HomeMy WebLinkAboutCOM 0187.019 1998-2000October 27, 1999
Eric T. Maehara
Attorney at Law
Grosvenor Center, Makai Tower
733 Bishop Street, Suite 2530
Honolulu, Hawaii 96813
Re: Kahakai Development
PBQD Reference: 16291A
Dear Mr. Maehara:
Parsons Pacific Tower, Suite 3000
BrhrckerhoH 1001 Bishop Street
Honolulu, HI 96813
808-531-7094
Fax: 808-528-2368
RECENED y
="'County Council
Based on our telephone conversation yesterday, I have investigated the traffic implications
of increasing the size of the proposed Kahakai residential development from 98 single-
family dwelling units (sfdu) to 120 sfdu.
This analysis is based on the same assumptions used for our traffic analysis documented
in our letter report dated December 14, 1998 for the Kahakai Development. To summarize
the assumptions: the trip generation rates used are documented in the Institute of
Transportation Engineers publication entitled, Trip Generation, 6th edition, background
traffic volumes were forecast to Year 2000 conditions using a 2.5 percent annual growth
rate applied to Year 1994 traffic volumes counted by the State of Hawaii Department of
Transportation at Count Station 8-K (Kuakini/Hualalai), and the intersection analysis utilized
the unsignalized method documented in the 1994 Highway Capacity Manual.
Based on these assumptions, a revised Kahakai development containing 120 sfdu will be
able to be accommodated without changing the projected acceptable peak hour LOS at
the proposed access/Kuakini Highway intersection. It follows that the single access into
the Kahakai development will be sufficient to handle its projected traffic.
A major assumption implicit in these findings is the magnitude of future background traffic
volume on Kuakini Highway. Currently, we are growth -factoring the existing volumes
based on a count taken just south of Hualalai Road. This count, as we have stated in our
previous reports, is conservatively high. The count at the Kahakai driveway location would
be lower. However, the higher value does give us flexibility in establishing the buildout
year for Kahakai. For example, we assumed buildout in the Year 2000 based on the plan
proposed previously. It now appears that the Year 2000 will not be the year of buildout,
but because we're conservatively high in the projection of background traffic, we could
slide the buildout year forward without a problem.
Over a Century o/
Engineering Excellence
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Ref. To: Prow Covnl.t.
Ref. Date DEC 1 1999
Mr. Eric Maehara
October 27, 1999
Page 2
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11.11
I hope this evaluation addresses the questions you and Stanford have with regard to
development scenarios for the proposed Kahakai development. If you have any questions
or comments, please call.
Very truly yours,
PARSONS BRINCKERHOFF QUADE & DOUGLAS, INC.
V,7/ -Z— I `
Wayne Y. Yoshioka
Senior Supervising Transportation Engineer
cc: Stanford Carr Stanford S. Carr Development fax 537-1801
Over a Century o/
Engineering Excellence
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