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Home My WebLink AboutRS_Traffic_Scoping_Memo_Logan Six_220330_v1.pdf 2813 Rockefeller Avenue  Suite B  Everett, WA 98201 Tel: 425-339-8266  Fax: 425-258-2922  E-mail: info@gibsontraffic.com SCOPING MEMORANDUM To: Ambili Sukesan From: Matthew Palmer Subject: Trip Generation and Distribution Scoping Memo Date: October 28, 2021 Project: Logan 6, GTC #21-281 Gibson Traffic Consultants, Inc. (GTC) has been retained to provide a trip generation and distribution scoping memo for the proposed Logan 6 development located on the east side of Logan Avenue N, between N 4th Street and N 3rd Street in the City of Renton. The development is proposed to consist of 100 multifamily mid-rise units and 10,248 square feet (SF) of commercial space. At this time, the use of the commercial component is not determined; however, it is anticipated that it will be something similar to general retail or general office uses. The site is currently undeveloped. A site vicinity map is included in Figure 1. Matthew Palmer, responsible for this memorandum, is a licensed professional engineer (Civil) in the State of Washington and member of the Washington State section of ITE. 1. TRIP GENERATION Trip generation calculations for the Logan 6 development have been performed utilizing data published in the Institute of Transportation Engineers (ITE) Trip Generation Manual, 10th Edition + Supplement (2020). The average trip generation rates for the following ITE Land Use Codes (LUC) have been utilized in the trip generation calculations:  LUC 221, Multifamily Housing (Mid-Rise) – 100 apartments units  LUC 820, Shopping Center – 10,248 SF of retail space The commercial component has been conservatively analyzed in this report as a shopping center (retail) use as it has a higher trip generation than typical office uses. It is also important to note that although ITE Land Use Code 820 is called shopping center, does not mean that the commercial use will meet the City of Renton’s definition for shopping centers. ITE LUC 820, Shopping Center was utilized as ITE does not have a general retail land use code any longer. ITE also publishes a pass-by rate for ITE Land Use Code 820 to account for existing trips along the roadway using the site. This pass-by rate, 34%, has been applied to the daily and peak-hour trip generation calculations. The trip generation calculations of the Logan 6 development are summarized in Table 1. TRAFFIC IMPACT STUDY CITY OF RENTON G IBSON T RAFFIC C ONSULTANTS GTC #21-281 LOGAN 6 PARK AVE NN 8TH ST GARDEN AVE NLOGAN AVE NN 4TH ST N 3RD ST N E 3 R D S TSUNSET BLVD NENE S U NS E T BL V D RAINIER AVE NAIRPORT WAY S 3RD ST S 2ND ST MAIN AVE SMAPLE VALLEY HWYBRONSONWAY SSITE RENTON AVE S 405405 900900 900900 167167 169169169 167 900 900 405 LEGEND SITE VICINITY MAPDEVELOPMENT SITE FIGURE 1 Logan 6 Trip Generation and Distribution Scoping Memo Gibson Traffic Consultants, Inc. October 2021 info@gibsontraffic.com 3 GTC #21-281 Table 1: Trip Generation Summary Land Use Units/Size Average Daily Trips AM Peak-Hour Trips PM Peak-Hour Trips Inbound Outbound Total Inbound Outbound Total ITE LUC 221, Multifamily Mid- Rise) 100 Units 544 9 27 36 27 17 44 ITE LUC 820, Shopping Center 10,248 SF 387 6 4 10 18 21 39 Pass-By -132 -2 -1 -3 -6 -7 -13 TOTAL NEW TRIPS 799 13 30 43 39 31 70 2. TRIP DISTRIBUTION The Logan 6 development is proposed to have one access onto N 4th Street and one access onto N 3rd Street. The distribution of trips is based on existing travel patterns and surrounding uses. It is anticipated that 25% of the trips generated by the development will travel to and from the north along I-405. An estimated 5% of the trips generated by the development will travel to and from the east along NE 3rd Street. Approximately 20% of the trips generated by the development will travel to and from the south, five percent along SR-167 and fifteen percent along I-405. An anticipated 25% of the trips generated by the development will travel to and from the west, fifteen percent along Renton Avenue S and ten percent along SR-900. The remaining 25% of the development’s trips will travel to and from local destinations. Detailed trip distributions for the AM peak-hour and PM peak-hour are shown in Figure 2 and Figure 3, respectively. TRAFFIC IMPACT STUDY CITY OF RENTON G IBSON T RAFFIC C ONSULTANTS GTC #21-281 LOGAN 6 PARK AVE NN 8TH ST GARDEN AVE NLOGAN AVE NN 4TH ST N 3RD ST N E 3 R D S TSUNSET BLVD NENE S U NS E T BL V D RAINIER AVE NAIRPORT WAY S 3RD ST S 2ND ST MAIN AVE SMAPLE VALLEY HWYBRONSONWAY SSITE RENTON AVE S 405405 900900 900900 167167 169169169 167 900 900 405 *NOTE: RETURN TRIPS WILL UTILIZE N 4TH ST511 280 35 LOCAL LOCAL LOCAL 10 3 801 15 21204 35* 102794 2 0 4 0 5 15 2 1194 1 3 8 0 10 1 2 405 3 2520 07 2 1 405 2 4 12015 10 3801 3 2 8010 9 424030 405 900 900 167 169 DEVELOPMENT TRIP DISTRIBUTION AM PEAK-HOUR FIGURE 2 TRIP DISTRIBUTION % DAILY TRAFFIC AM PEAK HOUR TRIPSAM PEAK AWDT XX LEGEND TRAFFIC IMPACT STUDY CITY OF RENTON G IBSON T RAFFIC C ONSULTANTS GTC #21-281 LOGAN 6 PARK AVE NN 8TH ST GARDEN AVE NLOGAN AVE NN 4TH ST N 3RD ST N E 3 R D S TSUNSET BLVD NENE S U NS E T BL V D RAINIER AVE NAIRPORT WAY S 3RD ST S 2ND ST MAIN AVE SMAPLE VALLEY HWYBRONSONWAY SSITE RENTON AVE S 405405 900900 900900 167167 169169169 167 900 900 405 LEGEND XX AWDT PEAKPM PM PEAK HOUR TRIPS DAILY TRAFFIC TRIP DISTRIBUTION % FIGURE 3 DEVELOPMENT TRIP DISTRIBUTION PM PEAK-HOUR 30 24012 9 10 804 3 480 310 15 1205 6 54 02 1 8 20025 10 5 402 2 10 8 0 3 4 5 1195 15 5 4 0 2 11327911 35* 5 120615 4 803 10 LOCAL LOCAL LOCAL 35 280 11 14 *NOTE: RETURN TRIPS WILL UTILIZE N 4TH ST Logan 6GTC #21-281Trip Generation for: Weekday(a.k.a.): Average Weekday Daily Trips (AWDT)NET EXTERNAL TRIPS BY TYPEIN BOTH DIRECTIONS DIRECTIONAL ASSIGNMENTSGross TripsInternalCrossoverTOTAL PASS-BY DIVERTED LINK NEW PASS-BYDIVERTED LINKNEWLAND USES VARIABLEITE LU codeTripRate%IN%OUTIn+Out(Total)% ofGrossTripsTripsIn+Out(Total)In+Out(Total)% ofExt.TripsIn+Out(Total)% ofExt.TripsIn+Out(Total)In+Out(Total)In Out In Out In OutMultifamily (Mid-Rise) 100 units 221 5.44 50%50% 5440%0 5440%00%0 544 0 0 0 0 272 272Shopping Center 10.248 KSF 820 37.75 50%50% 3870%0 38734%1320%0 255 66 66 0 0 128 127Total931 0 931 132 0 799 66 66 0 0 400 399 A - 1 Logan 6GTC #21-281Trip Generation for: Weekday, Peak Hour of Adjacent Street Traffic, One Hour between 7 and 9 AM(a.k.a.): Weekday AM Peak HourNET EXTERNAL TRIPS BY TYPEIN BOTH DIRECTIONS DIRECTIONAL ASSIGNMENTSGross TripsInternalCrossoverTOTAL PASS-BY DIVERTED LINK NEW PASS-BYDIVERTED LINKNEWLAND USES VARIABLEITE LU codeTripRate%IN%OUTIn+Out(Total)% ofGrossTripsTripsIn+Out(Total)In+Out(Total)% ofExt.TripsIn+Out(Total)% ofExt.TripsIn+Out(Total)In+Out(Total)In Out In Out In OutMultifamily (Mid-Rise) 100 units 2210.36 26%74% 36 0% 0 36 0% 0 0% 0 36 0 0 0 0 9 27Shopping Center 10.248 KSF 8200.94 62%38% 10 0% 0 10 34% 3 0% 0 7 2 1 0 0 4 3Total46 0 46 3 0 43 2 1 0 0 13 30 A - 2 Logan 6GTC #21-281Trip Generation for: Weekday, Peak Hour of Adjacent Street Traffic, One Hour between 4 and 6 PM(a.k.a.): Weekday PM Peak HourNET EXTERNAL TRIPS BY TYPEIN BOTH DIRECTIONS DIRECTIONAL ASSIGNMENTSGross TripsInternalCrossoverTOTAL PASS-BY DIVERTED LINK NEW PASS-BYDIVERTED LINKNEWLAND USES VARIABLEITE LU codeTripRate%IN%OUTIn+Out(Total)% ofGrossTripsTripsIn+Out(Total)In+Out(Total)% ofExt.TripsIn+Out(Total)% ofExt.TripsIn+Out(Total)In+Out(Total)In Out In Out In OutMultifamily (Mid-Rise) 100 units 2210.44 61%39% 44 0% 0 44 0% 0 0% 0 44 0 0 0 0 27 17Shopping Center 10.248 KSF 8203.81 48%52% 39 0% 0 39 34% 13 0% 0 26 6 7 0 0 12 14Total83 0 83 13 0 70 6 7 0 0 39 31 A - 3