Minnesota Department of Transportation

511 Travel Info

Approved/Qualified Products

Detectable warning surfaces (truncated domes)-Permanent

For temporary applications, see the Temporary Pedestrian Access Route (TPAR) devices page.

Product Name Manufacturer* Phone Number Approval Date
DURALAST Cast Iron: Coated or Uncoated EJ Foundry (formerly East Jordan Iron Works) 800-874-4100 07/18/05
Cast Iron: Coated or Uncoated Neenah Foundry Co. 800-252-5801 09/08/05
IRON PED Cast Iron: Coated or Uncoated Mfg. by Neenah Foundry Co. 763-478-8128 01/29/10
CAST-DWD OR CAST CORP Cast Iron: Coated or Uncoated Cast Corporation 218-263-9510 04/15/10
CAST-DWD Cast Iron: Coated or Uncoated Pioneer Detectable, LLC 262-370-5355 or 877-270-3663 08/26/10
Advantage Tactile Systems Cast Iron Plates: Coated or Uncoated Mfg. by Waupaca Foundry 800-679-4022 08/10/12, revised 04/21/17
Duratek-CI: Uncoated Detectile Corp. 312-213-1507 10/04/12
TufTile Cast Iron Tiles: Coated or Uncoated TufTile ADA Tactile Products 888-960-8897 06/02/14
Irondome Cast Iron ADA Solutions, Inc. 800-372-0519 03/10/15

*NOTE: Federal Aid Projects require US Code of Federal Regulations 23CFR635.410, the "Buy American Steel and Iron Regulation" be followed. This is stated in the Contract Special Provisions (1601) SOURCE OF SUPPLY AND QUALITY. The iron detectable warning surfaces on this list may or may not be made in the USA. It is the contractors responsibility to ascertain the country of origin before installing or purchasing detectable warning surfaces, if the above regulation applies. At this time MnDOT is only allowing cast iron detectable warning surfaces. Approval Status is based upon the individual foundry and the submitted pattern. A change in the foundry or pattern voids the approval and a new sample must be submitted.