HomeMy WebLinkAbout1416 N 30th Street Comparative Trip Generation Analysis - FINAL 2-1-18 TENW
Transportation Engineering NorthWest
Transportation Planning | Design | Traffic Impact & Operations
PO Box 65254, Seattle, WA 98155 | Office (206) 361-7333
MEMORANDUM
DATE: February 1, 2018
TO: Norman McCue, CPM, Managing Broker, McCue & Associates, Inc.
FROM: Michael Read, PE, Principal, TENW
SUBJECT: 1416 N 30th Street ă Comparative Trip Generation Analysis of Alternative Buildout
TENW Project No. 3582
This memorandum summarizes the results of a comparative trip generation analysis associated with
a proposed redevelopment at 1416 N 30th Street at the northwest quadrant of the I-405 SB Ramp
and N 30th Street intersection in the Kennydale neighborhood of Renton, WA. The redevelopment
area comprises two parcels: a northern parcel with an existing 8-unit apartment building that is
currently zoned Residential-6 (R-6), and a commercial parcel fronting N 30th Street with the existing
gas station and a 1,650 square-foot convenience zoned as Commercial Neighborhood (CN).
Upon completion, the revised „Proposed Redevelopment‰ project would replace an existing 1,640
square-foot convenience market with a 4,500 ground floor convenience retail building and 4 new
apartment units above on a second story and additional on-site parking.
Project Description
The Proposed Redevelopment project is located1416 N 30th Street in Renton, WA. A ground-floor
conceptual site plan is provided as Attachment A. As noted above, an existing 1,650 square-foot
convenience market would be removed and a new 4,500 ground floor convenience retail building
with 4 new apartment units on a second story would be constructed as part of the Proposed
Redevelopment. Additional on-site parking would also be constructed and the existing fuel station
and 8-unit apartment building would remain.
The City of Renton Planning Commission is considering a request for updating the Comprehensive
Plan with an amendment to change the parcel where the existing 8-unit apartment structure from the
land use designation Residential Medium Density (RMD) to Residential High Density (RHD) and a
zoning change from R-6 to CN. This comparative trip generation analysis of the Proposed
Redevelopment as well as conversion of the entire property to a commercial retail building only is
being submitted as supplemental information to the property ownerÊs application.
Attachment B provides a site plan of this Alternative Redevelopment, which was the originally
proposed project to remove the existing convenience market and the 8-unit apartment building and
construct a new 12,000 square-foot commercial building. Under this scenario, the existing fuel
station would remain.
Comparative Trip Generation Analysis 1416 N 30th Street
TENW February 1, 2018
Page 2
Comparative Trip Generation Analysis
Published trip rate equations compiled by the Institute of Transportation Engineers (ITE) Trip
Generation, 10th Edition, 2017, were used to estimate daily, a.m. and p.m. peak hour traffic that
would be generated by the proposed redevelopment assuming new Apartments (ITE Land Use
Code 220) and Convenience Retail (ITE Land Use Code 851). The existing 1,650 square-foot
convenience market would be removed and would be re-established within a larger ground floor
retail space. As such, a net increase in convenience retail space within the proposed new
commercial retail space was applied to estimate new vehicle trip generation. This methodology
was applied under either redevelopment scenario.
As shown in Table 1, when considering removal of existing land uses, an estimated net increase of
approximately 2,202 daily, 89 new a.m. peak hour (42 entering and 47 exiting), and 71 new
p.m. peak hour vehicular trips (34 entering and 37 exiting) would be generated at full build-out of
the Proposed Redevelopment. Under the Alternative Redevelopment, an estimated net increase of
approximately 332 daily, 17 new a.m. peak hour (11 entering and 6 exiting), and 67 new p.m.
peak hour vehicular trips (34 entering and 33 exiting) would be generated at full build-out.
Table 1: 1416 N 30th Street Mixed Use Generation Summary
Time Period In Out Total
Proposed Redevelopment - Net Increase in Trip Generation
(4 New Apartments and 2,850 SF in New Convenience Retail)
Weekday AM Peak Hour 42 47 89
Weekday PM Peak Hour 34 37 71
Weekday Daily 1,101 1,101 2,202
Alternative Redevelopment - Net Increase in Trip Generation
(10,350 SF in New Retail – Removal of All Apartments)
Weekday AM Peak Hour 11 6 17
Weekday PM Peak Hour 34 33 67
Weekday Daily 166 166 332
Source: Trip Generation Manual, 10th Edition, ITE, 2017.
A detailed summary of trip generation calculations is provided in Attachment C.
Conclusions
The Proposed Redevelopment at 1416 N 30th Street was evaluated for increased traffic demands.
A net increase of approximately 2,202 new daily, 89 new a.m. peak hour trips, and 71 new
p.m. peak hour vehicular trips are estimated at full buildout of the Proposed Redevelopment. Given
the overall size of the convenience market is nearly double a typical size, a sensitivity analysis that
assumes buildout of 3,000 square-feet of convenience retail would reduce net PM peak hour trip
generation to only 35 new p.m. peak hour trips.
Under the Alternative Redevelopment proposal, the net increase in traffic demands would be nearly
equivalent to the currently Proposed Redevelopment during the afternoon peak hour, but
significantly lower during the a.m. peak hour and on a daily basis.
If you have any questions, please call me at (206) 361-7333 x 101 or mikeread@tenw.com.
Attachment A
Proposed Redevelopment Site Plan
Attachment B
Alternative Redevelopment Site Plan
Commercial Uses only
Attachment C
Comparative Trip Generation Detailed Summary
ITE Trip Generation, 10th Edition, 20171416 N 30th StreetLUDailyProposedX Code Enter Exit Trips Enter Exit Trips Trips Daily Rate AM Rate PM RateExisting UsesApartments (Low‐Rise Units)8 222 1 3 4 3 2 4 59 7.32 0.46 0.56Gas Station with Convenience Market (Fuel Positions)8 945 505010056561121643205.36 12.47 13.9951 53 103 59 58 116 1701Scenario 1 ‐ Proposed UsesConvenience Retail (Additional Floor Area)2,850 851 86 92 178 67 72 140 2173 762.28 62.54 49.11Apartments (Low‐Rise Units)12 222 1 4 6 4 2 7 88 7.32 0.46 0.56Gas Station with Convenience Market (Fuel Positions)8 945 505010056561121643205.36 12.47 13.99137 146 284 128 131 259 3903‐44‐47‐91‐34‐37‐71 Pass‐By Reductions for Retail (Convenience 51%)42 47 89 34 36 71 2202 Net Increase with Proposed RedevelopmentScenario 2 ‐ Zoning AnalysisRetail Shopping10,350 820 5 5 10 19 20 39 391 37.75 0.943.81Apartments (Low‐Rise Units)0 222 0 0 0 0 0 0 0 7.32 0.460.56Gas Station with Convenience Market (Fuel Positions)8 945 505010056561121643205.36 12.47 13.9955 54 109 75 76 151 2034‐2‐2‐3‐6‐7‐13 Pass‐By Reductions for Retail (Shopping 34%)11 6 17 34 33 67 332 Net Increase with Proposed RedevelopmentScenario 1 ‐ Proposed Uses (Reduced Buildout to 3,000 SF)Convenience Retail (Additional Floor Area)1,350 851 41 43 84 32 34 66 1029 762.28 62.54 49.11Apartments (Low‐Rise Units)12 222 1 4 6 4 2 7 88 7.32 0.46 0.56Gas Station with Convenience Market (Fuel Positions)8 945 505010056561121643205.36 12.47 13.9992 98 190 92 93 185 2760‐21‐22‐43‐16‐17‐34 Pass‐By Reductions for Retail (Convenience 51%)20 23 43 17 18 35 1058 Net Increase with Proposed RedevelopmentAM Peak PM Peak1416 N 30th Street Trip Generation Analysis.xls