The NHT Family of Signs and How to Use Them
As you begin, it is important to review the national historic trail family of signs and to understand the various sign types and how they are used. Once you have reviewed the sign types, you will be ready to create a sign plan. The sign plan types and their uses are outlined in detail below. Custom signs are covered at the bottom of the page.
Please note that use of these signs requires explicit approval by the NPS, because the signs include the federally protected California National Historic Trail logo.
SIGN SIZES AND REFLECTIVE QUALITY
The recommended national historic trail standard road sign size is 32 inches by 48 inches. The Historic Site Name sign is generally 36 inches by 48 inches to accommodate the variety of potential site names.
Some signs have a secondary lower sign panel or arrows (please refer to road signs in table above):
These signs are sized for low speed roads to accommodate a 4-inch minimum letter height in compliance with the Manual on Uniform Traffic Control Devices (MUTCD), which is the primary guidance that governs all public roads in the United States. Conditions could exist in which local road jurisdiction may require a smaller or larger size sign. A larger sign will most likely be required for higher speed roads. Ultimately, the agency having jurisdiction over the road or highway has the responsibility for providing direction on the size of the signs required. They may also dictate the quality of reflective sheeting required for the signs, i.e. engineering or high intensity grade.