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See the Difference at Night
In daylight, 3M reflective sheeting grades can look very similar. At night, the difference is dramatic. The photo compares Engineer Grade on the left, High Intensity Prismatic in the center, and Diamond Grade on the right under headlight illumination. For higher-speed roads, critical intersections, and locations where nighttime visibility matters most, Diamond Grade provides the brightest, most visible sign.
Stop Signs (R1-1)
Ordering 100+? Contact us for volume pricing.
Stop Signs establish a clear stop-control message at an intersection or other location where traffic is required to come to a complete stop. Choose the available configuration that fits the installation and visibility requirements.
- Heavy-duty .080″ rust-resistant aluminum
- Available sizes: 18″ x 18″, 24″ x 24″, 30″ x 30″, and 36″ x 36″
- Reflectivity: Engineer Grade, High Intensity Prismatic, and Diamond Grade DG3
- Standard mounting holes for straightforward installation
The Stop Signs establish a clear stop-control message at an intersection or other location where traffic is required to come to a complete stop.
The sign is produced on heavy-duty .080″ rust-resistant aluminum. Available sizes include 18″ x 18″, 24″ x 24″, 30″ x 30″, and 36″ x 36″. Reflective sheeting options include Engineer Grade, High Intensity Prismatic, and Diamond Grade DG3. Choose the reflectivity level for the nighttime visibility needs, installation environment, and project or agency specification.
MUTCD Section 2B.04 addresses the STOP (R1-1) sign and ALL-WAY plaque. Final selection, size, placement, and installation for an official public-road application should be confirmed against the applicable MUTCD provision and the agency with jurisdiction.
Before installation, confirm the required sign size, mounting location, support, orientation, and local requirements. Matching posts, brackets, and installation hardware can be selected separately.
Product Specifications
- Feature two 3/8″ top and bottom centered, pre-punched mounting holes and can be easily installed on a post, wall or fence
- Constructed of .080 5052-H38 alodine protected aluminum
Additional information
| Dimensions | N/A |
|---|---|
| Size | |
| Reflectivity | Advanced Engineer Grade Prismatic (AEGP) – ASTM Type I, High Intensity Prismatic (HIP) – ASTM Type III, ASTM Type IV, Diamond Grade (DG3) – ASTM Type XI |
Outsmart the Dark with 3M Diamond Grade DG3 Reflective Sheeting
Where Diamond Grade Makes the Biggest Difference
Some locations are more challenging for drivers because road conditions or layout can leave less time to react. 3M Diamond Grade DG3 is engineered to return more light from vehicle headlights back toward the driver, helping signs stand out sooner and from farther away. It’s an ideal choice for:
Sharp curves and blind corners
Hills and winding roads with limited sight distance
Hidden or unexpected intersections
Warning signs that are easy to overlook
Watch the video to see how Diamond Grade can improve sign visibility in higher-risk locations.
Video courtesy of 3M.
8 reviews for Stop Signs (R1-1)
Only logged in customers who have purchased this product may leave a review.
John S –
Heavy duty professional signs. Arrived on time. Good pricing.
William H – Harvey Constr –
Great customer service. Signs are excellent
Del Brent –
Just perfect and thanks
Walt Devine –
You have a new customer! Awesome ordering experience.
Rob Olson –
Great price. Easy process
Merrill Black –
Quick fulfillment of my order.
Dil Verdan –
Perfect! Great price
Dan Blacksmith –
Arrived on time. thanks.