3 Step AASHTO NTPEP DOT Geosynthetics Map That Meet Specs
Carthage Mills’ Interactive AASHTO NTPEP DOT Geosynthetics Map
Navigating state-specific regulations for geosynthetic products can be complex. That’s why Carthage Mills has developed an Interactive Map that simplifies the process, helping you quickly determine which of our products meet the requirements of each state’s Department of Transportation (DOT) and the AASHTO Product Evaluation & Audit Solutions program (formerly NTPEP – National Transportation Product Evaluation Program).
How to Use the AASHTO / NTPEP / DOT Map
Take the guesswork out of geosynthetic compliance! Visit our AASHTO NTPEP DOT Interactive Map to see which products meet the requirements for your state and streamline your project planning.
For additional assistance, feel free to contact us. We’re here to help you every step of the way.
Step 1: Select Your State
Simply click on your state to view a list of Carthage Mills products that meet local DOT or AASHTO standards.
Step 2: Review Product Approvals
Each product entry includes application types, compliance details, and links to additional resources like datasheets and certifications.
Step 3: Contact Our Experts
Need more information or a custom solution? Our team is here to help with any state-specific questions or project requirements.

Understanding DOT State Regulations and APLs
Each state’s DOT has unique criteria for approving geosynthetics for use in public projects. These criteria are often outlined in Approved Products Lists (APLs) or similar resources.
- What Are APLs?
APLs are official state documents that specify which products are pre-approved for use in state-funded construction and infrastructure projects. - How Our Products Fit In:
Carthage Mills offers a wide range of geosynthetic solutions that meet or exceed these requirements, ensuring compliance and performance for your projects.
Discover the Benefits of Compliance with Carthage Mills
1. Confidence in Compliance
Ensure your projects meet all necessary regulations with our rigorously tested and approved geosynthetic solutions.
2. Streamlined Project Planning
Easily identify the right products for your needs, saving time and reducing project delays.
3. Trusted Expertise
With over 60 years in the geosynthetics industry, Carthage Mills is a trusted partner for ensuring the success of your infrastructure and construction projects.
You might also be interested in our AASHTO selection guide, check it out now.
* Subject to change without notice
