Is roadway lighting required to comply with IESNA RP-10 standards?

The statement that roadway lighting is required to comply with IESNA RP-10 standards is not accurate. IESNA RP-10 is a guideline formulated by the Illuminating Engineering Society of North America that provides recommendations for the lighting of roadways. However, adherence to these standards is not universally mandated by law, and compliance can depend on various factors, including local regulations and specific project requirements.

In many jurisdictions, while the principles outlined in IESNA RP-10 may be encouraged for best practices in roadway lighting, they are not legally required, leading to the conclusion that the correct response is that it's not a requirement. This flexibility allows for adaptations based on the unique circumstances of different areas, such as urban, suburban, or rural environments, as well as variations in construction phases and objectives.

Understanding that adherence to voluntary standards like IESNA RP-10 can enhance safety and performance, particularly regarding visibility for drivers and pedestrians, is essential. Nonetheless, not all roadway lighting projects will be obligated to comply with these specific guidelines.