Sign Sheeting Material/Roll Up Signs (SSM/RUP)

Sign visibility and legibility is important in providing guidance to the traveling public. Sign sheeting material is designed with specific colors and retroreflectivity levels to enhance visibility to the driver during the day and night. This material is also designed to be durable over specific time periods depending on the needs of the user. Sign sheeting performance is evaluated through the NTPEP testing process.

Sign Sheeting Testing History
Sign sheeting material evaluation has been managed through AASHTO’s NTPEP since 1994. Prior to that time, the successful Regional Testing Facility operated by the SASHTO (Southeastern states) administered the program. Under the umbrella of AASHTO, the NTPEP program expanded to the current four outdoor test facilities.

Benefits of the Program
Information reported by NTPEP is widely used by AASHTO member departments for decision on which products to approve for their QPL (Qualified Product Listing.) Participating industry finds benefit from NTPEP participation in reduced costs associated with product marketing and consolidated testing. In addition, an impartial comparison of performance with respect to competitor’s products is achieved through industry’s NTPEP participation.

SSM (Rigid and Reboundable Sign Sheeting)
NTPEP evaluation of rigid and reboundable sign sheeting materials consists of three-year, accelerated outdoor exposure on fabricated test panels. Sheeting panels are tested for retroreflectivity, color, and visual appearance initially and after 6, 12, 24, and 36 months. Also, a series of laboratory tests are conducted on the new sign sheeting material. All testing is in accordance with ASTM D 4956 specification. Lab and field testing is conducted through state DOT cooperatively, including the following states: Virginia (lead state), Louisiana, Minnesota, Arizona and Missouri. Industry participating in NTPEP evaluations includes all major manufacturers of sign sheeting materials.

RUP (Rollup Sign Sheeting)
In parallel, NTPEP evaluation of rollup sign sheeting materials consist of a one-year accelerated outdoor exposure of fabricated rollup test panels. Rollup samples are tested for retroreflectivity, color, and visual appearance initially and after 1, 2, 3, 4, 5, 6, 9, and 12 months. Also, a series of laboratory tests are conducted on the new rollup sheeting material. All testing is in accordance with ASTM D 4956 specification. Lab and field testing is conducted through state DOT cooperatively, including the following states: Louisiana (lead state), Minnesota, Arizona. Industry participating in NTPEP evaluations includes all major manufacturers of rollup sign sheeting which are commonly used in daytime utility and maintenance work zone applications.

Testing Results
Test result data is entered into the web-based Data Mine program where it is reviewed and approved by industry prior to being made accessible to the public.

NTPEP Annual Meeting
The NTPEP Technical Committee for SSM and RUP convenes yearly at the NTPEP Annual Meeting to discuss with Industry the current Project Work Plans and any modifications needed. Any changes to the Work Plan are balloted for adoption. Improvements are immediately implemented in the next available testing cycle thus promoting an efficient and effective testing program.

NTPEP Designated Labs:

SSM:

  • Virginia Department of Transportation
  • Louisiana Department of Transportation
  • Arizona Department of Transportation
  • Missouri Department of Transportation
  • Minnesota Department of Transportation

RUP:

  • Louisiana Department of Transportation
  • Arizona Department of Transportation
  • Minnesota Department of Transportation

NTPEP - Sign Sheeting Material and Roll Up Signs


Committee Name:
NTPEP-Technical Committee on Sign Sheeting Material and Roll-Up Signs
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Work Plan
NTPEP tests products according to a Project Work Plan, which describes the laboratory and/or field test protocols used to conduct the evaluation. The Project Work Plan is a consensus-based document and includes peer review and input from industry experts. Each Project Work Plan is adopted after receiving at least two-thirds affirmative support from 52 AASHTO member states. The Project Work Plan is the basis for host states to conduct their testing and evaluation. When implemented by state DOTs, their own state standard specifications may supersede the NTPEP Project Work Plan. Industry is advised to be aware of state-level requirements, which may supersede basic NTPEP testing.

Project Work Plan for Field and Laboratory Evaluation of Sign Sheeting Materials

Project Work Plan for Field and Laboratory Evaluation of Roll Up Signing Materials

Please go to NTPEP DataMine.

Please go to NTPEP DataMine.