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TRN-4.01 - Street Lighting Standards

STREET LIGHTING STANDARDS
Binding City Policy
BCP-TRN-4.01

PURPOSE
 
The Council finds:
  1. The City Council adopted the Street Lighting Standards on February 28, 1980 (Ordinance No. 149210).

  2. The Street Lighting Standards were originally devised for the City of Portland by Industrial Testing Laboratories of Berkeley, California, and recommended acceptable street light illumination on public-rights-of-way within the City of Portland.  It was to be used in conjunction with the Arterial Streets Classification Policy, adopted by Council June 30, 1977, and updated October 27, 1983.

  3. The Arterial Streets Classification Policy update includes the establishment of a new traffic street classification, the District Collector.  This category is most similar to that of a Neighborhood Collector, but collects and distributed traffic over a wider geographic area, or has larger activity/commercial centers.

  4. The Street Lighting Standards should be revised accordingly by the inclusion of footcandle ratios for a District Collector classification to agree with the Policy update.

  5. The adopted Street Lighting Standards also currently recommends an average, horizontal lighting standard (Eh Ave) of > .2 footcandles for all Local Service (residential) streets, plus a uniformity ratio of < 6 (average to minimum footcandles) and the ratio of < 20 (maximum to minimum footcandles).

  6. A recent study of street light spacing and distribution ratios by Lighting Systems Management for the City of Portland Bureau of Street Lighting, determined that the Eh Ave. standard or > .2 is acceptable with lights spaced from 250 feet to 295 feet;  however, the < 6 and/or < 20 light distribution ratios on Local Service streets, where light spacing is 295 feet or more, cannot be obtained.  Therefore, the study recommends these latter ratios be deleted from the Street Lighting Standards.

POLICY
 
NOW THEREFORE, the Council directs:
 
a. The City Council amends the Street Lighting Standards (PDF document, 83Kb) by adding the District Collector classification, and indicating:  the average horizontal (Eh Ave) footcandle standard of 0.7; an average to minimum footcandle ratio of < 3; and the maximum to minimum footcandle ratio of < 9.  The balance of the standards and ratios for luminance and glare in this new classification shall also be added, and will be the same as those for the Neighborhood Collector, Major Transit classification.
 
b. The City Council amends the Street Lighting Standards, Local Service classification, by deleting the < 6 average to minimum footcandle ratio and the < 20 maximum to minimum footcandle ratio. The balance of the standards and ratios for luminance and glare, as well as the average horizontal (Eh Ave) footcandle standard of > .2, remain the same.
 
c. The Bureau of Street Lighting is directed to apply the new Standards to all street light projects within the City of Portland street lighting system.
 
The Street Lighting Standards (83 kb) are in pdf format and require the free Adobe Acrobat Reader .

HISTORY
 
Filed for inclusion in PPD October 29, 2003.
Amended by Ordinance No. 156728, effective November 1, 1984.
Ordinance No. 149210, passed by Council and effective February 28, 1980.