MUTCD Stop Sign

The stop sign is a standardized sign listed in the Manual of Uniform Traffic Control Devices (MUTCD) with a designation of R1-1. Stop signs are to be used when a full stop is required at an intersection for public roads, parking lots, and private roadways.

First appearing in 1915, the original stop sign featured black text on a white background. The octagonal shape was introduced a few years later in 1922 in order to standardize the shape of the sign.

During a 31 year period from 1924-1955, stop signs were yellow with black text. It wasn't until 1955 when the red signs we see today were released to be consistent with red traffic lights.

Which Size Do I Choose?

Available in 5 sizes:

12 x 12”- Novelty size that’s great for gifts and home decor
18 x 18"- Used for bicycle traffic control on bike paths and shared-use paths
24 x 24"- Great for smaller parking lots with minimal traffic volume and private roadways
30 x 30"- The minimum size required for official street applications
36 x 36"- Minimum size for multi-lane approaches and hazardous intersections

Which Material Do I Choose?

Available in 3 reflective materials:

Engineering Grade 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

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