Traffic~~~ HEATH & ASSOCIATES, INC. Transportation and Civil Engineering
June 18, 2001 7" ~ ~~ 11/FD
JUG 1 1 2001
Mr. Bruce McKean ~
Helix Architecture ~~~ a"t"~e~nre
6021 12th Street East
Tacoma, WA 98424
Subject: Traffic Assessment - Yelm Recreation Facility
Dear Ms. Marten:
Per my discussion with Bruce McKean and information I have received from his
company Helix Architecture, I have performed a traffic assessment for the Yelm
Recreation Facility project.
The estimated trip generation for the project is found to be below threshold needed for a
full traffic review as the 13 trips expected for the PM peak hour of the project does not
meet the bottom threshold volumes of 20 PM peak hour trips. Nonetheless the city of
Yelm is requesting a trip generation review to discern project volumes.
Introduction
The addition is comprised of 3,400 square feet of warehousing to provide support area for
the existing food bank operation and an increase of 6,000 square feet to the recreation
center. Both operations exist on the site and the increase in facility size will provide
more complete utilization of the facilities.
The trip generation presented for both uses represent the traffic expected during the
busiest hour of the day for the local street system. The recreation facilities might
experience higher traffic at other times, primarily weekends and later evenings, when
roadway system travel is lower than the PM peak hour.
Trip Generation
Trip generation is used to determine the magnitude of project impacts on the surrounding
street system. Data for this assessment was taken from the Institute of Transportation
Engineers publication, Trip Generation, Sixth Edition. The land use designations used
for this project are Warehousing (LUC 150) for the Food Bank support area and
Recreation Community Center (LUC 495).
2214 Tacoma Road • Puyallup, WA 98371 • (253) 770-1401 • Fax (253) 770-1473
TABLE 1
Project Trip Generation
3.4 K Warehousing
Time Period Volume
AWDT (Estimated) I7 vpd
AM Peak Inbound 1 vph
AM Peak Outbound 1 vph
AM Peak Total 2 vph
PM Peak Inbound 1 vph
PM Peak Outbound 1 vph
PM Peak Total ~ 2 vph
TABLE 2
Project Trip Generation
6.0 K Recreation Center
Time Period Volume
AWDT (Estimated) 137 vpd
AM Peak Inbound 5 vph
AM Peak Outbound 3 vph
AM Peak Total g ~,,ph
PM Peak Inbound 4 vph
PM Peak Outbound 7 vph
PM Peak Total 11 vph
Conclusion
The modest amount of traffic from the improvements to the Yelm Recreation Center and
Food Bank should not trigger any traffic improvements nor require any additional study.
The only issue is to ensure that the sight distance issues are not impaired by design or
landscaping which can easily be addressed at the site development stage.
Please call if further information is required.
Sincerely,
~~
Gregary B. Heath, P.E.
2
Summary of Trip Generation Calculation ~ ~~ ~`~~
For 3.4 Th.Gr.Sq.Ft. of Warehousing
May 04, 2001
Average Standard Adjustment Driveway
Rate Deviation Factor Volume
Avg. Weekday 2-Way Volume 4.96 4.05 1.00 17
7-9 AM Peak Hour Enter 0.37 0.00 1.00 1
7-9 AM Peak Hour Exit 0.08 0.00 1.00 0
7-9 AM Peak Hour Total 0.45 0.74 1.00 2
4-6 PM Peak Hour Enter 0.12 0.00 1.00 0
4-6 PM Peak Hour Exit 0.39 0.00 1.00 1
4-6 PM Peak Hour Total 0.51 0.83 1.00 - 2
AM Pk Hr, Generator, Enter 0.34 0.00 1.00 1
AM Pk Hr, Generator, Exit 0.23 0.00 1.00 i
AM Pk Hr, Generator, Total 0.57 0.84 1.00 2
PM Pk Hr, Generator, Enter 0.05 0.00 1.00 0
PM Pk Hr, Generator, Exit 0.56 0.00 1.00 2
PM Pk Hr, Generator, Total 0.61 0.85 1.00 2
Saturday 2-Way Volume 1.22 0.00 1.00 4
Saturday Peak Hour Enter 0.08 0.00 1.00 0
Saturday Peak Hour Exit 0.04 0.00 1.00 0
Saturday Peak Hour Total 0.12 0.00 1.00 0
Sunday 2-Way Volume 0.79 0.00 1.00 3
Sunday Peak Hour Enter 0.04 0.00 1.00 0
Sunday Peak Hour Exit 0.03 0.00 1.00 0
Sunday Peak Hour Total 0.07 0.00 1.00 0
Note: A zero indicates no data available.
Source: Institute of Transportation Engineers
Trip Generation, 6th Edition, 1997.
TRIP GENERATION BY MICROTRANS
Summary of Trip Generation Calculation
For 6 Th.Gr.Sq.Ft. of Recreation Community Center
May 04, 2001
~~~~~~
Average
Rate Standard
Deviation Adjustment
Factor Driveway
Volume
Avg. Weekday 2-Way Volume 22.88 0.00 1.00 137
7-9 AM Peak Hour Enter 0.87 0.00 1.00 5
7-9 AM Peak Hour Exit 0.45 0.00 1.00 3
7-9 AM Peak Hour Total 1.32 0.00 1.00 g
4-6 PM Peak Hour Enter 0.60 0.00 1.00 4
4-6 PM Peak Hour Exit 1.15 0.00 1.00 7
4-6 PM Peak Hour Total 1.75 1.44 1.00 - 11
AM Pk Hr, Generator, Enter 1.42 0.00 1.00 9
AM Pk Hr, Generator, Exit 1.26 0.00 1.00 g
AM Pk Hr, Generator, Total 2.68 0.00 1.00 16
PM Pk Hr, Generator, Enter 0.84 0.00 1.00 5
PM Pk Hr, Generator, Exit 1.42 0.00 1.00 9
PM Pk Hr, Generator, Total 2.26 0.00 1.00 14
Saturday 2-Way Volume 9.10 0.00 1.00 55
Saturday Peak Hour Enter 0.61 0.00 1.00 4
Saturday Peak Hour Exit 0.64 0.00 1.00 4
Saturday Peak Hour Total 1.25 0.00 1.00 g
Sunday 2-Way Volume 13.60 0.00 1.00 82
Sunday Peak Hour Enter 0.83 0.00 1.00 5
Sunday Peak Hour Exit 0.65 0.00 '1.00 4
Sunday Peak Hour Total 1.48 0.00 1.00 9
Note: A zero indicates no data available.
Source: Institute of Transportation Engineers
Trip Generation, 6th Edition, 1997.
TRIP GENERATION BY MICROTRANS