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Home My WebLink AboutCOM 0223.000 2012-2014 William P.Kenoi % •ia k't' '�c+% Warren H.W.Lee Mayor .ear Director Wally Lau °F Brandon A.K.Gonzalez Managing Director Deputy Director Lnunfg f 714a i`i 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 March 15, 2013 HONORABLE CHAIRMAN J YOSHIMOTO :? AND MEMBERS OF THE HAWAII COUNTY COUNCIL HAWAII COUNTY COUNCIL HILO HI 96720 SUBJECT: TRAFFIC CODE AMENDMENT: SECTION 14-55 - REVISION OF TABLES We request the Hawai'i County Code, Chapter 14, Article 9 (Outdoor Lighting), Section 14-55 (Tables), be amended by revising as follows: Section 14-55. Tables TABLE 14-A Lamp Type Shielding Requirement Operation Restrictions Class I Low pressure sodium Fully shielded None Low pressure sodium Partially shielded Existing fixtures only. New installations as of October 2010 prohibited Others above 4,050 lumens Fully shielded Off from 11:00 p.m. to sunrise* Others below 4,050 lumens Fully shielded Off from 11:00 p.m. to sunrise* LED fixtures with less than 2% Fully shielded Off at 11:00 p.m. to sunrise* blue light content Class II Low pressure sodium 90 watts or less None Existing fixtures only New installations as of October 2010 prohibited Greater than 90 watts Partially shielded Existing fixtures only New installations as of October 2010 prohibited Low pressure sodium Fully shielded None LED fixtures with less than 2% Fully shielded Stvareetlightts-within 1,320 feet of blue light content and signalized intersections or traffic color compliant within 100 feet of marked croscwalka NONE < 2;,', \\ ��> Comm. No. -1 3 County of Hawai`i is an Equal Opportunity Provider and Employer. Ref.To' Ref. Date MAR 2 7 2013 Traffic Code Amendment Section 14-55 Page 2 Others above 4,050 lumens Prohibited Others below 4,050 lumens Prohibited Class III Low pressure sodium Fully shielded None Others above 4,050 lumens Prohibited Others below 4,050 lumens Fully shielded Off from 11:00 p.m. to sunrise* Neon None Off from 11:00 p.m. to sunrise* The intent of this amendment is to allow for the use of Class II LED fixtures within all private and public right-of-ways. A Powerpoint Presentation is attached for your reference and we are requesting a presentation before Council as well. APPROVED Warren H.W. Lee William P. Kenoi Director of Public Works Mayor RLT/ATT cc: TRF Public Works Committee Chair (w/attach) Chief of Police County of Hawai'i is an Equal Opportunity Provider and Employer. Street Lighting Technology Briefing March,2013 Problem Statement • EXISTING LOW PRESSURE SODIUM • Traffic Safety Hazard • No Color Rendering for Emergency Responders • Light Pollution • High Operation and Maintenance Costs Problem One -Traffic Hazard The amber traffic light has the same color as the LPS street light. Causes confusion for drivers approaching an intersection. The confusion is compounded with poor weather. Solution - Install a street light that emits a colored light different than the amber traffic light. 1 Problem One -Traffic Hazard Can you tell which light is to regulate traffic and which is to light the street? Problem Two - Color Rendering Colors must be seen by Emergency Responders. All colors appear Amber/Yellow with LPS. This can result in mistakes by EMTs. Solution -Install a broader spectrum street light that allows the Emergency Responder to distinguish colors LPS Source Filtered LED Source At 71,41 gair Problem Three - Light Pollution • • • i • °. Utah Section - International Dark Sky Association r � i 2 Problem Three - Light Pollution White light is a poor option for astronomical studies.The blue light portion of white light scatters in the atmosphere,causing light pollution that jeopardizes the night sky. Solution—Install street lights with a Spectral Power Distribution that has a low blue content AND a color different from the amber traffic light at intersections and crosswalks. Problem Three- Light Pollution Sky Quality 1.0 : i: : : : i : , : : (, ... i, ,i ,) :: : : i: ,) 11 :4 : 5 a - I . - i i _ w 0.6---'crwwwoien,uon of Wecommeneed ! I i - g _ iarc.m.nwwnnnm I ..wi.wiwmaereky I i i I _.quality j I I - $ oneenwrewt I _ _-___.t?S A N D Amber t Rafilc lighti._...._._._..._ 0.0 400 450 500 550 600 650 700 750 Wavelength(nm) Problem Three- Light Pollution Human Vision —8aotple ow w W tbo 6.1)tr(am.) 1 2:-.... ......................._www.O.O+d+rwyt w..q n..C.'..(cow)._ r N F. :_ ' - o.e-i I. i i - f. t : : : .1 - II i - 400 450 500 560 600 650 700 750 Wavelength(nm) Mod Ko ensn Wow Red 3 Spectr-I Power Di tribution .-.1 __- _ SPD of existing LPS. —_— _ •Color is confused amber traffic light i _ •But SPD good for astronomy •Shielding is not so good for astronomy .i ..-- - I�—_' r--- SPD of White LED Luminaire I ,.-- — ---4--1-- •Color is different than traffic light i „-— — }- • But SPD is bad for astronomy ,I__� •Shielding is good for astronomy .. --{{ TT � SPD of Yellow LED Luminaire -- A „ •Color is different than traffic light S . . • SPD is good for astronomy i ::'---1__ • Shielding good for astronomy • BRIGHT YELLOW IS A HIGH EYE SENSITIVE COLOR,AND IT ENCOURAGES NO AGGRESSIVF ,SUGGESTING THAT THE USE OF YELLOW LOW PRESSURE SODIUM STREET LIGHTING MAY NOT BE APPROPRIATE FOR EXTERIOR LIGHTING. • SORCE—Dr.Willard R. Daggett, President, International Center for Leadership in Education Problem Four-Cost to Operate/Maintain Solution—Installing LED street lights at intersections and crosswalks is estimated to produce annual savings of over$275,780. .... wmm _ .146 r NAN WN Ad 5.511 IRA9 N.N. *52791.,m N•ffi9...w W!! al*. , 014.40 INS MOM Sal 500711 IM 900717 a 51 al WA* a 27.0s3 rot./far*my,. x I* $,,,, Rlrlu ■ `` 4 Hilo Intersection * 0 • Hilo Intersection Ors '' e . 4 Thank You f 5