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21-101125-UP-Traffic Report Text and Graphics-09-14-2021-V3{ Tacoma Federal Way (File #21-101125-UP & 21-101126-SE) Federal Way Fi f SOUTH 348TH STREET MIXED USE SITE ACCESS TRAFFIC IMPACT ANALYSIS - updated August 30, 2021 eni Al °el 348th street Y e Jake Traffic Engineering, Inc. Mark J. Jacobs, PE (OR & WA), PTOE, President 2614 391h Ave. SW - Seattle, WA 981.16 - 2503 Tel. 206.762.1978 - Cell 206.799.5692 E-mail iaketrafFic@c_omcast.net CITY 4f .: Federal Way z 3 ��, WASHINGTON T{-) »b J IT E . Jake Traffic Engineering, Inc . i STOP 0 - LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen 2711 West Valley Highway N., Suite 200 Auburn, WA 98001 Mark J. Jacobs, PE, PTOE President 2614 391h Ave. SW - Seattle, WA 98116 - 2503 Tel. 206.762.1978 - Cell 206.799.5692 E-mail jaketraffic@comcastnet August 30, 2021 Re: South 34811, Street Mixed Use - Federal Way (File #21-101125-UP & 21-101126-SE) Site Access Traffic Report -Update Dear Mr. Jacobsen, I have prepared this updated report to reflect site plan refinements and City feedback conducted subsequent to my South 348th Street Mixed Use Site Access Traffic Report - Revised March 18, 2021. This report was prepared for a mixed -use project located in the southeast corner of the 1st Ave. S at S. 34811 St. intersection comprising: ➢ 240 apartment units with 3,500 sf of leasing and tenant amenity space ➢ 12,420 sf commercial/retail space ➢ 2,000 sf coffee shop or other restaurant type use ➢ --450 parking stalls Subsequent to my report there have been a few minor refinements to the commercial/retail space as follows: Stand-alone retail building// 7,523 square feet, of which approximately 2,100 is the drive-thru tenant. The remaining 5,423 is general retail. Commercial area in the podium building// 10,769 square feet, of which 1,380 is "Clubhouse Amenity", 7,174 is lobby, 1,589 is fitness, and 626 is bike storage & bike workshop amenity. The changes include a slight increase in the space of the drive -up service tenant to 2,100 sf from 2,000 sf, a decrease in the general retail space from 12,420 sf to 5,423 sf and the balance of the space used for Apartment Tenant Amenity space. These changes do not materially affect the Site Access Traffic Report conducted. However the City requested the report to be updated to reflect the noted changes and to cap the on -site shared traffic percent to 20 percent per discussion in the South 348th Mixed -Use Response Memorandum dated July 24, 2021. The site has three existing curb cuts with two on 1st Ave. S. and one on S. 348th Street. The site plan shows four driveways with the southernmost and easternmost that were initially for c\—Pro ,l Ftics\2P 021 ­13<&h ar ]st Nrxed uoe fVw.......id uoaae aoc LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 31, 2021 Page -2- emergency access are now proposed to enhance site access. The accesses on 15t Ave. S. would be full access, the western driveway on S. 348t', St. would be right turn in/out only and the eastern access on S. 3481h St. is envisioned to be a 3/a driveway with left turn in and right turn in/out. I have corresponded with the City of Federal Way staff regarding this revised report and access refinements, see attached 11.17.2020 email. The City requires the site access traffic operation be reviewed. The City's Concurrency Traffic Model is used to ascertain site traffic affect to the City street grid. Traffic impact to the City is mitigated via payment of a Traffic Impact Fee that will be further discussed later in this report. I have reviewed the site and surrounding street system. The general format of this report is to describe the proposed project, identify existing traffic conditions (baseline), project future traffic conditions and identify Agency street/road improvements (future baseline), calculate the traffic that would be generated by the project and then add it to the future baseline traffic volumes. Operational analyses are used to determine the specific project traffic impact and appropriate traffic mitigation measures to reduce the impact. The SUMMARY, CONCLUSIONS AND RECOMMENDATIONS begin on page 17 of this report. PROJECT INFORMATION Figure 1 is a vicinity map which shows the location of the site and the surrounding street system. Figure 2U shows the site plan provided to me prepared by Graves & Associates Architects dated August 25, 2021. The plan, similar to the prior plan, depicts 10 buildings (eight residential and two commercial buildings with one including the leasing/tenant amenity space), 429 parkingstalls including garage parking and two accesses on each 15t Ave S. and S. 348th Street. The access on 1st Ave. S. replaces the existing two curb cuts with new full access curb cuts and access on S. 348th St. uses the existing curb cut, right in/out only, and adds a driveway at the sites eastern boundary that is proposed to be a 3/4 access, left turn in and right turn in/out only. Full development and occupancy of the proposed South 34811 Street Mixed Use project is anticipated to occur by 2024 presuming the permits are issued in a timely manner. However, to ensure a conservative access analysis 2024 has been used as the horizon year. �1:169�1►i4'1�►Dlla��il Protect Site The site comprises five undeveloped parcels of land, parcel It's 9129400010, 9129400020, 9129400030, 9129400040 and 912940TR-A. An aerial image of the project site obtained from King County IMap, augmented, is depicted below. C\—r�gre:=aes\zn_sez,-SOYtr 3aSR at to �.laetl-:�--M1w hu rtee'ai way-J.ugi.zOC'n\`�3aa�w�mmx4iK�aJsesueneccss��a.upame tle: JTE, Inc. LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -3- Street System Map III-5 from the City of Federal way Comprehensive Plan Chapter Three Transportation is depicted below: Clty nl Falwal Way Comprenan5vo Pia. Functional Classification of Existing and Planned South 348th . Streets and Highways Street Mixed Use � - f'N.' Federal Way City Limits . / - Potential Annexation Area / � o I V Freeway _. -- - Principal Arterial Minor Arterial Principal Collector Minor Collector 41 l z Stale: r I 1 Federal Way MAP 111-5 C�-Proleer Files\2016.62i South 348N at 1st Miratl Ilse-FNWInc FetleralWry�pug�s12020\534611r5VeelMiKed8se 5rteRcc...TIA Update. d,, COLOR COPY a 4i.y LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -4- Both 15t Ave. S. and S. 348th Street are designated as Principal Arterial streets. Figure 3 shows the existing traffic control, number of lanes, number of approach lanes at the intersections affected by site traffic and or near the site and other pertinent information. Alternative Transportation The site is located in the Federal Way area that is served by multiple transit agencies, Metro, Pierce and Sound Transit. I have reviewed the respective agency's web sites for service near the proposed project site. The site is served by Metro Transit Route i®'. ; more information on this route and other available service is available at the Metro Transit website: http://metro. king_cou nty.ov/. Below is a portion of Metro Transits System Map September 2020 near the site: hfl T"k'EI�Ici&ty�x.8� Ceiebiatiofi ; Park South 348th Street Mixed 903 �,.. - Use DARr- Safeway g Pa e x st. Frands tR Twin Lakes Ho(yspital�L d3 903 DART ® 49th We South U>` S 349!'> Hylebc15, Federal : ,�=tlatjds wad 29th Sl NE ,.. Sunrise / United ;c> 5 "s 3 Methodist Church Neither Pierce nor Sound Transit provides service at the subject site. ➢ Pierce Transit website: http://www.giercetraftsit.or ➢ Sound Transit website: htti3s://www.,5oundtransit.o-Eg� Pedestrian Facilities (General) Curb, gutter and sidewalks exist on both sides of 1st Ave. S. and S. 3481h Street. Pedestrian activated signalized crossing exist on all legs of the 1st Ave. S. at S. 348th Street intersection. C \Pio�ect Fiies�2016 02� - so•.� as=tn et �� M.eb u:e FNWInc Fetlerul Wu��{u:gustl-0zC�S3a8Mstree�Mveause-S�rNwesslw-update aoc IIOLOR CWIY ONLY JTE, Inc. LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -5- Commercial Shopping The proposed project is a mixed use including a pharmacy/drugstore. A WinCo grocery store is located about a 1/4 mile from the site. An on -site pedestrian path is provided that directly connects the grocery store to SW Campus Drive. Schools The development will be served by the Federal Way School District. Review of the FWSD htt�s://Www.upsd83.orV website identified the students would attend the following schools: y Enterprise Elementary School - 35101 5th Ave SW ➢ Illahee Middle School - 36001 1st Ave S Todd Beamer High School - 35999 16th Ave S FEDERAL WAY Students attending Illahee Middle School could be required to walk; about 3/4 mile, to and from school. There is a sidewalk on the west side of 15t Ave. S to S. 356th Street and to the south a paved pathway is provided to the school. The signalized 1st Ave. S at S. 356th St. includes a pedestrian activated signal crossing. The elementary and high school students would likely be bussed. Traffic Volumes Figure 4 shows the existing PM peak hour traffic volumes at the analysis street intersection. I obtained available AM and PM peak period turning movement counts conducted by Traffic Data Gathering, a firm specializing in the collection of traffic data, at the study intersection. The count data sheets are attached in the appendix. Intersection Operations Traffic engineers have developed criteria for intersection operations called level of service (LOS). The LOS's are A to F with A and B being very good and E and F being more congested. LOS C and D correlate to busy traffic conditions with some restrictions to the ability to choose travel speed, change lanes and the general convenience comfort and safety. The procedures in the Transportation Research Board Highway Capacity Manual, HCM 6th were used to calculate the level of service at the study intersections. The fallowing table depicts the LOS and corresponding average delay in seconds at signalized and stop control intersections: G\'-ao�eci rileslio3a o2i-5cutn 3481n at ice MIeeE U. -FNW inc F,d IcTI—pd—d.. JTE, Inc. LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -6- Intersection Type Signalized E7 Level of Service B C D E F <10 >10 and <20 >20 and <35 >35 and <55 >55 and <80 >80 ywo—p—Control <10 >10 and <15 >15 and <25 >25 and <35 E>35:and < 5 0 >50 LOS Criteria The Transportation Element - City of Federal Way Comprehensive Plan Revised 2015 operational the City's operational goal. Policy TP1.2 is noted below. TP1.2 Develop a transportation system that achieves the follownig level of service (LOS) metrics: c) 5ipralized Intersection outside of City Center will experience a 1.2 vehicle -to -capacity (vic) ratio or lower o Unsignalized Intersection outside of City Center will ex:penience a 1.0 vehicle -to -capacity (v/c) ratio or lower E� The City Center area will experience an average 1.1 vehicle -to -capacity (v/c) ratio or less. o Faciligr completeness as described in the following pedestrian, bicycling. and transit priority areas level of service tables. LOS Analysis Software/Results The LOS and v/c of the study intersections were calculated using the Synchro software program. The City provided the baseline 2018 Synchro analysis. Table 1 shows the existing LOS operations of the study intersections. The study intersection is currently operating at with a v/c ratio of less than 1.2. Incident History Incident data was reviewed using the WSDOT accident data portal available online at htt s: remotea .wsdot.wa. ov hi hwa safe collision data ortal ublic . This portal was used to review incidents in the site vicinity for five years, 2016 to 2019. The WSDOT data is attached. There were 16 recorded incidents at the SW Campus Dr.-S. 34811 St. at 15t Ave. S. intersection in the four years inspected. These incidents correlate into an incident rate of C\--j—rft,\2016027-SoAb a461h.1 isi>n. xvd --FNW Inc F¢dnlTIw.Y,Ag-020%S34©thSVeW-dV,, Si[en¢¢ Uvds d,, COLOR COPY (ALY LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -7- about 0.3 per million entering vehicles (determined using the entering PM peak traffic and a K factor of 10). Accident rates of less than 1 per million entering vehicles at intersections typically indicate that the intersection is operating satisfactorily. Inspection of the 15t Ave. S. and S. 348th St corridors near the site indicates a few incidents occurring. No apparent incident problem exists on streets and intersections inspected. STREET IMPROVEMENT PROJECTS I have reviewed the City of Federal Way's 2020 to 2025 Street Improvement projects. A portion of the City's TIP map is depicted below. City project #13 is maintenance/street overlay work scheduled for 2019. 1 have attached the City's TIP data in the Appendix. HORIZON YEAR CONDITIONS "WITHOUT" THE PROJECT Figure 5 shows the projected 2024 PM peak hour traffic volumes "without" the project. These volumes include the existingtraffic volume counts plus background growth. The actual traffic growth per historical City of Federal way traffic data indicates that traffic volumes are relatively stable in the site vicinity that is consistent with a mature developed area. A 2% per year growth factor per correspondence with the City that ensures a conservative analysis was used. C�-Project cues\aQ1e oar souN 348N a� £st Mirea use %NWhc FeOe�a[ way�uugus�2•v�o�saaamsreeimi.eause srtearceasnnupaamaoc fULOR copy ONLY JTE, Inc. LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -8- TRIP GENERATION AND DISTRIBUTION Definitions A vehicle trip is defined as a single or one direction vehicle movement with either the origin or destination (exiting or entering) inside the proposed development. Traffic generated by development projects consists of the following types: Pass -By Trips: Trips made as intermediate stops on the way from an origin to a primary trip destination. Diverted Link Trips: Trips attracted from the traffic volume on a roadway within the vicinity of the generator but which require a diversion from that roadway to another roadway in order to gain access to the site. Captured Trips: Site trips shared by more than one land use in a multi -use development. Primary (New) Trips: Trips made for the specific purpose of using the services of the project. Trio Generation The proposed S. 348th Street Mixed Use project is expected to generate, the vehicular trips during the average weekday, street traffic AM and PM street peak hours daily and estimated Saturday site peak hour as shown in Table 2U (updated to reflect the refined Site Plan and City feedback). The trip generation for the project is calculated using trip rates from the Institute of Transportation Engineers (ITE) Trip Generation, 10th Edition, for Mid -rise Apartment, Retail and a potential Coffee Shop or Fast Food Restaurant with Drive Up Service (ITE Land Use Codes 221, 820 and 937, respectively). All site trips made by all vehicles for all purposes, including commuter, visitor, and service and delivery vehicle trips are included in the trip generation values. The City indicated to be conservative on the Trip Generation projection. The ITE data for Coffee Shop is higher than ..JT L., ir;. obtained traffic data for coffee shop, further it is higher than other restaurant categories thus ensuring a conservative analysis.. Coffee shops tend to attract a significant amount of pass -by traffic. The Rainier Valley Starbucks Traffic Impact Analysis dated January 3, 2000 by Transportation Planning and Engineering, Inc, pertinent data attached, provides pass -by rate data during the AM and PM peak time periods. The rates for the AM and PM peak hour are 61 and 49%, respectively. The daily pass -by rate is determined via Traffic Engineering inspection. _-A-120'6Ii1 Scutt 345tP at lsiM:xetl Jsc. rNN.int. CeJe'ai m'ae�^e�&us?0. ©M1S_m_�.nxu-uUua�e doe LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -9- The retail commercial facilities include pass -by traffic. The ITE Trip Generation Handbook 3rd Edition provides pass -by data for a variety of land uses. A retail center is noted to have a pass -by rate of 34% during the PM peak hour (reference Table E.9). In addition pass -by traffic; there would be shared trips between the residential and commercial uses. Chapter 6 Multi -Use Development in the Trip Generation Handbook provides a methodology to estimate shared traffic. The National Cooperative Highway Research Program (NCHRP) has developed an estimation tool based on the ITE methodology to estimate the internal trip generation. I have input the site traffic data into the NCHRP 684 tool that indicates 12% and 34% of the site AM and PM peak hour trips would be shared, respectively. A copy of the NCHRP 684 results is attached to this report. Pertinent data from the NCHRP is below: Table 5-A- Computations Summary Total Entering Exiting All Person -Trips 276 120 156 Internal Captme Percentage 12Y 14/ 11% External Vehicle-Tri s5 242 103 139 External Transit -Trips' 0 0 0 External Non -Motorized Trips I] 0 0 Table 5-P: Computations Summary Total Entering Exiting All Person-Tnps 240 132 108 laternalCapture Percentage 34% 31% 3&'QA External Vehicle -Trips` 158 91 67 External Transit -Tr se 0 0 0 External Non-hiotorrzed Tri s�3 0 0 0 Table 6-A: Internal Trip Capture Percentages by Land Use Land Use Entering Trips Exiting Trips Offioe NIA NIA Retail 29Y 20Y Restaurant 15Y. 2'/. ClnemalEntertalnmEnt NIA NIA Residential 5% 22'/. Hotel NIA NIA Table 6-P: Internal Trip Capture Percentages by Land Use Lard Use Eniering Trips Exiting Tnps once MA WA Retail 61 % 54% Restaurant 30 c 47% CinemaFEntertamrnent WA NfA Residential 22% 20% Hotel WA WA City staff believed the internal trip percentage used was higher than their expectation. A Coffee Shop as envisioned would likely become a gathering spot for residents of the facility thus a higher shared traffic percentage as noted. In response to City feedback I have capped the internal capture percent at 20 percent. The project is projected to generate 143 net new AM peak hour trips and 133 PM peak hour trips. These values are generally consistent to what was studied in South 348th Street Mixed Use Site Access Traffic Report - Revised. The net new AM peak hour trips was not changed and the number of net new trips to the City street grid slightly increased by nine trips. Traffic at the site driveways during the AM peak period increased by two trips and during the PM peak hour is 22 trips fewer. I also conducted a review of Saturday traffic generation per past correspondence with the City. Each site use has differing peak hour of generation with the estimated Saturday peak comparable to the weekday PM peak hour peak. Prior site data collection in 2016 showed the Saturday street hour peak volume of 3,296 entering vehicles at the 15t Ave. S at SW c�-amlecr Fiies�2oi[..o21- snsur 348rn at vt Mrxetl Ilse WlWIncFetlerel WeyVwguat2020\53a81M15Vee�rniKdUae-SRea�easzW-Vpa� aoc CUI OR COFY ONLY JTE, Inc. LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -10- Campus Dr - S. 3481h Street intersection as compared to 4,017 during the weekday PM peak hour. Thus the focus of this report is the weekday AM and PM street peak hours. Trip Distribution Figure 6U shows the project generated trips assigned to the adjacent street system based on the City of Federal Way traffic Model and the characteristics of the street network, existing traffic volume patterns, the location of likely trip origins and destinations (residential, schools, employment, shopping, social and recreational opportunities). HORIZON YEAR CONDITIONS "WITH" THE PROJECT Traffic Volumes Figure 7U AM and 7U PM shows the projected 2024 AM and PM peak hour traffic volumes "with" the proposed project at the analysis intersection, respectively. The site generated AM and PM peak hour traffic volumes shown on Figure 6U AM and PM were added to the projected background traffic volumes shown on Figure 5 to obtain the Figure 7U AM and PM volumes. Level of Service Table 1 depicts the calculated LOS and the northbound left turn and through traffic queues for the horizon year (2024) "with" and "without" project conditions at the analysis intersections, updated for the 2024 with project conditions. Based on my operational analysis using the City 2018 Synchro data as a base the study intersections would operate at LOS 'D' or better for both "with" and "without" project during the PM peak hour. During the AM peak period the operation is calculated to operate at LOS 'E'. The City's operational criteria is v/c (volume to capacity) not to exceed 1.2. The v/c ratios with the project do not exceed City criteria. The City periodically refines signal timings, as such I conducted operational analysis using the City's 150 second cycle length and optimizing the green times for the traffic movements. With optimized timing the average delay is reduced to 65.9 seconds in the AM time period from 73.9 seconds and during the PM a minor drop to 49.2 from 49.9 seconds results. Site Access Review The proposed project would have access on 1st Ave. S. utilizing the existing two curb cuts and access on S. 348th St. using the existing curb cut and adding a driveway to the east at the property line. This new driveway is located about 500' east of the westbound to southbound left turn stop bar at the 1st Ave. S. at S. 348th Street signalized intersection. The 500' spacing provides sufficient spacing to allow for site traffic to turn left into the project site. Allowing the ingress left turn reduces left turning at 1st Ave. S. and at the sites 1st Ave. S. access driveways! F\-a���cci fiic�\202o D2' FNW ins Ise— CX)LOR COPY ONi 7 JTE, Inc. LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -11- have discussed and provided the City initial technical data identifying that allowing the westbound to southbound left turning at the site's eastern boundary would operate satisfactorily. Two items noted by the City were: 1. Is the access sufficiently spaced away from 1st Ave. S. to avoid the westbound to southbound left turn queuing? 2. And two would the access conflict with the driveway operation on the north side of S. 348th St. that is located about 120 to 125' east of the proposed driveway centerline to centerline? The access discussion in my August 2019 report was focused on the 1st Ave. S. access. This was do to limited access on S. 348th St. that required residents and customers coming from the east on S. 348th Street to turn left at both 1st Ave. S. and again at the site access. The second left turn was contra flow to the northbound to westbound left turn at the S. 348th Street intersection. Facilitating the westbound to southbound site traffic at the new access reduces left turns at 1st Ave. S. and significantly lowers the ingress left turns at the 1st Ave. S. accesses that are both positive results. Item #1 - The maximum projected westbound to southbound left turn queue at the 1st Ave. S. at S. 348t', St. intersection is 329' that is well the 500' spacing, thus proposed east site access has sufficient spacing away from 1st Ave. S. to facilitate ingress left turn traffic. Item #2 - Regards the spacing between the site's east access and the driveway on the north side of S. 348th Street. This driveway serves a 10,760 sf office building per King County data. The traffic from the office is depicted in the following table and is based on Tri Generation data: DaSTM OMCE - TFW C-F—W iARON Twm Pmodf I S ¢e QD I TG Ram I Er r % I B iter Trams I Eaat % I Extt Try I TriP To (T) ExishW& Offlae OTE LLFC 712; 10,760 0 - Stze and use per wig Comly Map data `k o°e,c— :'Jay 1C'r i :q0 9.74 5 Mr , 524 5&, 52A L04.8 AM peak licur iC, 76.0 1.16 8 % 1.' 143�, 1.71.2 5 F'M peak. hr,,ur 10. 760 1.15 1 2 Of 84?,: 10.4 12.E where?d: = units der i,C}00 sf; j = Trips Nate: Due tG munding some valuers may nGt add up The existing building is projected to generate about 13 AM and 12 PM peak hour trips. These trips are distributed consistent to the data provided by the City for the subject project and are shown on Figure 7 AM and 7 PM. The traffic operation of the driveway of this existing driveway is noted below: 2024 AM - EBLT LOS `A' little queuing 2024 PM - EBLT LOS 'C' little queuing C \-Project Files\2o1�.0�� - sosui 3a&n at ur M.en uae R1WIncFctl•_rei Wey\4•g�>tZ�2C\53asenseeerrnivause-srtcaccesaf u-upaa[� doc CGL09 COPY O'Sl. i' LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -12- In both the AM and PM peak periods the traffic turning into the office from the west is extremely low, seven vehicles in the AM peak hour and one during the PM peak hour. Concurrent with the existing traffic the proposed project is projected to have 29 and 33 trips entering the site from the east during the AM and PM peak hours respectively. These are also relatively low traffic volumes. Site generated left turning traffic is contra flow to the traffic turning left at the office. The total left turn traffic is sufficiently that the probability of them occurring at the same time is relatively low. The City requested that the channelization be enhanced to discourage left turning motorists from entering the two way left turn lane too quickly. Figure 8E and 8F provides the Existing and proposed Future Street Channelization (Conceptual) plans for the site access. Below is a Conceptual Access Channelization for the S. 348th St. east access. This conceptual plan has been provided to the City. The plan would remove —25' of `C' curb, extend the extension striping about 100' and use double yellow markings to discourage left motorists from entering the left channelization to quickly. A right turn channelization island would be installed at the driveway. Site Access Sight Visibility Below are photographs taken at the primary 1st Ave. S. (north access), the S. 3481h Street (east access) driveways and the existing office driveway, respectively: C\-i41—Fii-015027 S-h NBit et-M-d:se -FWWInc-s d—I dw COLOR iORYONLY LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -13- _,. C\-Pmle[IFllec\2016.D27 S-34S—,tM-1 Vse-FHWIcc Feticraf Way\4ugw12020\53E6iN5rree[MIKedVse SrteAxessTlFVpdats.tlo[ CC)LOR COPY ONLY LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -14- c.�-no�ect iiies�201602i SoutM1 34BtM1at1st MiRetl Vse-FNH'-ino-Feaaraiway`negust2020s,5348tM15t.e ,e edUseS,te ,e ,TlkUpd-.da t.:OE AR COPY ONLY JTE, Inca LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -15- Per my field inspection good sight lines exist at the site accesses, presuming that vegetation is properly maintained and no signage is improperly installed in the sight line triangle. Garage Access A residential garage, P3, providing —65 parking stalls is accessed via the north driveway on 1st Avenue South. This access provides about 75' of storage to the garage door and five temporary parking spaces; see below: C:\-Projec4 Files12o16027-soum 348ih at1n Miretl Lse TNWInc Federal WayWa$�9��2o�5a4811:5veetM'uetlllee SiNAc s—TIA Upd-d., COL.C,R COPY ONLY LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -16- The garage access is governed via a door that would be activated via the residents entering into the garage. I have conducted a queuing review to evaluate the adequacy of the proposed stacking that provides space for about three vehicles and temporary parking spaces. There are a number of queuing models available online. The model utilized was developed by: faculty. washington.edu/mhillier/gmeth551/Queueing%20Models.xls Input items needed for the above model are arrivals and service rate per hour. The arrival is a portion, less than 1/2 (-65 residential stalls/-181 of the residential structured stalls) of the 51 entering residential PM peak hour trips of the multifamily component of the project; all assigned to the one entry point. The residential entering trips are derived using the projected 83 driveway trips associated with the residential portion of the project with 61% projected to be entering the site. Each resident of the project would be provided electronic gate opening device to operate the garage. I estimate, based on observation, the garage would open in about 15 seconds, thus 240 operations per hour as the service rate. And to ensure a conservative entering volume, 30 residents are projected to use this entry point during the Pm peak hour. The model results are depicted below: a 9 0.6 0 0.4 Q 0.2 Data — 30 (mean arrival rate) µ — 240 (mean service rate) s = 1 (# servers) o N IV 1b �x 'a Co A -o Cb ,,o ,,� N11 <3 N, N<3 ,Ip ,,,\ �. No Number of Customers in System n P7 C: 0 876 1 0 109375 2 0 013b71875 3 0 001708984 4 0-000213623 5 .2. G20E-05 6 3 33786E-0 7 4,.17233E-07 8 5-21541E-08 The probability of more than three vehicles in a queue is less than 0.1 percent. The turnaround to the east of the garage entry provides additional space on site to provide supplementary stacking in the rare instances when it may be needed. C�-?-o�em FBee :2S16021 --1 a: ZS SFx=1 ❑m F"I'.- e0�a -r �, «20 ,bd98., i..�tttMiax �a SteAcexssilM1ilptlaP tloc LANDMARK DEVELOPMENT GROUP Attn: Brett .Jacobsen August 30, 2021 Page -17- AGENCY TRAFFIC IMPACT MITIGATION REQUIREMENTS The City will require that the project site access and circulation be constructed in conformance to City requirements. The City has a Traffic Impact Fee program per Ord. 09-627 effective July 1, 2010; see attached information obtained online 08.30.2021. Each use has an identified TIF rate that includes a trip length factor. The proposed use is a mixed use thus the use of the City's fee peruse would overestimate the Traffic Impact Fee. Further the City's TIF costing data indicates that the base trip generation rates are based on out of date Trip Generation information. The City's 2021 TIF rate per Multi -Family unit is $3,314 that is based on each unit generating 0.62 PM peak hour trips. The proposal is for mid -rise apartment units that generate 0.44 PM peak hour trips per the Trip Generation loth Edition. Thus the appropriate TIF rate per current ITE data is $2,252 ($3,314 * 0.44/0.62). In addition, the proposal is a mixed use that likely would include a coffee shop and other retail uses. This shared use is projected to reduce the off -site traffic generated by the residents by about 20%, presuming a Coffee House/Restaurant use. Accounting for the shared trips the resulting TIF for each residential apartment unit would be $1,882 ($2,352 * 0.80). Similar refinements to the commercial uses would also be appropriate, when the uses are determined. Traffic impact fees do not vest and are due at the time of building permit based on the fees current at that time. The preparation of an Independent Fee Calculation per FWMC 19.91.070 Independent fee calculations would be appropriate to account for the shared use activities on the site. SUMMARY, CONCLUSIONS AND RECOMMENDATIONS This updated report analyzed the traffic and parking impact of the proposed S. 348th Street Mixed Use located in the southeast corner of the 1st Ave. S at S. 348th St. intersection in Federal Way. The proposed project includes, 240 apartment units with 10,769 sf of leasing and tenant amenity space, 5,423 sf commercial/retail space and a 2,100 sf coffee shop or other restaurant use with drive up service. Access to the site is proposed via four driveways with two on 1st Ave. S. and two on S. 348t" Street. The two existing curb cuts on 1st Ave. S. would be replaced with two driveways, the existing curb cut on S. 348th St. would be used and a new access driveway to the east would be installed. Existing traffic data was obtained at the street intersections identified far analysis. Future horizon year traffic volumes were derived using a growth factor of 2 percent per year. Level of service analyses were performed for existing and projected future horizon traffic volumes during the weekday PM peak hour. The evaluation of the traffic impact of the proposed project included adding project generated traffic (very conservative data used) to the future c—aro�ect Fllas�O1G 02' 3�811 11.1sn-,i Us FN':.— FaeerelW aec COLOP COPY ONLY J TE, Inc® LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen August 30, 2021 Page -18- traffic volume projections and calculating the level of service. The "with" project traffic operations were then compared to the "without" project operations. The comparison of traffic operations "with" and "without" the project identified that the project would not cause a significant adverse affect on the operation of the study intersections. In addition, sight lines and safety inspection were conducted at the study intersection/driveways and no apparent deficiencies were noted. Based on my analysis I recommend that S. 348th Street Mixed Use be allowed with the following traffic impact mitigation measures. Construct project in accordance with applicable City requirements. Install site access driveways per applicable City requirements. i- Appropriate vegetation and signing restrictions need to be applied at the site accesses to ensure appropriate sight lines. y Enhance street channelization on S. 348th Street as Conceptually depicted on Figure 8 and discussed in this report. ➢ The preparation of a Independent Fee Calculation pursuant to FMC 19.91.070 Independent fee calculations to determine the appropriate TIF to be paid to the City If you have any questions you can contact me at 206.762.1978 or email me at iaketraffic@comcast.com. MJJ: mjj Very truly yours, Mark J. Jacobs, PE, PTOE, President JAKE TRAFFIC ENGINEERING, INC. 0S.3a ID2-1 c\-Project F,1e 2016027 5ou 348N at Ist Mired Use ,FHW1.e-federal w.yµ�gust2020�53E@M1SrreeiMlr:edllsa SEeAccessT—p—d,, COLOR C()PY ONLY JTE, Inc® TABLE 1- PEAK HOUR LEVEL OF SERVICE S. 348TH STREET MIXED USE - FEDERAL WAY SITE ACCESS TRAFFIC IMPACT ANALYSIS INTERSECTION APPROACH EXISTING 2024 W/O PROJECT 2024 W/ PROJECT (Updated) AM Peak Overall E (57.9) E (70.0) E (73.9) NBLT D (48.3) D (48.2) D (48.4) 1. 1st Ave. Sat 50/95% queue 39'/88' 42'/97' 55'/119' SW Campus Dr- NB Thru F (93.7) F (131.2) F (145) S. 348th St. 50/95% queue 315'/384' 359'/463' 385'/506' WBLT E (64.8) E (65.7) E (66.2) 50/95% queue 39'/58' 43'/65' 43'/64' Max V/C ratio 0.98 1.10 1.14 2. 15t Ave. Sat Overall -- - A (1.0) Site Access WB - - B (13.9) 3. S. 348th St. Overall - A (0.6) at Site Access WBLT - - B (13.4) NBRT - - C (16.9) PM Peak Overall D (45.2) D (48.6) D (49.3) NBLT F (106.4) F (112.5) F (101.3) 1. 1st Ave. Sat 50/95% queue 77'/152' 84'/175' 96'/1763' SW Campus Dr- NB Thru E (56.8) E (56.5) E (56.5) S. 3481h St. 50/95% queue 103'/160' 113'/189' 123'/205' WBLT D (51.8) E (58.3) E (55.6) 50/95% queue 228'/285' 262'/331' 259'/311' Max V/C ratio 0.88 0.89 0.89 2. 15t Ave. Sat Overall - - A (0.5) Site Access WB - - B (12.3) 3. S. 348th St. Overall - -- A (0.2) at Site Access WELT -- - B (10.2) NBRT - - B (12.0) V/C - volurne to capacity ratio; 2018 City Synchro data used as base Number shown in parenthesis is the average control delay in seconds per vehicle for the intersection as a whole or approach movement, which determines the LOS per the Hi hwa Capacity Manual. 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U LL j s+ m J H } O C� I x IC7 «_ coLU CS o EC: !�2 O r 3 � r t/y LiJ :1 ra Q O C r ;, ;3 rb a. ^` u J iti s_ V— Sti i4 CQ �Q C C Lu Lti LU E M Iz Project: South 348th Street Mixed Use - Federal Way Location: Southeast corner 1st Ave. S at SW Campus Dr.-S. 348th St. intersection NORTH xjytWdund - n - SR _2E1n F' S, 'arlYtn Rd rOYtR PVinl �f ._ twc5h.n�te fl� �. Tom' - Sta:G fL ""l� __Y. S jai. s 3a6'h St - S Z Q FOaral Way v' Hats Aub— 411 � m .y4Ytf bV?l. 4 s. x s352.ns 9'. s �. Cornrrrcne�arNba� o - � .x � � c� ntL 5, hE - c v -,55to-: t: 5 256i" SY �: cn CGb'Iro: Y m m i �- _.' , 3E4iP �.7 s tl ryBYth `t Project Sites 1 m� r a c 4 t n, rye Tacoma 94+;:t Pc11e lVvl S j Sh St tg � da E.hlarsha9_Awe y 9 4 r 61h_t 81n St e�-i9 f, N v E s EEen�St� ... 1Bl�9E ¢: p.' ;.. n r+-.1 ETay€,S".E 'E:n`_.Y R ura �1n..5t C; = rr 18Ih Si F Tsi w 2'Mh. E' E ..: a f 201h St E ;. 1'3 - St "'�3Ih 51 E � i t f%c Frte 24tn iY E a rR a - a,4 a m °i Edgrwoatl Icy Y w c = � 4 �kE T .. ... JTE, Inc. FIGURE 1 Reprint in Color Only SOUTH 348TH STEET MIXED USE - FEDERAL. WAY SITE ACCESS TRAFFIC REPORT - REVISED VICINITY MAP Project: South 348th Street Mixed Use - Federal Way Location: Southeast corner 1st Ave. S at SW Campus Dr.-S. 348th St. intersection Note: An 8.5 x 11" copy of the Site Plan is included with this report J! T E FIGURE 2U Reprint in Color poly NORTH Let R LLJ " LL' LLJ SneFuLgLE000 gloom SOUTH 348TH STEET MIXED USE - FEDERAL WAY SITE ACCESS TRAFFIC REPORT - REVISED SITE PLAN 1S H186£ 5 TS 3AV 1S1 _ 11IN _ y e?:�pq: S CD 07 `lOdS ]H1 SAHVIN X - 31lS isn a3XIW kvm 7vdiQ3d CD 2 99 HHUH-3 Y �¢-¢.44.}�}_.l,gg4qqq a �mw �P ..• � E a ., .. � n �a a ��� _ 1', 5, MOO VM AVM IV�3(13� 3sn-ci3xiN AVM !V'd3(13J �° ry �� al xsu t T� z�--- H1f1O53M1 IAV iSL 1st Avenue S. at S. 348th Street JTE, Inc® FIGURE 3 Reprint in Color Only Project Site Approach Lane & Direction Stop Sign Traffic Signal X Analysis I/S # # of Travel X-L's Lanes XX MPH Posted Speed Lim it Image obtained from '- King County lMap SOUTH 348TH STREET MIXED USE SITE ACCESS TRAFFIC REPORT - REVISED EXISTING STREET LANES AND TRAFFIC CONTROL 1+Vin0a � Foods � a LEGEND E� Peak Hour Traffic k Volume and Direction j Stop Sign S.o 348th Street S-IL ; 35 MPH . Nd: Traffic Signal In Analysis I/S # Hx # of Travel s. X Lanes l a - Speed In 'Posted s XX MPH Limit t cy :. Image obtained from v ....- King County ]Map 1A \ 1P yLf) 145 i N R 131 1elGle 399 F 1,086 76 Ae je 430 123 943 fi12 100 7l ;' n 104 - M N % vl AM Peak Wednesday 06.06.201E 0700-0800 FIGURE 4 Reprint in Color Only PM Peak Tuesday 06.05.2018 1630-1730 1st Ave. S at SW Campus Dr.-S. 348th Street SOUTH 348TH STREET MIXED USE SITE ACCESS TRAFFIC REPORT - REVISED EXISTING PEAK HOUR TRAFFIC VOLUMES NORTH -------------------- LEGEND Peak Hour Traffic -0* Volume and Direction Stop Sign Ah Traffic Signal Analysis I/S # # of Travel I X-L's Lanes Posted Speed XX MPH Lim it Image obtained from King County IMap 1A - 1P =- ,a0,n to 0 m ' N 165 \ a00 . 150 F F 450 Ile �� 1,225 i! 485 100 � **85 �I� 140 / 1,060 � 1 690 **A 115 N m �� 115 o i AM Peak PM Peak J TE, Inc. FIGURE 5 Reprint In Color Only 1st Ave. S at SW Campus Dr.-S.348th Street SOUTH 348TH STREET MIXED USE SITE ACCESS TRAFFIC REPORT - REVISED PROJECTED 2024 PEAK HOUR TRAFFIC VOLUMES WITHOUT THE PROJECT NORTH -------------------- LEGEND Peak Hour Traffic Volume and Direction m Stop Sign a,_ Traffic Signal * �l Analysis I/S # Image obtained from King County IMap cc CY) (-2) F (8] 1 35 (1 !— (-10y _ . 22 (5) 19 (10 -25 3 �I ao i �8 (24) **A�i cc IN 7 1st Avenue S. at 1st Avenue S. at S. 348th Street at S. 348th Street Site Access Site Access Sn GENERATED AM 'PEAK HOUR TRO PS Total Internal Shared Driveway (PassAM New Enter 121 16 105 () 55 E)dt 157 15 142 (55) 88 Total 1 ?7,9 31 247 (104)1 1 NUC &. h cunciing can result in miner trip rj rt;-:fent�al SOUTH 348TH STREET MIXED USE SITE ACCESS TRAFFIC REPORT - REVISED FIGURE GU AM SITE GENERATED AM PEAK HOUR TRAFFIC VOLUMES Reprint in color only AND DISTRIBUTION NORTH -------------------- LEGEND Peak Hour Traffic �1 Volume and Direction k Stop Sign Rr Traffic Signal X Analysis I/S # Image obtained from King County IMap 4—(-6) 23 (11) ] i (-3) 14 (6) +' _ 26 (10 3 q Nt to (-4) 7i 15 (q)Ln a. / / 1st Avenue S. at 1st Avenue S. at S. 348th Street Site Access S. 348th Street at Site Access SITE GENERATED PM PEAK HOUR TIRIPS InternalTotal SharW DIveway Was& W ler -12o 1 24 (21) 75 EAt 9 7 191 -M (n) 57 Tola1 � ,' 431 3741 (43-) NOter FKounuing can reswt in miriDrtrip diTT49*entlal JTEr Inc. SOUTH 348TH STREET MIXED USE SITE ACCESS TRAFFIC REPORT - REVISED FIGURE BU PM SITE GENERATED PM PEAK HOUR TRAFFIC VOLUMES Reprint in color Only AND DISTRIBUTION I NORTH Preat LEGEND Peak Hour Traffic —11N. Volume and Direction Stop Sign Traffic Signal } Analysis I/S # Image obtained from King County IM ap 1 A A -A M% Cq BF -AM \\ H00a 163 `i `i 437 1 S5 27 a- 295 100 ,1 x 1 062 `� \ 1,420 `­* 118 7l �i a h U) a 42 x N •� h � N h N ip 1st Avenue S. at 1st Avenue S. at S. 348th Street at S. 348th Street Site Access Site Access ei ri ` 4 713 7 t75 a S. 348th Street at Office Building Access JTE, 1,, SOUTH 348TH STREET MIXED USE SITE ACCESS TRAFFIC REPORT - REVISED FIGURE 71.1 AM PROJECTED 2024 AM PEAK HOUR TRAFFIC VOLUMES Reprint in culnr only WITH THE PROJECT . ^ r I—P I 0 149 4-- 1,219 00 ,� 482 1 f 693 440 '1 Nt/ 119 \ co°f LO m N ti 1st Avenue S. at S. 348th Street � a 1� 1,880 1 944 ; NORTH -------------------- LEGEND Peak Hour Traffic —� Volume and Direction 5 �I.! Stop Sign ' Traffic Signal IXI Analysis I/S # Image obtained from King County Map A -PM -,,\ B-PM N \ 34 4—1,850 20 36 �x I ..... k. 921LO �j 19 N M 1st Avenue S. at S. 348th Street at Site Access Site Access S. 348th Street at Office Building Access TES Inca SOUTH 348TH STREET MIXED USE SITE ACCESS TRAFFIC REPORT - REVISED FIGURE 7U PM PROJECTED 2024 PM PEAK HOUR TRAFFIC VOLUMES Reprint In Color Only WITH THE PROJECT J N a J LLI Z O G a z LV F O L v IL N_ W J = Z F- LL Z Vl LL Q x Q x OD F F N w M N W x W w oa � H W Z 0 U) R LIJ W o 0 W o NA = c : � c LL n m J a o a W W Z = W O G � V W I., Z ?K M O a a W W N W v W Z N LL a 00 H v m N W = W W I-. � O F O a `� N W W H N N O a O ac OD a T W a .�. W � e a" U. m I 44,