April 24, 2026

In Reply Refer To:

                                                                                                                                    HSST-1/B-393

Diego Santiago Gonzalez

Road Steel Engineering SL

Paseo De Belen, 11 Edificio UVainnova-Campus

1778 Valladolid. 47011

Spain

Dear Mr. Gonzalez:

We received your correspondence on April 4, 2024, requesting issuance of a Federal-aid reimbursement eligibility letter under the Federal-aid highway program for the roadside safety system, device, design, product, or hardware (collectively “device”) described below.  We write to inform you that the device Rent-a-Flash Type II Barricade is eligible for Federal-aid reimbursement. This letter is assigned Federal Highway Administration (FHWA) control number B-393.

Eligibility Letters 

The FHWA issues Federal-aid reimbursement eligibility letters for new roadside safety devices that are crash tested in accordance with the industry standard of the American Association of State Highway and Transportation Officials (AASHTO) Manual for Assessing Safety Hardware (MASH).   

FHWA, the Department of Transportation, and the United States (government) do not regulate roadside safety devices, crash test facilities, or the manufacturing industry.  Issuance of eligibility letters is discretionary and provided only as a service to the states.  FHWA may, at its discretion, decline to issue, revise, or rescind an eligibility letter.  Eligibility letters are only issued by the FHWA Office of Safety.   

Eligibility letters are issued only as notice to the states that a device is eligible for reimbursement under the Federal-aid highway program.  They do not establish approval or certification for any other purpose.  Issuance of an eligibility letter is not a prerequisite or requirement for state transportation agencies seeking to use Federal-aid funds for roadside safety devices.  State agencies may use a device for which an eligibility letter has not been issued and seek Federal-aid reimbursement.      

Federal-aid Reimbursement

The request for issuance of this letter certified the device was crash tested in accordance with the industry standard of AASHTO’s MASH.  This eligibility letter is based on that certification and the material offered in support of its issuance.  The device described below is eligible for reimbursement under the Federal-aid highway program. 

Name of system: Trionda S2-TL4 MASH Barrier

Type of system: Longitudinal Barrier  

            Test Level: Test Level 4

            Testing conducted by: CIDUAT Road Infrastructure Laboratory

            Date of request: April 4, 2024

The device and as-tested condition(s) is described as follows:

TRION DA S2-TL4 MASH is a high containment guardrail made entirely of galvanized steel, consisting of thrie beam rails supported by steel posts with steel spacers. The three-beam rails, posts, and spacers are made of hot-rolled steel sheet with quality S355JR according to EN ISO 10025 and are hot-dip galvanized according to EN ISO 1461. The thrie-beam has a nominal thickness of 2.5 mm. The posts have a C section of 125x80x25 mm, with a nominal thickness of 4.5 mm and a length of 1950 mm. The spacers have a C section of 100x60x25 mm, with a nominal thickness of 4.5 mm and a length of 290 mm. For installation, the top of the thrie-beam rail is located 1000 mm above the ground. The posts are placed every 1.905 m and are installed at a height of 940 mm from the ground. The fixing screws between the thrie-beam rail and the spacers are TBC M16x50 class 8.8 round head bolts, 100x40x5 mm rectangular plates of S235JR quality according to the EN ISO 10025 standard, M 16 washers, and M 16 nuts, following the UNE 135122 standard. Spacers are screwed to the posts using CRF-10.5 M 16x50 class 5.8 round head bolts, 100x40x5 mm, and 35x35x5 mm rectangular plates of S235JR quality according to EN ISO 10025 and Ml 6 nuts following the UNE 135122 standard. Thrie-beam rails use TBC M16x30 class 5.8 round head bolts, Ml 6 washers, and Ml 6 nuts, following the UNE 135122 standard. The CRF-10.5 M 16x50 bolts that join the spacer and the post are tightened with a torque between 30 Nm and 50 Nm. The bolts that join consecutive fences and those that join the spacers and rails are tightened with a torque between 80 Nm and 100 Nm.

Information about the device, including material such as the eligibility request, crash test reports, drawings, or images are included in one or more attachment(s) to this letter.

Eligibility letter B-393 is inapplicable to devices, optional equipment, alternate materials, or other features that were not crash tested in accordance with AASHTO’s MASH. 

This letter is issued only for the subject device as crash tested under AASHTO’s MASH.  Later modification(s) of the device are not eligible for Federal-aid reimbursement under this letter.  Notice of later modification(s) should be given to transportation agencies, facility owners, and operators (collectively “agencies”).

Agencies should be provided appropriate information about the device’s design, installation, maintenance, materials, and mechanical properties. 

Issuance of this letter is discretionary, and it may be revised or rescinded at FHWA’s discretion. This letter is not a determination of compliance with the Build America Buy America Act, the Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD) or ownership of any intellectual property rights. 

This eligibility letter is not a determination by the government that a crash involving the subject device will result in any particular outcome. It is limited to only the device’s eligibility for Federal-aid reimbursement.    

Intellectual Property 

Issuance of this eligibility letter does not convey property rights of any sort nor any exclusive privilege.  This letter is not authorization or consent by the government for the use, manufacture, or sale of any patented or proprietary system, device, design, product, or hardware for which the requester is not the patent owner.  Eligibility letters are not an expression of any view, position, or determination by the government as to the validity, scope, or ownership of any intellectual property rights to a specific device.  These letters do not grant, impute, suggest, or otherwise establish any ownership, distribution, or licensing rights to the requester.  The government expresses no opinion about the intellectual property rights relating to any device for which this or any other eligibility letter is issued.  

Public Disclosure

To prevent any misunderstanding, and as discussed above, this Federal-aid eligibility letter is assigned FHWA control number B-393.  It should only be reproduced in full with its attachment(s).  This Federal-aid eligibility letter and the material offered by the requester supporting its issuance is public information.  All eligibility letters and supporting material are subject to public disclosure under the Freedom of Information Act (FOIA). Eligibility letters are available to the public at  https://safety.fhwa.dot.gov/roadway_dept/countermeasures/reduce_crash_severity/.

If you have any questions please contact Paul LaFleur at Paul.LaFleur@dot.gov. 

Sincerely,

Image

Jessie Yung

Director, Office of Safety Technologies

Office of Safety

Enclosures