1200 New Jersey Ave., SE 

 Washington, D.C. 20590 

1

In Reply Refer To: 

HSST-1/CC-173 

Don Pyde 

Valtir, LLC 

15601 Dallas Parkway, Suite 525 

Addison, TX 75001 

USA

Dear Mr. Pyde: 

We received your correspondence of August 4, 2022 requesting issuance of a reimbursement 

eligibility letter under the Federal-aid highway program for the roadside safety system, device, 

design, product, or hardware (collectively “device”) described below. This letter is assigned 

Federal Highway Administration (FHWA) control number CC-173. 

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 headquarters 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. 

March 29, 2023
2

Name of system: ALPHA DXM Truck Mounted Attenuator

Type of system: Truck Mounted Attenuator

Test Level: Test Level 2

Testing conducted by: IDIADA Karco

Date of request: August 4, 2022

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 CC-173 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 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 eligibility letter is assigned 

FHWA control number CC-173. It should only be reproduced in full with its attachment(s). 

This 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 
 

 

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 Aimee Zhang at Aimee.Zhang@dot.gov. 

Sincerely, 

Amy Jackson-Grove 

Acting Director, Office of Safety 

Technologies 

Office of Safety 

Enclosures 

3 
Page 1 of 5 

August 04, 2022 I 

Bret R. Eckert, P.E. 

VALTIR, LLC 

15601 Dallas Parkway, Suite 525, Addison, TX 75001 

USA 

Device & Testing Criterion - Enter from right to left starting with Test Level I ' - ' - ' I 

Test System Type Submission Type Device Name/ Variant Testing Criterion Level 

AASHTO MASH  Physical Crash Testing TL2 'CC': Truck-Mounted ALPHATMDXM Attenuators (TMA)  Engineering Analysi

Contact Name: Don Pyde Same as Submitter 

Company Name: VALTIR, LLC Same as Submitter 

Address: 15601 Dallas Parkway, Suite 525, Addison, TX 75001 Same as Submitter 

Country: USA Same as Submitter 

The ALPHATM DXM Truck Mounted Attenuator ("ALPHATM DXM") system technology is the commercial 

embodiment of intellectual property that was assigned to Energy Absorption Systems, a subsidiary of Valtir, LLC 

("Valtir"). Valtir does not pay royalties for sales of the ALPHATM DXM. The ALPHATM DXM system was designed 

and developed by engineers and employees at Valtir. The patent holders of record for the ALPHATM technology 

are David C. Gertz and Owen S Denman, P.E.; and all are or were employed by Energy Absorption Systems. 

Appl us IDIADA Karco Engineering, LLC (KARCO) conducted the certification tests of the ALPHATM DXM system. 

KARCO is an internationally accredited third party crash testing laboratory. Full-scale crash testing on the 

ALPHATM DXM system was performed in accordance with testing criteria, as set forth by the American 

Association of State Highway and Transportation Officials (AASHTO) in the Manual for Assessing Safety 

Hardware ("MASH") (2016), with 2020 Errata. Other than fees paid to KARCO to conduct the tests and then 

analyze and report the test results, KARCO and Valtir do not share financial interests. The fees paid to KARCO 

were not dependent or contingent on the results of the tests. 

 Version 10.0 (05/16)

Submitter

Request for Federal Aid Reimbursement Eligibility

of Highway Safety Hardware

 Date of Request: New Resubmission

Name:

Company:

Address:

Country:

Michael S. Griffith, Director To: FHWA, Office of Safety Technologies 

I request the following devices be considered eligible for reimbursement under the Federal-aid 

highway program.

By submitting this request for review and evaluation by the Federal Highway Administration, I certify 

that the product(s) was (were) tested in conformity with the AASHTO Manual for Assessing Safety 

Hardware and that the evaluation results meet the appropriate evaluation criteria in the MASH.

Individual or Organization responsible for the product:

Enter below all disclosures of financial interests as required by the FHWA `Federal-Aid Reimbursement 

Eligibility Process for Safety Hardware Devices' document.
 Version 10.0 (05/16)

PRODUCT DESCRIPTION 

CRASH TESTING

Engineer Name: Antonio Reyes 

Reyes 

Engineer Signature: Antonio Reyes Digitally signed by Antonio 

ON: cn=Antonio Reyes, o=Applus ldiada, ou, 

email=Antonio.Reyes@idiada.com, c=US 

Date: 2022.08.03 12:02:1 0 -07'00' 

Address: 9270 Holly Road, Adelanto, CA 92301 Same as Submitter 

Country: USA Same as Submitter 

A brief description of each crash test and its result:

Page 2 of 5 

 New Hardware or

• Significant Modification 

r Modification to 

Existing Hardware 

The ALPHATM DXM is a mobile crash cushion attached to the rear of a support vehicle. It is attached on shadow 

or advanced warning vehicles upstream of moving operations or as a barrier vehicle for stationary work zones. 

The ALPHATM DXM is designed to be used on support vehicles with a minimum weight of 12,200 lbs and a 

maximum weight of 26,500 lbs. The ALPHATM DXM consists of a backup and support assembly and the DXM 

cartridge assembly with LED lighting. The energy absorbing and structural portions of the ALPHATM DXM 

cartridge assembly consist of a fabricated aluminum cell structure with a powder coated exterior finish. The 

ALPHA TM DXM cartridge assembly bolts to the backup and support assembly that attaches to the rear frame of 

the support vehicle with quick release pins. The backup and support structure is fabricated from powder 

coated, structural steel. 

The ALPHATM DXM is 132" long by 94" wide. The system in its deployed orientation is 34.5" high, including the 

nominal height above the ground of 12" ± 1" at the rear of the system. A complete ALPHATM DXM system 

weighs approximately 1160 lbs with the DXM cartridge contributing 390 lbs of the total weight. Lighting 

consists of LED stop, tail, turn, ICC and marker lights in addition to clearance and marker reflectors. The plastic 

Durashell nose covers the rear of the system and striped with reflective tape. 

By signature below, the Engineer affiliated with the testing laboratory, agrees in support of this submission that 

all of the critical and relevant crash tests for this device listed above were conducted to meet the MASH test 

criteria. The Engineer has determined that no other crash tests are necessary to determine the device meets 

the MASH criteria. 
 Version 10.0 (05/16)
 Version 10.0 (05/16)

Page 4 of 5 

Required Test 

Number 

Narrative 

Description 

Evaluation 

Results 

Applus IDIADA KARCO Test No. P42028-01. 

Test Date March 23, 2022. Crash Test Repor

No. TR-P42028-01-NC for MASH Test 2-52 

Crash Test of the Valtir ALPHATM DXM Truck 

Mounted Attenuator. 

The Truck Mounted Attenuator (TMA) was 

impacted by a 2016 RAM 1500 4-door 

pickup truck. The test vehicle impacted the

ALPHATM DXM TMA at a velocity of 45.27 

mph (72.86 km/h) and an impact angle of 

0.4°. The ALPHATM DXM brought the vehicle

to a controlled stop. The maximum 

dynamic deflection of the system was 7.3 ft.

(2.2 m). The impact was absorbed by the 

ALPHATM DXM and the support truck moved

forward in a controlled manner. The vehicle

experienced a maximum occupant impact 

velocity (OIV) of 32.5 ft/s (9.9 mis) and a 

maximum ridedown acceleration (RA) of 

-16.4 g. The occupant compartment was 

not penetrated and the deformation limits 

were not exceeded. The Valtir ALPHATM 

DXM Truck Mounted Attenuator met all the

requirements for MASH 2016 Test 2-52. 

t 

2-52 (2270P) PASS 

Appl us IDIADA KARCO Test No. P42018-01. 

Test Date February 2, 2022. Crash Test 

Report No. TR-P42018-01-NC for MASH Test 

2-53 Crash Test of the Valtir ALPHATM DXM 

Truck Mounted Attenuator. 

The Truck Mounted Attenuator (TMA) was 

impacted by a 2017 RAM 1500 4-door 

pickup truck. The test vehicle impacted the 

ALPHATM DXM TMA at a velocity of 44.84 

mph (72.17 km/h) and an impact angle of 

9.7°. The ALPHATM DXM brought the vehicle 

to a controlled stop. The maximum 

dynamic deflection of the system was 7.8 ft. 

(2.4 m). The impact was absorbed by the 

ALPHATM DXM and the support truck moved 

forward in a controlled manner. The vehicle 

experienced a maximum occupant impact 

velocity (OIV) of 31.2 ft/s (9.5 m/s) and a 

maximum ridedown acceleration (RA) of 

-12.0 g. The occupant compartment was 

not penetrated and the deformation limits 

were not exceeded. The Valtir ALPHATM 

DXM Truck Mounted Attenuator met all the 

requirements for MASH 2016 Test 2-53. 

2-53 (2270P) PASS 
 Version 10.0 (05/16)

Page 5 of 5 

Full Scale Crash Testing was done in compliance with MASH by the following accredited crash test 

laboratory (cite the laboratory’s accreditation status as noted in the crash test reports.):

Laboratory Name: KARCO Engineering, INC 

Address:

Country:

Accreditation Certificate 

Number and Dates of current 

Accreditation period :

ATTACHMENTS

Attach to this form: 

1) Additional disclosures of related financial interest as indicated above. 

2) A copy of the full test report, video, and a Test Data Summary Sheet for each test conducted in 

support of this request. 

3) A drawing or drawings of the device(s) that conform to the Task Force-13 Drawing Specifications 

[Hardware Guide Drawing Standards]. For proprietary products, a single isometric line drawing is 

usually acceptable to illustrate the product, with detailed specifications, intended use, and contact 

information provided on the reverse. Additional drawings (not in TF-13 format) showing details that 

are relevant to understanding the dimensions and performance of the device should also be submitted 

to facilitate our review. 

FHWA Official Business Only:

Eligibility Letter

Number Date Key Words

The results of the Occupant Risk Estimation 

for a 1500A Vehicle found in MASH 2016 

Appendix G was conducted utilizing the 

accelerometer data from Test 2-51 on the 

Valtir ALPHATM DXM. 

The estimated OIV and RA values were 

found to comply with the evaluation criteria

set forth in Chapter 5 of the Manual for 

Assessing Safety Hardware (MASH 2016). 

2-54 (1500A) Non-Relevant Test, not conducted 

Digitally signed by Antonio Reyes 

DN: cn=Antonio Reyes, o=Applus ldiada, ou, 

email=Antonio.Reyes@idiada.com, c=US Antonio Reyes Date: 2022.08.03 12:01 :37 -07'00' 

Laboratory Signature: 

9270 Holly Road, Adelanto, CA 92301 Same as Submitter D 

USA Same as Submitter D 

International Accreditation Services (IAS) 

ISO 17025 Accreditation Certificate #TL-371 

Expires April 27, 2024 

B ret E C k ert Digitally signed by Bret Eckert 

Submitter Signature*: Date:2022.08.0416:14:36 

-07'00' 
 

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MASH 2016 Test 2-50 Summary 

0.000 seconds 0.050 seconds 0.100 seconds 0.250 seconds 0.275 seconds 

GENERAL INFORMATION 

Test Agency Applus IDIADA KARCO 

Test Number P41361-01 

Test Designation 2-50 

Test Date 12/15/21 

TEST ARTICLE 

Name / Model ALPHATM DXM 

Truck Mounted Attenuator

Type Truck Mounted Attenuator

Support Vehicle Length 28.2 ft. (8.6 m) 

TMA Length 11.0 ft. (3.35 m)

Road Surface Smooth, Clean Concrete

Support Vehicle Restraint None 

TEST VEHICLE 

Type / Designation 1100C 

Year, Make, and Model 2015 Kia Rio 

Curb Mass 2,561.7 lbs (1,162.0 kg)

Test Inertial Mass 2,437.2 lbs (1,105.5 kg)

Gross Static Mass 2,621.3 lbs (1,189.0 kg)

Impact Conditions 

Impact Velocity 42.46 mph (68.34 km/h) 

Impact Angle -0.3° 

Location / Orientation 0.2 in. (5 mm) Right of Truck 

Mounted Attenuator Centerline 

Kinetic Energy 146.9 kip-feet (199.2 Kilojoules) 

Minimum KE 141.0 kip-feet (191.0 Kilojoules) 

Exit Conditions 

Exit Velocity Not Applicable 

Exit Angle Not Applicable 

Final Vehicle Position 3.5 ft. (1.1 m) Upstream 

1.5 ft. (0.5 m) Driver Side 

Support Vehicle Roll Ahead 1.4 ft. (0.4 m) Downstream

Vehicle Snagging None 

Vehicle Pocketing None 

Vehicle Stability Satisfactory

Maximum Roll Angle -1.5 ° 

Maximum Pitch Angle 2.0 ° 

Maximum Yaw Angle 10.4 ° 

Occupant Risk 

Longitudinal OIV 36.1 ft/s (11.0 m/s) 

Lateral OIV 2.3 ft/s (0.7 m/s) 

Longitudinal RA -18.1 g 

Lateral RA -2.2 g 

THIV 36.1 ft/s (11.0 m/s) 

PHD 18.2 g 

ASI 1.42 

Test Article Deflections 

Static 5.7 ft. (1.7 m)

Dynamic 5.7 ft. (1.7 m) 

Working Width Not Applicable 

Debris Field Not Applicable 

Vehicle Damage 

Vehicle Damage Scale 12FD-2 

CDC 12FCMW1 

Maximum Intrusion 0.0 in. (0 mm) 

Figure 3 Summary of Test 2-50 

20 TR-P41361-01-B 
 

 

 

 

 

MASH 2016 Test 2-51 Summary 

0.000 seconds 0.100 seconds 0.200 seconds 0.900 seconds 1.100 seconds 

GENERAL INFORMATION 

Test Agency Applus IDIADA KARCO 

Test Number P42056-01 

Test Designation 2-51 

Test Date 03/11/22 

.................... 

........................ 

............ 

..................... 

TEST ARTICLE 

Name / Model ALPHATM DXM 

Truck Mounted Attenuator 

Type Truck Mounted Attenuator 

Support Vehicle Length 28.2 ft. (8.6 m) 

TMA Length 11.0 ft. (3.35 m) 

Road Surface Smooth, Clean Concrete 

Support Vehicle Restraint None 

................. 

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................ 

.... 

TEST VEHICLE 

Type / Designation 2270P 

Year, Make, and Model 2016 Ram 1500 

Curb Mass 5,080.5 lbs (2,304.5 kg) 

Test Inertial Mass 5,035.3 lbs (2,284.0 kg) 

Gross Static Mass 5,035.3 lbs (2,284.0 kg) 

.......... 

.... 

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Impact Conditions 

Impact Velocity 45.53 mph (73.27 km/h) 

Impact Angle 1.1° 

Location / Orientation 0.6 in. (15 mm) Passenger Side of Truck 

Mounted Attenuator Centerline 

Kinetic Energy 502.0 kip-feet (473.5 Kilojoules) 

Minimum KE 291.0 kip-feet (395.0 Kilojoules) 

................ 

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Exit Conditions 

Exit Velocity Not Applicable 

Exit Angle Not Applicable 

Final Vehicle Position 10.8 ft. (3.3 m) Downstream 

0.3 in. (6 mm) Driver Side 

Support Vehicle Roll Ahead 8.0 ft. (2.4 m) Downstream 

Vehicle Snagging None 

Vehicle Pocketing None 

Vehicle Stability Satisfactory 

Maximum Roll Angle -2.2 ° 

Maximum Pitch Angle -5.2 ° 

Maximum Yaw Angle 1.1 ° 

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Occupant Risk 

Longitudinal OIV 33.5 ft/s (10.2 m/s) 

Lateral OIV -1.6 ft/s (-0.5 m/s) 

Longitudinal RA -17.9 g 

Lateral RA 1.6 g 

THIV 33.5 ft/s (10.2 m/s) 

PHD 17.9 g 

ASI 1.31 

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Test Article Deflections 

Static 7.3 ft. (2.2 m) 

Dynamic 7.3 ft. (2.2 m) 

Working Width Not Applicable 

Debris Field Not Applicable 

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Vehicle Damage 

Vehicle Damage Scale 12-FD-1 

CDC 12FDLW1 

Maximum Intrusion 0.0 in. (0 mm) 

...... 

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Figure 3 Summary of Test 2-51 

20 TR-P42056-01-A 
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20 TR-P42028-01-A 

MASH 2016 Test 2-52 Summary

0.000 seconds 0.082 seconds 0.164 seconds 0.410 seconds 0.656 seconds

GENERAL INFORMATION

Test Agency Applus IDIADA KARCO

Test Number P42028-01

Test Designation 2-52

Test Date 03/23/22

TEST ARTICLE

Name / Model ALPHATM DXM 

Truck Mounted Attenuator

Type Truck Mounted Attenuator

Support Vehicle Length 28.2 ft. (8.6 m)

TMA Length 11.0 ft. (3.35 m)

Road Surface Smooth, Clean Concrete

Support Vehicle Restraint None

TEST VEHICLE

Type / Designation 2270P

Year, Make, and Model 2016 Ram 1500

Curb Mass 5,087.1 lbs (2,307.5 kg)

Test Inertial Mass 5,028.7 lbs (2,281.0 kg)

Gross Static Mass 5,028.7 lbs (2,281.0 kg)

Impact Conditions

Impact Velocity 45.27 mph (72.86 km/h)

Impact Angle 0.4°

Location / Orientation 0.4 in. (10 mm) 1/3 the Vehicle Width

Truck Mounted Attenuator Centerline

Kinetic Energy 344.6 kip-feet (467.2 Kilojoules)

Minimum KE 291.0 kip-feet (395.0 Kilojoules)

Exit Conditions

Exit Velocity Not Applicable

Exit Angle Not Applicable

Final Vehicle Position 26.1 ft. (7.9 m) Driver Side

1.7 ft. (0.5 m) Downstream

Support Vehicle Roll Ahead 5.5 ft. (1.7 m) Downstream

Vehicle Snagging None

Vehicle Pocketing None

Vehicle Stability Satisfactory

Maximum Roll Angle -4.7°

Maximum Pitch Angle -8.5°

Maximum Yaw Angle 21.3°

Occupant Risk

Longitudinal OIV 32.5 ft/s (9.9 m/s)

Lateral OIV 1.6 ft/s (0.5 m/s)

Longitudinal RA -16.4 g

Lateral RA -3.2 g

THIV 32.5 ft/s (9.9 m/s)

PHD 16.5 g

ASI 1.17

Test Article Deflections

Static 7.3 ft. (2.2 m)

Dynamic 7.3 ft. (2.2 m)

Working Width Not Applicable

Debris Field Not Applicable

Vehicle Damage

Vehicle Damage Scale 12-FR-2

CDC 12FZLN1

Maximum Intrusion 0.0 in. (0 mm)

Figure 3 Summary of Test 2-52 
 

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MASH 2016 Test 2-53 Summary 

0.000 seconds 0.070 seconds 0.140 seconds 0.490 seconds 0.770 seconds

GENERAL INFORMATION 

Test Agency Applus IDIADA KARCO 

Test Number P42018-01 

Test Designation 2-53 

Test Date 02/02/22 

TEST ARTICLE 

Name / Model ALPHATM DXM 

Truck Mounted Attenuator

Type Truck Mounted Attenuator

Support Vehicle Length 28. 2 ft. (8.6 m) 

TMA Length 11.0 ft. (3.35 m) 

Road Surface Smooth, Clean Concrete

Support Vehicle Restraint None 

TEST VEHICLE 

Type / Designation 2270P 

Year, Make, and Model 2017 RAM 1500 

Curb Mass 5,226.0 lbs (2,370.5 kg) 

Test Inertial Mass 5,008.8 lbs (2,272.0 kg) 

Gross Static Mass 5,008.8 lbs (2,272.0 kg) 

Impact Conditions 

Impact Velocity 44.84 mph (72.17 km/h) 

Impact Angle 9.7° 

Location / Orientation 0.87 in. (22 mm) An angle of 10°, 

1/4 the Vehicle Width to the Truck 

Mounted Attenuator Centerline 

Kinetic Energy 336.7 kip-feet (456.5 Kilojoules) 

Minimum KE 291.0 kip-feet (395.0 Kilojoules) 

Exit Conditions 

Exit Velocity Not Applicable 

Exit Angle Not Applicable 

Final Vehicle Position 19.3 ft. (5.9 m) Downstream 

10.3 ft. (3.2 m) Passenger Side 

Support Vehicle Roll Ahead 20.2 ft. (6.2 m) Downstream Side 

Vehicle Snagging None 

Vehicle Pocketing None 

Vehicle Stability Satisfactory 

Maximum Roll Angle 5.8° 

Maximum Pitch Angle -7.3° 

Maximum Yaw Angle -57.0° 

Occupant Risk 

Longitudinal OIV 31.2 ft/s (9.5 m/s) 

Lateral OIV -4.6 ft/s (-1.4 m/s)

Longitudinal RA -12.0 g 

Lateral RA 4.3 g 

THIV 31.5 ft/s (9.6 m/s) 

PHD 12.3 g 

ASI 0.97 

Test Article Deflections 

Static 7.8 ft. (2.4 m) 

Dynamic 7.8 ft. (2.4 m) 

Working Width Not Applicable 

Debris Field 12.75 in. (326 mm) Downstream 

10.75 in. (271 mm) Passenger Side

Vehicle Damage 

Vehicle Damage Scale 11-FL-3

CDC 11FLEW6 

Maximum Intrusion 0.0 in. (0 mm) 

Figure 3 Summary of Test 2-53 

20 TR-P42018-01-A 
2022 

ALPHA DXM TRUCK MOUNTED ATTENUATOR 

SWTxx 

SHEET NO. DATE 

1 of 2 6/30/2022 

QMS-FE-051 Rev 0, 6/29/22 
 

INTENDED USE 

The ALPHATM DXM is a Truck-Mounted Attenuator (TMA) for use on stationary or moving

shadow support vehicles. The ALPHATM DXM TMA is comprised of an aluminum cartridge

attached to a steel support frame. The ALPHATM DXM is designed to be used on support vehicles

with a minimum weight of 12,200 lbs [5,534 kg] and a maximum weight of 26,500 lbs [12,020 kg]. 

FEATURES 

The ALPHATM DXM consists of a support frame and an energy absorbing cartridge fitted with a

Durashell nose for additional protection from nuisance impacts. The support frame secures the

cartridge to the support vehicle and utilizes a 90° tilt feature to move the system upright, so the

cartridge is vertical enabling support vehicle transportation. 

SPECIFICATIONS 

In its deployed state, the ALPHATM DXM TMA measures 11.0 ft [3.4 m] long by 7.8 ft [2.4 m]

wide and has a ground clearance of 12.0 in ± 1.0 in [305 mm ± 25 mm]. The total system length is

11.0 ft [3.4 m] long from the hitches of the support vehicle to the end of the cartridge and when the 

cartridge is stored in the upright position, it stands 11.3 ft [3.4 m] from the ground. 

Cartridge Dimensions:

Length: 8.3 ft [2.5 m]

Width: 7.8 ft [2.4 m]

Height: 22.5 in [572 mm] 

ELIGIBILITY 

The ALPHATM DXM has been tested in conformance to MASH 2nd Edition (2016) and is eligible

for Federal-aid reimbursement by FHWA. 

FHWA Eligibility Letter(s): CC­ dated for MASH 2016 Test Level 2

REFERENCES 

American Association of State Highway and Transportation Officials (AASHTO), Manual for 

Assessing Safety Hardware (MASH), 2nd Edition (2016) with 2022 Errata. 

CONTACT INFORMATION

 15601 Dallas Parkway, Suite 525 Addison, TX 75001

Telephone: (888) 323-6374

www.valtir.com 

ALPHA DXM TRUCK MOUNTED ATTENUATOR 

SWTxx 

SHEET NO. DATE 

2 of 2 6/30/2022 

QMS-FE-051 Rev 0, 6/29/22