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 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 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.

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

Revised, July 10, 2018

Code	Date	MASH	Manufacturer	Device Description	View PDF	Text Version
SS-182*	2/9/2017	MASH	Xcessories Squared	MASSH-400 Breakaway Slip Base System for Square Steel Tube Sign Support	(5.75 MB)
SS-180	4/15/2016	MASH	Xcessories SQUARED	MASSH-400 Sign Support	(1.41 MB)
SS-179	7/3/2013	350	Hori-Zone Concepts / Centerline Supply	Centerline Supply Triangular Slipbase Locking Sign Collar Assembly	(1.27 MB)
SS-178	2/21/2013	350	Ground Connection LLC	Ground Connection Ground Screw Foundation	(919 KB)
SS-177	2/6/2013	350	MDSolutions	Generic Perforated Square Steel Tube Sign Supports	(681 KB)
SS-175	5/4/2012	350	Xcessories Squared	Surface Mount Slip Bases SMSB10-10-G and SMSB8-10-G	(417 KB)
SS-174	11/23/2011	350	Trinity Highway Products	Breakaway Sign Support Systems of Northwest Pipe Company	(344 KB)
SS-173	8/18/2011	350	Special Lite	Generic Aluminum Support Pole	(67.2 KB)
SS-172	6/23/2011	350	Dent Breakaway Industries, Inc.	Omni-Directional Dent Connector Assembly	(281 KB)
SS-171	5/2/2011	350	New York State Department of Transportation	Aluminum Pedestrian Signal Pole	(422 KB)
SS-170	11/30/2012	350	Minnesota Department of Transportation	Minnesota Type "C" and "D" Braced Leg Sign Supports Supports	(1.05MB)
SS-167	3/3/2011	350	Safety Base Ltd.	Safety Base C10S Couplings	(84 KB)
SS-166	12/7/2010	MASH	North Texas Tollway Authority	NTTA Short Sign Support	(282 KB)
SS-165	1/21/2011	350	Designovations, Inc.	Snap'n Safe Couplers	(157 KB)
SS-164A	4/18/2016	350	POZ-LOC® Slip Base System with Torque Separation Nut Fastener	Fastener Optional Fastening System	(712 KB)
SS-164	6/18/2010	350	Northwest Pipe Company	Poz-Loc 10 inch square slip base system	(325 KB)
SS-163	4/2/2010	350	Information Display Company	IDC Speed Check Radar Speed Display Devices	(2.48 MB)
SS-148A	8/16/2011	350	Swing Safe	SwingSAFE Swing-Away Mailbox Support	(130 KB)
SS-126B	5/6/2014	350	Trinity Highway Products	Perforated Square Steel Tube Sign Supports	(1.44 MB)
SS-115A	10/23/2013	350	Trinity Highway Products	U-Bracket Sign Support	(1.68 MB)
SS-36A	4/22/2014	350	Michigan DOT	Breakaway Wood Sign Supports with Lag Screws	(1.23 MB)