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Paramount Materials — Geosynthetics

DOT Specified Geotextile Fabric

State-DOT and AREMA-approved geotextiles, stocked by the roll. Pick your state to see the fabrics that meet its transportation-department specification — woven and nonwoven, ready to ship.

Coverage
All 50 states
Standard
AASHTO M288
Shipping
Free · all orders
State DOT & AREMA specs
AASHTO M288 Class 1, 2 & 3
Woven & nonwoven, by the roll

Find your state spec

Geotextiles That Meet Your State's DOT Requirement

Every state transportation department publishes its own geotextile specification, and nearly all of them build on the national AASHTO M288 standard. Choose your state below to see the fabrics that satisfy its DOT requirement, or jump straight to the Spec Finder to match by class and property values.

Know your AASHTO class or property values? Match a compliant fabric by strength, AOS, and permittivity.
Open Spec Finder AASHTO M288 guide
A–Z Select Your State 50 states
Alabama ALDOT Alaska AKDOT Arizona ADOT Arkansas ARDOT California CALTRANS Colorado CDOT Connecticut CONNDOT Delaware DELDOT Florida FDOT Georgia GDOT Hawaii HDOT Idaho ITD Illinois IDOT Indiana INDOT Iowa Iowa DOT Kansas KDOT Kentucky KYTC Louisiana LADOTD Maine MaineDOT Maryland MDOT Massachusetts MassDOT Michigan MDOT Minnesota MnDOT Mississippi MDOT Missouri MoDOT Montana MDT Nebraska NDOT Nevada NDOT New Hampshire NHDOT New Jersey NJDOT New Mexico NMDOT New York NYSDOT North Carolina NCDOT North Dakota NDDOT Ohio ODOT Oklahoma ODOT Oregon ODOT Pennsylvania PennDOT Rhode Island RIDOT South Carolina SCDOT South Dakota SDDOT Tennessee TDOT Texas TxDOT Utah UDOT Vermont VTrans Virginia VDOT Washington WSDOT West Virginia WVDOT Wisconsin WisDOT Wyoming WYDOT
+ Railroad Specification Rail
AREMA Railroad AREMA

Spec guide

How DOT Geotextile Specifications Work

When a project calls for "DOT specified" or "DOT approved" geotextile fabric, it means the fabric has to meet the geotextile requirements published by that state's department of transportation. Almost every state spec is written against one national baseline: AASHTO M288, the standard specification for geotextiles used in highway applications. State DOTs adopt M288 and then layer on their own strength, elongation, or property adjustments, which is why a fabric approved in one state usually meets the requirement in most others.

AASHTO M288 sorts geotextiles into three strength classes based on installation survivability. The class your project needs depends on the aggregate, the subgrade, and how the fabric will be handled during construction:

Class 1
Highest strength. For severe installation conditions — sharp angular aggregate, weak subgrade, or high drop heights where survivability is the priority.
Class 2
Standard. The most commonly specified class, covering typical roadway separation, stabilization, and drainage installations.
Class 3
Lighter duty. For mild installation conditions with favorable subgrade and smaller, well-graded aggregate.

Within each class, M288 also defines the application — separation, stabilization, subsurface drainage, filtration (permanent erosion control), and paving. Each carries its own minimum values for grab strength, tear, puncture, permittivity, and apparent opening size (AOS). The fabrics in every state collection above are matched to these requirements, in both woven and nonwoven constructions, and ship by the full roll with free shipping. To match a specific class or property value to a compliant fabric, use the Geotextile Spec Finder.

Common questions

DOT Geotextile Fabric — Frequently Asked Questions

What is AASHTO M288?

AASHTO M288 is the national standard specification for geotextiles used in highway construction. It defines minimum property requirements — grab strength, tear, puncture, permittivity, and apparent opening size — for each application and installation-survivability class. Most state DOT geotextile specs are written against M288, which is why it's the common reference point across states.

What's the difference between AASHTO M288 Class 1, 2, and 3?

The classes rank geotextiles by installation survivability — how much abuse the fabric can take during placement. Class 1 is the highest strength, for severe conditions like sharp aggregate and weak subgrade. Class 2 is the standard, covering most typical roadway work. Class 3 is lighter duty, for mild installation conditions. Class 2 is the most commonly specified.

How do I find the geotextile spec for my state?

Select your state from the A–Z directory above to see the fabrics that meet its DOT requirement. If you already know the AASHTO class or the property values your project calls for, the Geotextile Spec Finder will match those directly to a compliant fabric.

Is a fabric approved in one state accepted in others?

Usually, yes. Because nearly all state specs derive from AASHTO M288, a fabric that meets the M288 class and application for your project generally satisfies most states' requirements. Some states add their own adjustments, so it's worth confirming against the specific state collection or the published spec for your project.

Do you carry both woven and nonwoven DOT geotextiles?

Yes. Woven geotextiles are typically specified for stabilization and reinforcement where load-carrying strength matters, and nonwovens for separation, filtration, and subsurface drainage where flow matters. Each state collection includes the constructions that meet its DOT requirement, all stocked by the roll with free shipping on every order.

Match a Compliant Fabric in Seconds

The Geotextile Spec Finder narrows every fabric by AASHTO class, strength, AOS, and application — so you can confirm the right DOT-compliant roll yourself. Pricing for most jobs is listed right on the site; need a volume quote? Request one below.

Open Spec Finder Request a volume quote
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