotiating scope and fee for design $6.6 - $8.5M RESIDENTIAL LOCATIONS R-18.A LUPW EnEOGIStGeneral Meps1Streels_91x17_Sep12Q1 E.mrd Dale: 094SM S By: R. LYnsaa KnENT City of Tukwila S Not to Scale Vicinity Map Disclaimer: The location of features and boundaries are approximate and are intended for reference only. Data is based on best information available, rn xa 0 rn z r 0 C? 0 Z 0) OGISiii G�5dY8tl d.#ap6Y9'.IYeetlS_1 rJO Dare: C-18_F Stlrmole/ C-18.A. C-18.G City of Tukwila s No to Scale Vicinir ib ap Disclaimer: The location of features and boundaries are approximate and are intended for reference only. Data is based on best information available. C) 0 1 1 C 0 0 0 C's Tukwila Appendix C: Priority Point Worksheet. Location: Date: Staff Name: Categor Points 1. Accidents: 1pts for each recorded accident of the roadway for the past 3years 2. Volume: Average daily traffic volumes (weekday) divided by 100 3. Speed: 5pts for every mph more than 5-10mph above the posted speed limit 4. Sidewalks: If sidewalks exist Opts; if not 5pts 5. School: l Opts for each school within the impacted area Total Points: Speed, Accident and Volume Data Volume = 85% Speed = % 10mph above = Basis for Point Assignment Chart Criteria Basis for Point Assignment Accidents 10 points for each recorded accident of roadway for the past three years total (5 points will be added if there an injury reported) Speed 5 points for every mph greater thanl0mph above the posted speed or [(85th percentile speed limit — 10 mph — posted speed limit) x 5 points] Volume (Residential) 1 point for every 200 vehicles Average daily traffic volumes (weekday) Volume (Collector) 1 point for every 500 vehicles Average daily traffic volumes (weekday) Sidewalks 5 points if there is not a continuous sidewalk on one side of residential streets or both sides of collectors Schools 5 points for every school within the impact area and 2 points for school property within 500 ft of the impact area 7