City of Laredo Downtown Area Street Lighting Upgrade
Mixture of decorative and cobrahead lights
Mixture of City and AEP owned lights
Installed on an as needed/requested basis
AEP Banner policy limits attachments
No through bolts or banner arms allowed
Only banded attachments are permitted
11’ vertical clearance from bottom of banner to sidewalk required by NESC and enforced by AEP
No pole to pole or pole to structure attachments
Existing Lighting Data
Photometric patterns are available for different types and wattages of lighting.
The patterns were obtained for the cobrahead and acorn lights that are in use in the CBD.
There should be some overlap between the light patterns to reduce dark spots.
These photometric patterns were overlaid onto the map of the CBD.
ANSI/IESNA Rp-8-00- Roadway Lighting
Lighting standard identifies appropriate lighting levels for roadways.
Standard is based on roadway type and pedestrian traffic.
Local, Collector, Major, Expressway, Freeway
All of the roads in the CBD are assumed to be local roads, with all intersections being local/local.
Pedestrian traffic is identified as low, medium, or high in the lighting standard.
Low: 10 or fewer
High: over 100
Standard is only concerned with pedestrian traffic after dark, daytime is not considered.
All roads are assumed to have a medium level of pedestrian traffic.
Recommended Illumination Levels
Roadway Classification (R3)
Pedestrian Confict Area
Minimum Maintained Average Illumination (Foot Candles)