COS-FF Review Discretionary Development for Glare Effects Along Regional Road Network Roadways

Applicants for future discretionary development projects that include use of reflective surfaces such as metal, glass, or other materials that could produce glare and that the County determines would potentially be visible to motorists traveling along one or more (RRN) roadways shall submit a detailed site plan and list of project materials to the County for review and approval. If the County determines that the project would include materials that would produce disability or discomfort glare for motorists traveling along one or more RRN roadways then the County will either require the use of alternative materials, such as high-performance tinted non-mirrored glass, painted (non-gloss panels), and pre-cast concrete or fabricated textured wall surfaces, or require that the applicant submit a study demonstrating that the project would not introduce a glare source that exceeds 3:1 in a luminance histogram, which consists of inputting a set of digital photographs from a subject glare source into a computer simulation program and generating a graph that identifies the brightness level of different sections of that scene, from darkest to brightest. Glare impacts from future projects would be considered significant when the glare source to the median of the background ration exceeds 3:1 in a luminance histogram.