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Home My WebLink AboutAGENDA REPORT 1999 0721 CC REG ITEM 10BISM 1U.8 . CITY OF MOORPARK, CALIFORNIA Cam( Council Meeting of - � I �-� I C),q ACTION: N U-i :Uj 0 0 A W, LVW� g,, *Iva P-Plo �C 9 � �f'1 �� 4 � i l i;L'� 1-}P �.(`rnrn i tf•e� CITY OF MOORPARK RY d=2,t _„_ J bCkCK � �vYX_d . ttt((( AGENDA REPORT TO: The Honorable City Council <� L FROM: Dirk Lovett, Assistant City Engineer (Prepared by; Jim Colton, Associate Civil Engineer) DATE: June 22, 1999 (City Council Meeting of 7/7/99) SUBJECT: STREET LIGHT STANDARD RESEARCH REPORT BACKGROUND: On March 3, 1999 the City Council reviewed a report of Moorpark's Street lighting standards. At that time, Staff was further directed to research other local agencies' street light standards related to the spacing and placement of street lights and intensity of luminaries. Staff was also directed to report on the use of cut -off lenses verses drop lenses, and the cost of retrofitting street lights with cut -off lenses. DISCUSSION: Staff conducted research mainly through structured interviews with local agencies and Southern California Edison per City Council directive. The following paragraphs summarize the results. OTHER AGENCIES: Staff contacted the following five cities to obtain the above each city's street light standards: 1. Thousand Oaks 2. Camarillo 3. Simi Valley 4. Santa Paula S. Oxnard City Council Agenda Street Light Standard Research Report Page 2 07/15/99 Each of the five cities provided their respective street light standards. The following table shows a summary of Moorpark street light information followed by the same information collected for the five cities. STREET TYPE SPACING LOCATION LUMEN HEIGHT LUMEN HEIGHT Local 180' -240' Determined by City 5800 25' -28' - Comm /Ind. 200' Determined by City Engineer 30' - Residential 200' Traffic Engineer Collector Collector Arterial Determined by City - Commercial - Comm /Ind. 200' - Comm /Ind. 200' -250' Both sides of street 22000 28' -32' - Residential 180' -240' Both sides of street 5800 25' -28' Arterial - Commercial 200' -250' Determined by - Commercial 200' -250' Both sides of street 22000 28' -32' - Residential 200' -250' Both sides of street 16000 28' -32' THOUSAND OAKS STREET TYPE SPACING LOCATION LUMEN HEIGHT LUMEN HEIGH Local 200' -250' Determined by City 5800 5' - Comm /Ind. 200' Determined by City Engineer 30' - Residential 200' Traffic Engineer Collector 30' Arterial Determined by City - Commercial - Comm /Ind. 200' -250' Determined by City 9500/16000 30' - Residential 200' -250' Engineer 9500 30' Arterial - Commercial 200' -250' Determined by City 16000 30' - Residential 1 200' -250' jEngineer 1 16000 30' 0"470WA10TT_TJl STREET TYPE SPACING LOCATION LUMEN HEIGHT Local 220' One Side of street 5800 25' Collector - Comm /Ind. 200' Determined by City 9500 30' - Residential 200' Traffic Engineer 9500 30' Arterial Determined by City - Commercial 200' Traffic Engineer 22000 30' 11-Residential 1 200' 1 1 22000 30' 000010 City Council Agenda Street Light Standard Research Report Page 3 07/15/99 SIMI VALLEY STREET TYPE SPACING LOCATION LUMEN HEIGH Local 180' -240' One Side of street 5800 T Local 250' -350' One Side of street 5800 25' Collector 180' -240' One Side of street 9500 30' - Comm /Ind. 2501- 350' /Varies One Side of street 16000/ 25' Arterial /at intersections 9500 - Residential 250' -350' One side of street 16000 25' Arterial 180' -240' In the median 9500 30' - Commercial 250' -350' ne Side of street 16000 25' - Residential 250' -350' One side of street 16000 25' SANTA PAULA and OXNARD (both CITIES use OXNARD'S Standards) STREET TYPE SPACING LOCATION LUMEN HEIGHT Local 180' -240' One Side of street 5800 25' Collector - Comm /Ind. 180' -240' One Side of street 9500 30' - Residential 180' -240' One side of street 9500 30' Arterial - Commercial 180' -240' In the Median 9500 30' - Residential 180' -240' In the median 9500 30' CUT -OFF LENSES: Southern California Edison maintains street lights in Moorpark. One issue that often is discussed regarding street lights is diffused light which spills onto neighboring property. Modern street light fixtures (installed within the last 5 -6 years) can be equipped with cut -off lenses. However, most of the street lights in the City are not the modern type. The cut -off lens, as the name implies, reduces the diffusion of light from the fixture, thereby reducing the amount of light spilling into neighboring properties. However, by focusing the light downward, it is not spread as evenly along the roadway as a regular lens; thereby, causing bright and dark spots along the length of the street. To retrofit older style fixtures to prevent diffused light, the entire head has to be replaced. New fixtures are equipped, or can generally be retrofitted with lenses that cut off light and focus it downward on the street. 00001 City Council Agenda Street Light Standard Research Report Page 4 07/15/99 To assist in their maintenance efforts, Edison maintains maps of street light locations and an inventory of the number of street lights by brightness. The City receives the Edison maps and inventory when the information is requested. The most recent set of information shows the following numbers of street lights: Lumens Number of lights 4000 214 5800 1146 9500 536 16000 152 22000 207 TOTAL 2255 Although Edison does not maintain summary data regarding exact type of light fixtures in place, they estimate that 80 -85 percent of the street lights in Moorpark are the older style fixtures, which can not have lenses exchanged. To place a cut- off lens in the old style fixture requires that the entire head be changed at a cost of $175 per fixture. For newer styles of fixtures, the lenses can be changed from a drop lens to a cut- off lens for approximately $75 per fixture, depending on brightness, quantity, and location. Considerable additional research would be necessary to develop an accurate cost for modifying all street lights in Moorpark. Based on the limited data contained in this report, it is estimated that the cost to modify all street lights in the city would be $350,000. SUMMARY: Moorpark's cost to update its street lights to minimize light diffusion is $75 /fixture for newer type fixtures and $175 /fixture for older style fixtures. The City has 2255 street lights, 80 to 850 of which have old type fixtures. Total cost to update fixtures is estimated to be $350,000. 000012 City Council Agenda Street Light Standard Research Report Page 5 07/15/99 In comparing the six cities, standards for street lights, it is difficult to identify trends. For example, all six cities use 5800 lumen bulbs for local residential streets; however, bulbs ranging from 5800 to 22000 lumens are specified for collector streets and the range of bulb size for arterials is 9500 to 22000 lumens. Spacing of street lights ranges from a minimum of 180 feet to a maximum of 250 feet for all street types except for Simi Valley, which allows a spacing of 250 to 350 feet. Two cities leave location decisions to a specific technical position within the city staff while the other four cities specify location to be either one side, both sides, or in the median of the street. The following summarizes the highest and lowest and average values for various street lighting data for each street type. The corresponding values for Moorpark are shown for comparison. No policy trends are readily apparent from a review of the other five cities, standards. COMPATIBILITY REVIEW: One element which may have been missing in the design review process utilized in the past, is a more extensive "compatibility" analysis. It is the view of the Public works Department that past street lighting plan checking efforts may not have assessed existing street lighting conditions in areas 000013 LOWEST VALUE HIGHEST VALUE AVERAGE VALUE MOORPARK VALUE LUMENS Local Streets 5800 5800 5800 5800 Collectors 5800 22000 12700 5800/22000 Arterials 9500 22000 15800 16000/22000 SPACING (Feet) Local Streets 180 350 226 180' -240' Collectors 180 350 226 180' -250' Arterials 200 350 230 200' -250' HEIGHT (Feet) Local Streets 25 30 28 25' -28' Collectors 25 30 28 25' -32' Arterials 28 32 30 28' -32' COMPATIBILITY REVIEW: One element which may have been missing in the design review process utilized in the past, is a more extensive "compatibility" analysis. It is the view of the Public works Department that past street lighting plan checking efforts may not have assessed existing street lighting conditions in areas 000013 City Council Agenda Street Light Standard Research Report Page 6 07/15/99 adjacent to the planned new street lights to the degree necessary. The City's street lighting design development and plan checking policies could be revised to require such a review and to make adjustments to provide for a proper transitions between areas of differing lighting intensities. SPECIFIC As noted Specific standards unique to PLANS: in Option #4 below, the City may Plans to include the development of design to address the requirements the Specific Plan area. wish to require street lighting and conditions OPTIONS: Council may wish to consider any of the following options: 1. Maintain current street lighting policy, with the addition of the compatibility review described above. 2. Adjust brightness, spacing, and height policy and establish policy on conditions warranting diffusion suppression based on recent community dialog (Generally, discussions have tended toward lower levels of lighting). 3. Commission a study by a qualified lighting engineering company to develop citywide lighting standards that provide safe driving visibility and minimize neighborhood conflicts. 4. On a case by case basis (especially Specific Plans) , require new development projects to conduct engineering studies to establish a street light system, which will provide optimum lighting levels for the various classes of streets within the development. RECOMMENDATION: Direct staff as deemed appropriate. \MW \JCHD \City Council Street Light Memo \062599 \JW \DL \la ®OOOo.11.4