The URL can be used to link to this page

21-101125-UP-TrafficReport-03-23-21-V1j me, Kenl Federal Way AtIurn We ('D Federal Way SOUTH 348 TH STREET MIXED USE SITE ACCESS TRAFFIC IMPACT ANALYSIS - REVISED March 18,2021 Aake Traffic Engineering, Inc. Mark J. Jacobs, PE (OR & WA), PTOE, President 2614 391h Ave. SW - Seattle, WA 98116 - 2503 Tel. 206.762.1978 - Cell 206.799.5692 E-mail iaketraffic@comcast.net JTE . Jake Traffic Engineering, Inc. . LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen 2711 West Valley Highway N., Suite 200 Auburn, WA 98001 Re: South 348t" Street Mixed Use - Federal way Site Access Traffic Report- Revised Dear Mr. Jacobsen, Mark J. Jacobs, PE, PTOE President 2614 396 Ave. SW — Seattle, WA 98116 — 2503 Tel. 206.762.1978 - Cell 206399.5692 E-mail jaketrafc@comcast.net March 18, 2021 I have prepared this revised report to reflect site plan changes conducted subsequent to my South 348=h Street Mixed Use Site Access Traffic Repo dated August 8, 2019. Revised is the addition of access driveways, in particular the addition of a driveway in the northeast corner of the site that is discussed in detail in this letter, and the refinement to the unit count and commercial space. The site is located in the southeast corner of the 1st Ave. S at S. 348th St. intersection in Federal Way. The refined (prior data stricken out for informational purposes) project is envisioned to include: 2-64 240 apartment units with 3,500 sf of leasing and tenant amenity space 3,090 12,420 sf commercial/retail space 900 Sf Sit EIGWR sta „aR 4:0,000 sf pharmacy/drugsteFe with drive up se 2,000 sf coffee shop or other restaurant type use —450 parking stalls The site has three existing curb cuts with two on 1st Ave. S. and one on S. 3480 Street. The site plan shows four driveways with the southernmost and easternmost that were initially for emergency access are now proposed to enhance site access. The accesses on 1-st Ave. S. would be full access, the western driveway on S. 348th St. would be right turn in/out only and the eastern access on S. 348th St. is envisioned to be a 3/4 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 C paro�ea fnm�015 nz1. scum 3-8vn s ]n'.5ixstl u=�. rvw.ii<. Feee�a. �.var`P=e�9-��zo�saaamso-efiM�.�aus�si�a��sna-m��nzozin�� COLON COPY L1!�t JTE, Inc. LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -2- 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 2 shows the preliminary site plan provided to me prepared by Graves & Associates Architects dated March 19, 2021. The plan depicts 10 buildings (eight residential and two commercial buildings with one including the leasing/tenant amenity space), 450 parking stalls including garage parking and two accesses on each 1st 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 3481h 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. EXISTING ENVIRONMENT Project Site An aerial image of the project site obtained from King County IMap, augmented, is depicted below. C\-Pr jed Files�20k6.02'f SouN 346tM1 at tat Mwetl [lae FNWIncFetle�al Weyywgust20i0\6348th5veetMdetlUseSnenccesaiw-MarcM12o2� doc COLOR COPY ONLY LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -3- The site comprises five undeveloped parcels of land. Parcel #'s 9129400010, 9129400020, 9129400030, 9129400040 and 912940TR-A, Street System 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. Map III-5 from the City of Federal way Comprehensive Plan Chapter Three Transportation is depicted below: ('11yof Fndrr,31 Way Comprchorslva Han Functional Classification of Existing and Planned Streets and Highways pu. rsound � 1 Trangpurlallan Fierttenl South 348th Street Mixed Us.e- - :``.� Federal Way City Limits / Potentlai Annexation Area b /V Freeway Principal Arterial Minor Arterial r" Principal Collector ✓ Mlnor Collector I i A Federal Way MAP III-5 Both 1st Ave. S. and S. 348th Street are designated as Principal Arterial streets. 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 .' ; more information on this route and other available service is available at the Metro Transit website: httQ//metro.kingcounty. ov/. C\—Pm�a�l FAas\2016OZT - 5o�Rh 348th at Is[ M�.etl Vae - %N'H Inc-%etle.a� H'ayNvgcrt20�0\8348NStreetM��etlllseSrta>ccessTl0.Merch2021.tloc COLOR COPY ONLY LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -4- Below is a portion of Metro Transits System em Map September 2020 near the site: C_'iE£7t�3 €oll r i t reuerd►rvvdy South 348th Park, Street Mixed903 Use DART Safeway - Twin Lakes Pa .: St. Francis Hospital 03 DART � ' } 48 out S - 5 Hylek) ss Federal � A ` P Wetta€yet,, Wa' y U Kirinet Sunrise United Methodist csrr Church Neither Pierce nor Sound Transit provides service at the subject site. r Pierce Transit website: htLi)://www.oiercetransit.org� Sound Transit website: htLps://www.soundtransit.gfV Pedestrian Facilities (General) Curb, gutter and sidewalks exist on both sides of 1st Ave. S. and S. 348t" Street. Pedestrian activated signalized crossing exist on all legs of the 1SL Ave. S. at S. 348th Street intersection. Commercial Shoppin The proposed project is a mixed use including a pharmacy/drugstore. A WinCo grocery store is located about a 114 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.0 sda3.or website identified the students would attend the following schools: iFEDERAL WAY iPUB"LIC SCHOOLS e ��ect �..u\201°.021 So�i�3G9�M1 a� 1,: 11,K Vice FN'!l do' CL)LOR X)PIONLT LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -5- Enterprise Elementary School - 35101 5th Ave SW Illahee Middle School - 36001 1st Ave S y Todd Beamer High School - 35999 16th Ave S 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 1st 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, 2010 (to match prior analysis) was used to calculate the level of service at the study intersections. The following table depicts the LOS and corresponding average delay in seconds at signalized and stop control intersections: Intersection Type Signalized Level of Service �A B C D E 7F <10 >10 and <20 >20 and <35 >35 and <55 >55 and <80 >80 Stop Control <10 >10 and <15 >15 and <25 >25 and <35 L>35and <50 >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. JTE, Inc. LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -6- TP1.2 Develop a transportation system that achieves the following level of service (LOS) metrics: o Signalized Intersection outside of City Center will experience a L2 vehicle -to -capacity (v/c) ratio or lower o Unsigualized Intersection outside of City) Center will experience a 1.0 vehicle -to -capacity (v;c) ratio or lower o The City Center area will experience an average 1.1 vehicle -to -capacity (v/c) ratio or less. o Facility con-ipleteness as described in the following pedestrian, bicycling, axrI 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 201-8 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 usingthe WSDOT accident data portal available online at httr)s://rernotear)ps.wsdot.wa.j4ov/hip-hwaysafety/collision/data/portal/publicZ. 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. 3481h St. at 1st Ave. S. intersection in the four years inspected. These incidents correlate into an incident rate of 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 1st 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. 0\-Project Fle;\2016027- South 3o81h C 1s Mired Use-Fww-Ino-F 1.1 way\august2o2G\53a8uw5ueetMuetluxe5rteaccrsslw3n 11-21.— COLOR COPY ONLY LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -7- JTE, Inc. �e i ._�8th St_..: f South 348th Street Mixed Use 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 existing traffic 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. 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. C.\F'e,\2016.021 . .,1-1 nI, Mircec u.e Fh . r—ral Way'Arp.L2a20V348,h S,,.eN,.dUae5uh ,c TI Ma h2021 Soe COLOR COPY ONLY E, c. LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -8- 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. Try Generation The proposed S. 3481h 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 2. The trip generation for the project is calculated using trip rates from the Institute of Transportation Engineers (ITE) Trip Generation, loth Edition, for Mid -rise Apartment, Retail and a potential Coffee Shop or Fast Food Restaurant with Drive Up Service (ITE Land Use Codes 223, 826 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 JTE, Inc. 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. The retail commercial facilities include pass -by traffic. The ITE Trip Generation Handbook 3'd 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: G\—Prod Li I,,\2015627 Se Ift 3aa.M1 i. si I.ix�a u_� Faw lr�_ F��c�al Ways[ufius,2o2o\53ne�M15iree�Mixeauscgixen�zgcFlp.Ma�cM11011 ooc C Lei.,C)R COPY 01M.'i LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -9- Table 5-A: Computations Summary Total Entering Exiting All Person -Trips 276 12C 156 Internal Capture Petoentage 12Y 14% 11% External Vehicle-Tri ss 242 103 139 External Transit- Trl sd 0 0 0 External Nan-Motcrized Trips' 0 0 0 Table 5-P: Computations Summary Total Enterng Exiting All t'erson-Trips 240 132 105 Internal Capture Percentage 34°b 31 o 38% Externaikehicle-Triasr 158 91 u7 External Transit-Tri sp 0 0 0 Extenal Non -Motorized Trios' t) 1 0 0 Table i Internal Trip Capture Percentages by Land Use Land Use Entering Tripp Exiting Trips Office NiA NIA Retail 25% 21 Restaurant 15:/ 2% Cinema?Entertainment NIA NiA Residential 5x 22% Hotel N?A NSA Table 6-P: Internal Trip Capture Percentages by Land Use Land Use Entering Trips Exiting Trips dltice NxA W Retail 61% 54% Restaurant 30% 47% cinernAritertainment WA MA Residential 22% 2U% Hotel rVA 1', A The project is projected to generate 143 net new AM peak hour trips and 124 PM peak hour trips. These values are lower than the 163 AM and 171 PM peak hour trips projected with the prior site planning South 348th Street Mixed Use Site Access Traffic Report dated August 8, 2019 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 1st Ave. S at SW Campus Dr - S. 348th 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 6 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 7 shows the projected 2024 PM peak hour traffic volumes "with" the proposed project at the analysis intersection. The site generated PM peak hour traffic volumes shown on Figure 6 were added to the projected background traffic volumes shown on Figure 5 to obtain the Figure 7 volumes. ;Put.. <;r;;, Inc® LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -10- 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. Based on my operational analysis usingthe 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 15t Ave. S. at S. 3481h 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! I have discussed and provided the City initial technical data identifyingthat 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 15t 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. 34811 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. c\-Pm;ee[Re%\�O•E 0?]-soon aaa��s�let lJixe�Use n,..,nn'eOPsa�:•:ajlp�eo^1.02D`�3=91�`.Peetye:eJLl eS—cese I I,Z—?._.tloc JTE, Inc. LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -11- 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 Trip Generation data: EAST OFTCE - TRIAD GEWM-11 0N Tina Period I Soe M I TG RaW&Aer 9 Enter Try I EAt % I Exdt Trips I Trp TOW (T) "starC Offbe (ITE LUC 7 10,760 sf) - Size and use per King 00bunV Map data Weekday 1ru.76t- 9_74 sue= 1 5241 5011, 1 In2,41 1e4.8 AM peak hGur 10,760 1.16 864t 1,-3.7 14N I :L71 12.5D PM peak hour 10,76D 1.15 1.6:6 2.01 844,' 1 101. 41 12.4 where .x=unitsor 1,000sf;.T=Trips Note: Cue to rounding some values may not add sip 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 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. c�-a � sn��zo eozi-so�m s<em a;xrtu��_o i�:� rvw m, rece�aiwwwo��a:zozms3:ems��ae��n�.aausesnence�sflAMarcM120]]wc l,OUiR COPY 0N: LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -12- Site Access Sight Visibility Below are photographs taken at the primary 15t Ave. S. (north access), the S. 3481h Street (east access) driveways and the existing office driveway, respectively: C\-Pmjett Flles\201602i South 348th sl Ln Mivztl Ilse FWWI,, h2021dn COLOR COPY ONLY LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -13- C\-P,,j—F.I,,V01002i S—h340rh,t9 Mi WU, MW-Inc FeEeral Wad+h4ug�sr2020�5346N3irsalMrxetlN¢Sif¢4ocewlWW arcM12621.tloc COLOR COPY ONLY JTE, Inc. LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -14- Existing office driveway Ott" Looking- west from proposed east access driveway C�-Prated Fees�2o bo21-scum sasm at lsr M�.ea use-Frcx ine-Feeete3 wey�(wg�st10204,340th5treetMi�etlUse5ne.4ccessTl M—h262.— COWR COPY ONLY LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 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: 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%2OModels_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. Plod -FM Fes\201602*-sown 3aam ai in M.xea us..-FNwi,- F 011.IW.yVwg,92u20�349Awtt .iM..dw.s.t.AWMTla-M,,b2D2l.auc COLOR COPY ONLY LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -16- 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 duringthe Pm peak hour. The model results are depicted below: A a 0.6 C6 0 0.4 a- 0.2 0 Data X = 30 (mean arrival rate) iu = 240 (mean service rate) s = 1 (# servers) o ti o -0 o Number of Customers in System n F. 0 � ,J7 a 1 1� 10C€375 2 V) C113C718376 3 C11 C1i r i 71;13964 4 r, 0!.E.121 62' J 2 C. C, 29 E-F, 51 6 3 37HE-06 4 ?2: ::.-. E-.!-,7 L�E��. 8 6 21_"'91 E--0r 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. 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 03.18,2021. 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 per use would over estimate 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. 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 Independentfee calculations would be appropriate to account for the shared use activities on the site. c A�P, i— it-2019 D2' Some Saar, e,111 M,- Uoe riu.. n�'tdwa�'//ay'.P�;o-^�20'.0`."_9as��8�:eetlAi�e9 W a 5�trRcoe;oLa.Ma,.M12u21.tloc JTE, Inc. LANDMARK DEVELOPMENT GROUP Attn: Brett Jacobsen March 18, 2021 Page -17- SUMMARY, CONCLUSIONS AND RECOMMENDATIONS This 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 3,500 sf of leasing and tenant amenity space, 12,420 sf commercial/retail space and a 2,000 sf coffee shop or other restaurant use with drive up service. Access to the site is proposed via four driveways with two on 191 Ave. S. and two on S. 348th Street. The two existing curb cuts on 15t 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 for 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 traffic volume projections and calculatingthe 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. 3481h Street Mixed Use be allowed with the following traffic impact mitigation measures. r Construct project in accordance with applicable City requirements. Install site access driveways per applicable City requirements. y Appropriate vegetation and signing restrictions need to be applied at the site accesses to ensure appropriate sight lines. ➢ 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 C.A' Pigem FJrs' V 01G LN Sou J' 345th m lxi 11.xvti use . PNvr.,x . retici2l e'oy�,ie,�.:1920`8s48tnsvarMaecuresnraocess�lns4,r,n:nz1 eer, LANDMARK DEVELOPMENT CROUP Attn: Brett Jacobsen March 18, 2021 Page -18- JTE, Inc. If you have any questions you can contact me at 206.762.1978 or email me at jaketraffic@comcast.com. MJJ: mjj Very truly yours, Mark J. Jacobs, PE, PTOE, President JAKE FRAFFIC ENGINEERING, INC. G\-Project 91,,\2016027.5— 340In Mud Use-Fflw4. 1...-2o a.' COLOR COPY ONLY 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 AM Peak Overall E (57.9) E (70.0) E (73.9) NBLT D (48.3) D (48.2) D (48.5) 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 (144.8) S. 348th St. 50/95% queue 315'/384' 359'/463' 386'/508' WELT 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. 3481h St. Overall -- - A (0.6) at Site Access NBRT - - C (16.6) PM Peak Overall D (45.2) D (48.6) D (49.9) NBLT F (106.4) F (112.5) F (141.4) 1. 15t Ave. Sat 50/95% queue 77'/152' 84'/175' 93'/203' SW Campus Dr- NB Thru E (56.8) E (56.5) E (58.4) S. 348th St. 50/95% queue 103'/160' 113'/189' 123'/204' WBLT D (51.8) E (58.3) E (58.8) 50/95% queue 228'/285' 262'/331' 261'/329' Max V/C ratio 0.88 0.89 0.90 2. 15t Ave. Sat Overall - -- A (0.5) Site Access WB - -- B (12.9) 3. S. 348th St. Overall - - A (0.2) at Site Access WBLT - - B (10.2) NBRT - - B (11.9) V/C - volume 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 C'\-P,-F�Ias\201503i 5-h 3M15,h xl 1st Mi dUse -F W-I511e4xenT, M-a 202i Doc COLOR COPY ONLY } N N 00 m N Lo r~ CD -6 I r— DO ~ cmI (D N N m c I 00 O ItcI m cn (n m co IZT I I I I a (0 N N 3 m r i m a 00 O N m N (D j o I r- 00 W I N I p I -t Lo I H t i N c-i Q` O OO 00 O N m m r r� Q KT 00 O m O -i (D rl m c~-I I I O 0 x LU o 0 O 0 0 0 a 0 0 o o Co o N N O N p `� 0�t N Lo v N ti V (D I I I I I C LLJ — N w r I N rl O co O 00 O Vrm-I cr-I cm -I m L s � I I I W O C O O O O > C LO N 6l ci In O N I N O I . I m I I I - C W — Q z w Q O . Co . m c9 LO -i r~ I- Q O z a *' O LO o 0 as m O m O 00 c9 rl rl N � 0 LO o m ti 0 0o 0 I� LLJ Q U Q co I cI m cI �I .�I N N N N W W < LZLJ Ln 00 N d� CQ DO O Nlz� ti N (fl N M � m � m r� [n rn c4 CL UJ u LO (D 0� IS N N (V w� 0~0 Ll- LO O N H + O e-i ri rl F- X W N O N LLJ W U O W Co W o o c o 0 0 o c p N o 0 0 0 Q u) U *' O d O ci O W N W 0 0 0 0 I I F- = Q w 10 N m Ln m m In Ktf 7 LO ct m LO 0 W 00 rn I— (1j muj V 00 LO IZI- ti N ti e l Orl 00 NQ )I Lm.f N N c-1 � I'- N Q ? Om NpC w N W 00ti N .L i r-i C � ` N ORT U _ N \Oo0 0 OOaOaN o 0 O O O (D rl O O N 00 N cn O rI O O I c ci LO N (D �t LO (0 dt LO Q LO LO LO LO W N p N---- v= N (D C.) O N O N LO c 00 LY F m Ly 6) m +�+ r I ti I I I Ln O O O (~ O m 3 rj r E 0 U a a a ��IZI- N N N N O a a a N a N N N (N J::J O O O O 1 I fn Q LLJ N N N N p N N N N o m U E7x) ro .. L @ O L @ O Q O L a (LS s n @ s s (6 CO tv O N D OQ- O.E �� ` U- Qf 0- UQ - ~ d Q Ul �i Q �i ¢ a H Q L Ll <n 11 (!1 Lo 0 O O -I O co Z3 I I X Mi 0 'x7 kA QI �7 ih _L ui �[ \ <__ U M OL CL i L J C �J L'6 Lo +9 C U W CL C m C E C I C C rp LLJ v ID eb 0 CL cc u m = cr C [[l x �} = LfJ r [ } C} Q T LLJ m E 0) E 'C d! N r � 0 T 0 0 i c r E {l r ikJ 0 u L _- ap C M U aVYCL N LL VT n '0 a 2 CL C 0 Z L) !A 4l c C G C d C Lt l LIJ LU d) um D i :.J In 0 0- QS x o� a'• Q a Md Oi u) dt ci i L LJ CL F- E C 9 D 4D -a + dl e _ a LL - _ C7 +' o 0� x 0 1 T r o C) o {y7 E ID .O 5."2 u r in a CL °' Go o �. a3 RS ~ � ui U1 T3 N L FD C C7 � Project: South 348th Street Mixed Use - Federal Way Location: Southeast corner 1st Ave. S at SW Campus Dr.-S. 3481h St. intersection _4 SVY'fe.'>4 - � SVL`z-1Ih: St r a1 n C;�rndic�a¢an}�xs, a c"mot Project Site �4 N yr. 44m .g fir` -.p - Ll 6 i� a SUS 5` _ Tacoma 66 F � t PVJ 9.1F k.- £ rh M m i o 7 E 0,1,1,n u 7 NORTH y� a tanYan RJ N yS 3mh SY Federal Way AljbA nm 3- G. _ c 3491h St n x S 352nd Sk clh' 9�Flh S. 'S 356th Sl r7 N 5 35E;h Sy .tl S� cP q Oth S 54.11 St 5.,64th 5'! '! SO 366V :St-� �I y S%8th Sig a 32'J1 51 hYc S 3T2nd 51 a iJttA i - L 51h E . ` Midan 1V y 91h St E t r? — y� eif�: H -y F Tyr - - - ' 19lh-51 C E m m i alh St 1 F 20lh St E :,-3'"= `- _ ! o st Ecl9mwood F• SOUTH 348TH STEET MIXED USE - FEDERAL WAY JTE: Inc. SITE ACCESS TRAFFIC REPORT- REVISED FIGURE 1 Reprint in Color Only VICINITY MAP Project: South 348th Street Mixed Use - Federal Way Location: Southeast corner 1st Ave. S at SW Campus Dr.-S. 348th St. intersection NORTH .1 ___ 1 Note: Are 8.5 x 11" copy of the Site Plan is included with this report SOUTH 348TH STEET MIXED USE - FEDERAL WAY SITE ACCESS TRAFFIC REPORT - REVISED FIGURE 2 Reprint in Color Only PRELIMINARY SITE PLAN WON WA `AVM.. IV'd3(13J — - ------------ - -- ------ - - co sn- a i xi vi AVIM lv�jlaq-� LU F- U) H Lnos A(II AV IRS� I F ySx"' b �wlnCo Py �Y'w r' ®� S.Wireet- a. a Project 1st Avenue S. at S. 348th Street FIGURE 3 Reprint in Color Only NORTH -------------------- LEGEND 1 Approach Lane & Direction +' Stop Sign Traffic Signal Analysis I/S # # of Travel X-L's Lanes Posted Speed XXMPH Limit Image obtained from King County IMap SOUTH 348TH STREET MIXED USE SITE ACCESS TRAFFIC REPORT - REVISED EXISTING STREET LANES AND TRAFFIC CONTROL WinCo Foods Zp� tom_ lf ^� >- -o w El T CD 6 1 NORTH -------------- LEGEND f Peak Hour Traffic' Volume and Direction 0 Stop Sign A =- Traffic Signal Analysis I/S # m s # of Travel X L's Lanes e -peed Posted S 4 XXMPH Lim it t Image obtained from _ R King County IM ap m 145 N N 131 399 *� 1,086 76 jej je 430 �� 943 612 ' `� 100 71 a' n a 104 � r- Ln cc M N f0 f0 AM Peak Wednesday 06.06.2018 0700-0800 PM Peak Tuesday 06.05.2018 1630.1730 1st Ave. S at SW Campus Dr.-S. 348th Street 1TE, Inc. SOUTH 348TH STREET MIXED USE FIGURE 4 SITE ACCESS TRAFFIC REPORT - REVISED Reprint in Color Only EXISTING PEAK HOUR TRAFFIC VOLUMES WinCoa« _ Foods ., r. SR 34 th Street S-L ; 35, MPH ;. a. Ln ' 1: A Ln t 1&S 150 B5 �`1,225 i 4885 1,060 I 690 o o 115 7i Ln eq a 115 71 F F � N � AM Peak 1st Ave. S at SW Campus Dr.-S. 348th Street PM Peak NORTH -------------------- LEGEND Peak Hour Traffic Volume and Direction 0 Stop Sign Traffic Signal Analysis I/S # # of Travel X-L's Lanes Posted Speed XXMPH Limit Image obtained from r King County IMap SOUTH 348TH STREET MIXED USE FIGURE 5 SITE ACCESS TRAFFIC REPORT - REVISED PROJECTED 2024 PEAK HOUR TRAFFIC VOLUMES Reprint in Color only WITHOUT THE PROJECT I? NORTH -------------------- LEGEND Peak Hour Traffic �1 Volume and Direction a Stop Sign Traffic Signal I t s Analysis I/S # Image obtained from King County Map -- 13 , go go 2 Ti IN 4— (-8) '� 36 (111) ` 22 (5)'� (-10 19 (1 Ile je We 2 �t ! �# / 1 (-28) I 3 ; a \,17 (25) Go 00 LV 1st Avenue S. at S. 348th Street 1st Avenue S. at Site Access S. 348th Street at Site Access S ITE GENERATED AM PEAK "OUR TRIPS Total Intemal -shared Driveway (Pass -By) New Err 1-20 17 104 ( 54 Exit 156 17 139 (5Q 89 Total 276 1 341 2 (ICQI 143 Nc-te: P,cundinge:an re--,ultin minor tripdiffetential JT, Inc. SOUTH 348TH STREET MIXED USE SITE ACCESS TRAFFIC REPORT - REVISED FIGURE B AM SITE GENERATED AM PEAK HOUR TRAFFIC VOLUMES Reprint in coror only AND DISTRIBUTION i v C 4. lea 0. 3%a '` ar 1`(1) °�N F (-5) 20 (9 i (-2) 1 9 (5) 3 �`j to 4 7i 1st Avenue S. at 1st Avenue S. at S. 348th Street Site Access NORTH ------------------- LEGEND Peak Hour Traffic —0 Volume and Direction Stop Sign Y Traffic Signal i f 'y ,3 x] Analysis (/S # i Image obtained from King County [Map (-a) 1 25 (a) 1' 14 (3) % i S. 348th Street at Site Access SITE C&IERATED PM PEAK HOUR TRIPS Total Intemal shared Dnvewar (Pass�RY) New Enter 131 41 89 (1) 72 Exit 109 42 67 (16) 51 Total 1 2401 831 1.57 (33)1 124 NC-te:. Rounding r:an rasultin minurtripcliiarential T, fir` SOUTH 348TH STREET MIXED USE SITE ACCESS TRAFFIC REPORT - REVISED FIGURE 6 PM SITE GENERATED PM PEAK HOUR TRAFFIC VOLUMES Reprint in Color Only AND DISTRIBUTION J �I -a •70P NORTH -------------------- LEGEND ,ree Peak Hour Traffic Volume and Direction Stop Sign Traffic Signal X Analysis I/S # Image obtained from King County IMap [I A] FA -AM _ B-AM j -- CD p 163 / ei ei 437 1 M 53 / 685 $5 _ 27 - 29 100 = ♦ + F 1,062 =► �� 1 1,410 116 ti U) t- Ln Rr \ 32 N h n to 1st Avenue S. at S. 348th Street C-A M 4 I� ♦ 713 7 \1,462 1st Avenue S. at Site Access S. 348th Street at Site Access S. 348th Street at Office Building Access JT �� SOUTH 348TH STREET MIXED USE SITE ACCESS TRAFFIC REPORT - REVISED FIGURE 7 AM PROJECTED 2024 AM PEAK HOUR TRAFFIC VOLUMES Reprint in Color Only WITH THE PROJECT L n n 149 r ,I, 1483 1` 24 r 7LJL140 3 �N I �9 m� N � N 1st Avenue S. at 1st Avenue S. at S. 348th Street Site Access / m Rt N 1 / 1,879 1 I' 943 —0- NORTH -------------------- LEGEND Peak Hour Traffic Volume and Direction Stop Sign Traffic Signal Analysis I/S # Image obtained from King County IMap 1,852 33 y I 922 � \ 17 ]t N S. 348th Street at Site Access S. 348th Street at Office Building Access SOUTH 348TH STREET MIXED USE SITE ACCESS TRAFFIC REPORT - REVISED FIGURE 7 PM PROJECTED 2024 PM PEAK HOUR TRAFFIC VOLUMES Reprint in Color Only WITH THE PROJECT m U) Lu LU z U) J LLI z LLI 0 N LU LLI LLI z z LL U) LU U) w w U) 04 0 U) LIJ z 1�- p w w LL, LL,