For effective day / night visibility, R1-1 Stop Signs are offered in three different grades of reflective aluminum:
– Engineering Prismatic (Type I) – great for parking lots and non-official applications
– High Intensity Prismatic (Type IV) – the most common choice for public road use
– Diamond Grade Prismatic (Type IX) – the best choice for public roads, especially dangerous intersections
To ensure compliance and optimal viewing distance, the R1-1 Stop Sign is offered in five sizes ranging from 12" to 36". The R1-3P All-Way plaque is 18 x 6" and manufactured from .063" Engineering Grade Reflective Aluminum.