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FHWA Home / Safety / Roadway Departure / Sign Support, Mailboxes & Delineators

Sign Support, Mailboxes & Delineators

This listing contains breakaway sign supports, mailboxes, and delineators that have been issued an Eligibility Letter by FHWA. The FHWA's Federal-aid eligibility letters are provided as a service to the States and are not a requirement for roadside safety hardware to be eligible for Federal-aid reimbursement. As stated in our eligibility letters, "eligibility for reimbursement under the Federal-aid highway program does not establish approval, certification or endorsement of the device for any particular purpose or use." It is the responsibility of the agency who owns the facility to determine whether or not to use a particular hardware device and how to use it for the particular situation. See AASHTO's Roadside Design Guide and AASHTO's Manual for Assessing Safety Hardware for guidance on selecting the appropriate Test Level (TL) based on traffic using the facility.

These devices have been evaluated in accordance with the AASHTO MASH, NCHRP Report 350 or the 1985 and 1994 AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals. Note that breakaway support hardware that was determined to be eligible under either the 1985 or 1994 editions of the AASHTO specifications were determined to meet the NCHRP Report 350 testing guidelines. However, additional testing and evaluation is necessary to meet the current criteria in MASH.

For further information about sign supports, please refer to AASHTO Task Force 13 Guide for Sign Supports, an Online Guide to Sign Support Hardware.

  • Select "MASH" for crashworthy systems per the AASHTO Manual for Assessing Safety Hardware
  • Select "350" for crashworthy systems per NCHRP Report 350
  • Select "All" for both "MASH" and "350".

Recently posted Eligibility Letters are marked with an asterisk (*).

Revised, Wednesday, October 18, 2017




 
Code Date 350/MASH Manufacturer Device Description View PDF Text Version
SS-179 7/3/2013 350 Hori-Zone Concepts / Centerline Supply Centerline Supply Triangular Slipbase Locking Sign Collar Assembly View PDF eligibility letter on Centerline Supply Triangular Slipbase Locking Sign Collar Assembly (PDF, 1.27 MB). (1.27 MB) View Text eligibility letter on Centerline Supply Triangular Slipbase Locking Sign Collar Assembly.
SS-178 2/21/2013 350 Ground Connection LLC Ground Connection Ground Screw Foundation View PDF eligibility letter on Ground Connection Ground Screw Foundation (PDF, 919 KB). (919 KB) View Text eligibility letter on Ground Connection Ground Screw Foundation.
SS-177 2/6/2013 350 MDSolutions Generic Perforated Square Steel Tube Sign Supports View PDF eligibility letter on Generic Perforated Square Steel Tube Sign Supports (PDF, 681 KB). (681 KB) View Text eligibility letter on Generic Perforated Square Steel Tube Sign Supports.
SS-175 5/4/2012 350 Xcessories Squared Surface Mount Slip Bases SMSB10-10-G and SMSB8-10-G View PDF eligibility letter on Surface Mount Slip Bases SMSB10-10-G and SMSB8-10-G (PDF, 417 KB). (417 KB) View Text eligibility letter on Surface Mount Slip Bases SMSB10-10-G and SMSB8-10-G.
SS-174 11/23/2011 350 Trinity Highway Products Breakaway Sign Support Systems of Northwest Pipe Company View PDF eligibility letter on Breakaway Sign Support Systems of Northwest Pipe Company (PDF, 344 KB). (344 KB) View Text eligibility letter on Breakaway Sign Support Systems of Northwest Pipe Company.
SS-173 8/18/2011 350 Special Lite Generic Aluminum Support Pole View PDF eligibility letter on  Generic Aluminum Support Pole (PDF, 67.2 KB). (67.2 KB) View Text eligibility letter on  Generic Aluminum Support Pole.
SS-172 6/23/2011 350 Dent Breakaway Industries, Inc. Omni-Directional Dent Connector Assembly View PDF eligibility letter on Omni-Directional Dent Connector Assembly (PDF, 281 KB). (281 KB) View Text eligibility letter on Omni-Directional Dent Connector Assembly.
SS-171 5/2/2011 350 New York State Department of Transportation Aluminum Pedestrian Signal Pole View PDF eligibility letter on Aluminum Pedestrian Signal Pole (PDF, 422 KB). (422 KB) View Text eligibility letter on Aluminum Pedestrian Signal Pole.
SS-170 11/30/2012 350 Minnesota Department of Transportation Minnesota Type "C" and "D" Braced Leg Sign Supports Supports View PDF eligibility letter on Minnesota Type "C" and "D" Braced Leg Sign Supports
Supports (PDF, 1.05MB). (1.05MB) View Text eligibility letter on Minnesota Type "C" and "D" Braced Leg Sign Supports
Supports.
SS-167 3/3/2011 350 Safety Base Ltd. Safety Base C10S Couplings View PDF eligibility letter on Safety Base C10S Couplings (PDF, 84 KB). (84 KB) View Text eligibility letter on Safety Base C10S Couplings.
SS-165 1/21/2011 350 Designovations, Inc. Snap'n Safe Couplers View PDF eligibility letter on Snap'n Safe Couplers (PDF, 157 KB). (157 KB) View Text eligibility letter on Snap'n Safe Couplers.
SS-164A 4/18/2016 350 POZ-LOCĀ® Slip Base System with Torque Separation Nut Fastener Fastener Optional Fastening System View PDF eligibility letter on Fastener Optional Fastening System (PDF, 712 KB). (712 KB) View Text eligibility letter on Fastener Optional Fastening System.
SS-164 6/18/2010 350 Northwest Pipe Company Poz-Loc 10 inch square slip base system View PDF eligibility letter on Poz-Loc 10 inch square slip base system (PDF, 325 KB). (325 KB) View Text eligibility letter on Poz-Loc 10 inch square slip base system.
SS-163 4/2/2010 350 Information Display Company IDC Speed Check Radar Speed Display Devices View PDF eligibility letter on IDC Speed Check Radar Speed Display Devices (PDF, 2.48 MB). (2.48 MB) View Text eligibility letter on IDC Speed Check Radar Speed Display Devices.
SS-148A 8/16/2011 350 Swing Safe SwingSAFE Swing-Away Mailbox Support View PDF eligibility letter on SwingSAFE Swing-Away Mailbox Support (PDF, 130 KB). (130 KB) View Text eligibility letter on SwingSAFE Swing-Away Mailbox Support.
SS-126B 5/6/2014 350 Trinity Highway Products Perforated Square Steel Tube Sign Supports View PDF eligibility letter on Perforated Square Steel Tube Sign Supports (PDF, 1.44 MB). (1.44 MB) View Text eligibility letter on Perforated Square Steel Tube Sign Supports.
SS-115A 10/23/2013 350 Trinity Highway Products U-Bracket Sign Support View PDF eligibility letter on U-Bracket Sign Support (PDF, 1.68 MB). (1.68 MB) View Text eligibility letter on U-Bracket Sign Support.
SS-36A 4/22/2014 350 Michigan DOT Breakaway Wood Sign Supports with Lag Screws View PDF eligibility letter on Breakaway Wood Sign Supports with Lag Screws (PDF, 1.23 MB). (1.23 MB) View Text eligibility letter on Breakaway Wood Sign Supports with Lag Screws.

Page last modified on October 18, 2017
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Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000