Smart Cities Start with Smart Streetlighting

Transcription

1 Smart Cities Start with Smart Streetlighting Greenbuild presentation Nancy Clanton, Clanton & Associates Joe Paulson, City of Boulder Ben Goldstein, City of Westminster

2 WHY LIGHT?

3 Exterior Lighting Design Issues Promote Effective Lighting Design Minimize Environmental and Health Impacts Issues Preserve the Dark Night Sky Minimize glare and obtrusive light

4 Promote Effective Lighting Design

5 Design Effective Streetlighting Do it now!

6 Minimize glare and obtrusive light NGL exterior lighting judging

7 Minimize Environmental and Health Impacts Mid Day: Blue Skylight Stimulates by Suppressing Melatonin Sunrise: Warm Skylight Awakening, Stimulating CIRCADIAN Sunset: Warm Skylight Calming, Dynamic CYCLE Night: Interior Darkness Releases Melatonin Evening: Candlelight Soft, Relaxing

8 Ocular Action Spectra Relative value green 600 red 700 blue Wavelength (nm) Adapted from Brainard et al. Journal of Neuroscience, 2001 Day Vision Night Vision circadian

9 Preserve the Night Sky Measurement

10 Visibility Based Research

11 Tale of Four Cities Anchorage, San Diego, San Jose and Seattle Study

12 Community Involvement

13 Lighting is Safe Subjective 5 = Strongly agree 1 = Strongly disagree 100% 100% 100% 100% DRY WET No statistical difference between responses (100% to 25%)

14 Importance of Lighting Sidewalks

15 Objective Data Was Collected by Virginia Tech Transportation Institute

16 Visibility Test - Targets

17 Detection Distances Safe Stopping distance at 25mph (wet)* HPS 100% LED 25% - 100% HPS 100% LED 25% - 100% LED 25% - 100% LED 25% - 100% *Traffic and Roadway Accident Analysis and..., Issues ; Issue 1467 Average values for all light levels and pavement conditions

18 So, what does this mean for cities?

19 Successful Process Develop Goals & Priorities Evaluate Existing Conditions Prelim. Standards Collaborative Stakeholders, Review & Update Standards Final Standards & Specifications a

20 Develop Goals & Priorities Evaluate Existing Conditions Prelim. Standards Collaborative Stakeholder Involvement, Review & Update Standards Final Standards & Specifications a Aesthetic Character Financial Outdoor lighting Safety & Visibility Environment

21 Develop Goals & Priorities Evaluate Existing Conditions Prelim. Standards Collaborative Stakeholders Involvement, Review & Update Standards Final Standards & Specifications a Gather Outdoor Lighting GIS data

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23 Develop Goals & Priorities Evaluate Existing Conditions Prelim. Standards Safety Concerns

24 Develop Goals & Priorities Evaluate Existing Conditions Prelim. Standards Safety Concerns Measure Contrast Intersections Walkways Unacceptable Target Luminance Values Roadways Acceptable in Limited Areas

25 Collaborative Stakeholder Involvement, Review & Update Standards Develop Lighting Criteria

26 Collaborative Stakeholder Involvement, Review & Update Standards 1-for-1 LED Replacement Potential

27 Install Intelligent Controls Dimming Spectral Tuning Asset Management

28 Streetlight Status Always Available

29 Provides Asset and Operational Status

30 APA Colorado State Conference Steamboat Springs, CO Sept. 30 th, 2015 Joe Paulson, PE, PTOE Transportation Engineer Signals and Lighting City of Boulder, Colorado

31 100,000 people University of Colorado- Boulder: 30,000 students 25 sq mi 4,800 street lights (90% HPS) 2

32 Franchise Agreement with publicly regulated Investor-Owned Utility (IOU) All lighting historically owned by IOU IOU Converted lights from Mercury Vapor to High Pressure Sodium in 1970 s First city-owned lighting project installed in 2007 (Induction lamps) 3

33 City Council let franchise lapse in 2010 Exploring municipalization of electric system Existing lights could be acquired or replaced City installs and owns most new street lights 4

34 98% IOU-owned street lights Non-metered Individual photo cell controlled Primarily HPS cobra head Mix of overhead and underground fed 5

35 State of the Art Economical, Effective, Efficient Lights Cost: Operation & Maintenance Control High performance, full spectrum light sources Dimming Outage notification, special modes Climate: reduce energy use to meet CO2 reduction goals 6

36 63 metered lights watt LED lights on 30 poles watt LED pedestrian lights on 15 poles Control system 7

37 Feature Light Source Luminaire Design Control: Dimming, etc. Outage Notification IOU-Owned (state of practice) High Pressure Sodium Low Bid No Citizen Reports City-Owned (start of art) Full-Spectrum white light Low BUG Yes Remote Monitoring 8

38 IOU-Owned (HPS, MH) $281 per light per year City-Owned (Induction, LED) $100 per light per year 9

39 Change is the norm, so start now Don t seek perfection, just better Control system flexibility Equipment flexibility: 7-pin photo cell receptacle; standard arm connections; standard base Utilizeexisting infrastructure Leverage new infrastructure Test drive equipment: get samples 10

40 Lessons Learned Street Lighting in the City of Westminster Ben Goldstein Senior Management Analyst City of Westminster, Colorado

41 Westminster, Colorado 112,090 $63,344 45, Residents (population) Average Household Income Households Median Age Size of city in square miles 8,000 Street Lights 2

42 What Drove the Conversion of Streetlights? Economic factors Staff driven City Council supported Collaborative 3

43 Goals for Street Lighting Conversion Save money Currently spending $2.25 million annually on 8,000 street lights Save energy Committed to reducing our carbon footprint Reduce maintenance Take advantage of the extended life of LEDs 4

44 What Challenges Will Your City Face? Ashley Morgan Photography Key challenges in Westminster: Existing infrastructure 8,000 approximate lights citywide 28 different lighting and pole types Third-party Utility 3 different owners (2 utilities and Westminster) No energy efficient option provided by the utilities for street lighting No existing rate structure for street lights Lack of available staff time to evaluate and implement 5

45 A Phased Approach to Efficient Street Lighting Started with small steps We installed 4 LED streetlight demonstration sites Based on results from demo sites: Installed LEDs for all new streetlights Planning to install LEDs on streetlights owned by the city Hoping to replace existing lights with LEDs Demonstration location New lights City owned lights All lights 6

46 Evaluating the Return On Your Investment 7

47 General Lessons Learned Own your streetlights Use Interdepartmental teams Technology is always improving Take advantage of industry resources Collaborate, communicate, and convert Colorful sunrise credit Fred Girk 8