Specifications

ITE Specifications

The Institute of Transportation Engineers (ITE) specifications for traffic and pedestrian signals are found on this page:
http://www.ite.org/standards/led/signals.asp

U.S. Environmental Protection Agency ENERGY STAR Traffic Signal Specification

The ENERGY STAR requirements for LED traffic signals are listed on this page:
https://www.energystar.gov/ia/partners/product_specs/eligibility/traffic_elig.pdf

Energy Policy Act Requirements for Traffic Signals

The 2005 Energy Policy Act included requirements for traffic signals within this document:
https://www1.eere.energy.gov/buildings/appliance_standards/pdfs/epact2005_appliance_stds.pdf