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Home My WebLink AboutCOM 0861.000 2008-2010William P. Kenoi Mayor William T. Takaba Managing Director JULY 9, 2010 C iii f r of Pafilail DEPARTMENT OF PUBLIC WORKS Aupuni Center 101 Pauahi Street, Suite 7 • Hilo, Hawaii 96720 -4224 (808) 961 -8321 • Fax (808) 961 -8630 www.co.hawaii.hi us HONORABLE CHAIRMAN J YOSHIMOTO AND MEMBERS OF THE HAWAI'I COUNTY COUNCIL HAWAI'I COUNTY COUNCIL HILO HI 96720 SUBJECT:TRAFFIC CODE AMENDMENT PUAINAKO STREET SPEED LIMIT We request the Hawai'i County Code, Chapter 24, Article 10, Division 1 (Speed Limits), Section 24 -257, Schedule 5 (35 mile per hour limit), paragraph (c) South Hilo be amended by revising existing item: (27) Puainako Street Extension, WESTBOUND LANE, FROM A POINT FOUR HUNDRED FIFTY FEET WEST OF KAUMANA DRIVE TO ITS WESTERN TERMINUS AND EASTBOUND LANE, FROM A POINT 3.57 MILES EAST OF WILDER ROAD TO KOMOHANA STREET e ' . - _ _ - . - _ e . -feet east <.Z‘k■ - 'e -e - - County' of Hawai'i is an Equal Opportunity Provider and Employer. 4 - ) Warren H. W. Lee Un ector We request the Hawai'i County Code, Chapter 24. Article 10, Division 1 (Speed Limits). Section 24 -259, Schedule 7 (40 mile per hour limit), paragraph (c) South Hilo be amended by adding new item and renumbering as required: PUAINAKO STREET, WESTBOUND LANE, FROM A POINT 3.30 MILES WEST OF KOMOHANA STREET TO A POINT FOUR HUNDRED FIFTY FEET WEST OF KAUMANA DRIVE AND EASTBOUND LANE FROM ITS WESTERN TERMINUS TO A POINT 0.46 MILES EAST OF WILDER ROAD. COMM. N. ? .( 4° Rsf. To l 2L =f. Du :a JUN 0 7 2010 We request the Hawai'i County Code, Chapter 24, Article 10, Division 1 (Speed Limits), Section 24 -260, Schedule 8 (45 mile per hour limit), paragraph (c) South Hilo be amended by revising existing item: (3) Puainako Street Extcnsion, EASTBOUND LANE, from A POINT 3.44 MILES EAST OF WILDER ROAD TO A POINT SEVEN HUNDRED FEET IN THE EASTERLY DIRECTION Komohana Street to a point five hundred eighty four fcet ast of Wilder Road. We request the Hawai'i County Code, Chapter 24, Article 10, Division 1 (Speed Limits), Section 24 -263, Schedule 11 (55 mile per hour limit), paragraph (c) South Hilo be amended by adding new item: Puainako Street Speed Limit Code Amendments cont'd PUAINAKO STREET, WESTBOUND LANE, FROM KOMOHANA STREET TO A POINT 3.30 MILES IN THE WESTERLY DIRECTION AND EASTBOUND LANE, FROM A POINT 0.46 MILES EAST OF WILDER ROAD TO A POINT 2.98 MILES IN THE EASTERLY DIRECTION. In an effort to post speed limits more appropriate for the existing conditions along the aforementioned areas of Puainako Street, the Traffic Division conducted an engineering study and determined that the speed limits would be appropriate as specified. The engineering study included the following: • A speed study to determine the safe speed for the subject road; • A horizontal curve check using a ball -bank indicator to determine the safe speed around the horizontal curves; • A plan review of the horizontal and vertical curve dimensions to determine what design speeds and stopping sight distances are appropriate; and A check of the intersection sight distances to determine what design speeds are applicable to the existing conditions. A location map is attached for your reference. � m 4inatt--- Warren H.W. Lee Director of Public Works RLT /ATT cc: TRF Public Works Committee Chair (w /attach) Chief of Police APPROVED County of Hawai'i is an Equal Opportunity Provider and Employer. William - Kenoi Mayor County of Hawai' i Department of Public Works - Traffic Division April 7, 2010 TO: FILE (IR 08 -115) FROM: Vince Kasarskis SUBJECT: PUAINAKO STREET EXTENSION SPEED LIMIT RECOMMENDATIONS The posted speed limits for the Puainako Street Extension from Komohana Street to Country Club Road were evaluated. • Speed studies were conducted that indicated that the 85 percentile speeds were well above the posted speed limits (62 MPH in the posted 35 MPH area and 64 MPH in the posted 45 MPH area). • The curves along the entire length were tested at proposed speed limits with a ball bank meter. • Each horizontal curve was reviewed and the design speeds exceed the proposed speed limits by a minimum of 5 MPH for each horizontal curve. • Each vertical curve was reviewed. At three (3) vertical curves, the proposed speed limit will match the design speed. • The intersection sight distance at Wilder Road was field measured. This field measurement limits the speed limit of Puainako Street at the intersection to a posted speed of 40 MPH. Intersection sight distance for a vehicle facing Hamakua and executing a left turn onto Puainako Extension (heading toward Waimea) could be increased to allow a posted speed limit of 45 MPH on Puainako Street Extension by raising the Hamakua bound side by approximately 0.35 feet. Raising a portion of the intersection would require adjusting the grade of the entire intersection to allow proper drainage off the major road, Puainako Street. • There will be a realignment project for Saddle Road between milepost 6 to milepost 1 1 . The design speed and posted speed of this realigned section may support justify adjusting the grade of the Wilder Road intersection to minimize the number of speed changes. For existing conditions, the following recommendations are made: 1. Raise the posted speed limit from 35 MPH to 40 MPH from STA 2 +00 +/- to STA 77 -+ 75 + /- (approximately 1.5 miles). 2. Raise the posted speed limit from 45 MPH to 55 MPI I from STA 77- + -75 +/- to Komohana Street (STA 251 +10 + / -) (approximately 3.3 miles). The speed limit heading makai (toward Hilo) will be reduced to 35 MPH approaching the Komohana Street traffic signal. The speed limit evaluation of Puainako Street Extension was coordinated with State Traffic Engineer, Alan Takeshita, who had no exceptions. County of Hawaii is an Equal Opportunity Provider and Employer. SPEED LIMIT 35 `— 40 MPH SPEED LIMn 40 55 MPH SPEED LW, 55 I; / ,; 0 I L � \� , I � � � 1 3.57 MI. E. OF \ S. WILDER RD. \ \ 3.44 MI. E. OF \." z 1- S. WILDER RD. ,-- - (--Y 0 , _. - � I I ' I Q (,,,,___ 45 MPH '--c/ f ► ' 1 3.30 MI. W. OF —L -- -- 1 KOMOHANA ST./ 0.46 MI. E. OF S. WILDER RD. 35 MPH __ o+ ct CL La 450' W. OF KAUMANA DR. o ° 40 MPH I r 55 MPH SP ED LIMIT 0 SPEED LIMIT 55 SPEED LIMIT 45 SPEED U ff 35 SPEED LIMIT LAYOUT SPEED LIMIT LAYOUT PUAINAKO STREET, HILO, HI TRAFFIC DIVISION, Department of Public Works PUAINAKO STREET ` i� COUNTY OF HAWA IR No: 08 -115 WO N o: N/A Date 6 /29/10 Scale: NTS Drawn by An Page 1 of 1