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3M Reflectivity Levels
In daylight, the three sheeting grades look nearly identical. At night, under headlights, the difference is dramatic. The photo above shows engineer grade on the left, high intensity prismatic in the center, and diamond grade on the right.
Which grade you need depends on the sign and where it’s going:
Engineer Grade Prismatic (ASTM Type I)
Our lowest-cost option. Best for parking lots, private property, and low-speed areas.
High Intensity Prismatic (ASTM Type IV)
The most common choice for public roadway signs, and a significant step up in nighttime brightness.
Diamond Grade DG³ (ASTM Type XI)
The brightest sheeting 3M makes. Typically specified for high-speed roads, overhead and guide signs, and high-risk intersections.
If your sign is going on a public right-of-way, check your agency’s specification — most call out an ASTM type or a 3M series number directly.
Do Not Enter Red Sign (R5-1)
Price range: $32.15 through $139.50
Cheap Street Signs commercial grade .080” heavy duty aluminum regulatory traffic and road signs provide drivers clear messages and safety precautions to keep them informed and aware of their surroundings and upcoming hazards and conditions. These road signs reinforce traffic laws, regulations or requirements and are available in various sizes and reflectivity levels, informing drivers of traffic laws and regulations in force. MUTCD compliant road and traffic signs most ready to ship the same day.
- Heavy Duty .080” Aluminum Construction
- Premium 3M Reflective Sheeting
- Prepunched 3/8” Mounting Holes
- MUTCD Complaint Specifications
- 5052-H38 Alodine Treated Aluminum
- Standard Federal Radius Corners
- Durable & Long Lasting
Cheap Street Signs uses only .080″ rustproof aluminum. Don’t settle for low quality signs which will fade quickly and deteriorate after a short time. Our premium quality commercial grade signs are designed to last. Most road signs are available in three reflectivity levels. Engineer grade, high intensity prismatic or diamond grade prismatic. For most applications, choose high intensity reflective to meet State DOT and Federal MUTCD guidelines.
Most road signs come with standard mounting holes centered top and bottom. Larger signs come standard with four mounting holes. Visit our Hardware and Posts section for installation hardware. Please refer to the MUTCD for information on proper installation of road signs.
Visit our Technical Information page for more information on available reflectivity levels, State and Federal DOT requirements.
Hardware, Posts & Brackets
Shopping Cart
Manual on Uniform
Traffic Control Devices
Download or Search MUTCD Manual
Outsmart the Dark with 3M Diamond Grade DG3 Reflective Sheeting
Using science to turn black spots into bright spots. Black spots are places where the number of crashes is higher than average. Often the reason for black spots is the physical configuration of the road or intersection, such as:
• Sharp corners in a straight road, concealing oncoming traffic
• Hills or winding roads that limit visibility ahead
• Hidden junctions and intersections
• Poor or concealed warning signs
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