Permanent Road Signs Built to Last

Sign reflectivity is broken down into three primary levels:

• Engineer Grade: Least reflective, typically used for non-critical commercial properties.
• High-Intensity Prismatic (HIP): Highly reflective, standard for municipal roads and regulatory signs.
• Diamond Grade: Maximum reflectivity, mandatory for high-speed highways and critical pedestrian crossings.

Selecting the right grade ensures your signs remain safely visible at night and comply with state and federal laws.

Federal and state DOT standards mandate that any sign posts located within the roadside “clear zone” (areas where a vehicle could run off the road) must be crashworthy. Breakaway bases are designed to shear off cleanly at ground level upon impact. This prevents the post from acting as a rigid spear or stopping a vehicle instantly, drastically reducing the risk of motorist injury.

According to the MUTCD, the standard mounting height for a permanent roadside sign in rural areas is 5 feet from the bottom of the sign to the elevation of the near edge of the pavement. In urban districts, business zones, or areas with pedestrian traffic and parking restrictions, the minimum mounting height is 7 feet to ensure the sign isn’t blocked by vehicles or pedestrians.

If a sign must be placed where concrete or asphalt is already poured, our field crews use specialized core drilling equipment. We drill a clean, precise hole through the hard surface, drive the steel sleeve anchor into the structural soil beneath, and then patch or seal the perimeter neatly, ensuring a rock-solid foundation without damaging the surrounding sidewalk.