Felipe AlmanzaSenior Engineer

V.P. New Product DevelopmentSan Clemente California

Located in San Clemente CaliforniaHighway Safety Industry 15 yearsDeveloped NCHRP-350 and MASH ProductsDesign Team Developing Work Zone Devices-Water Filled Barrier-End Treatment-Fixed Attenuator-Temporary Work Zone Products-Extensive Design, Development, and Testing

MASHTruck Mounted AttenuatorTest HistoryTest VideoImpact Vehicle ChangesCompare Test StandardsTesting and EvaluationGovernment Review ProcessImplementation Time LineIn Field ImpactsTransition to MASH

Test Procedure Time Line1962-Present Day

Date started endedMany Products DevelopedDetail Sunset DateProducts are no longer being Developed -List countries which use this

United States and CanadaCurrently Using MASH TMA’s.Full Implementation by 2020.

AustraliaCurrently Using MASH TMA’s.Full Implementation One Year

After United States 2021.

United Kingdom, Mexico,Japan and SwedenCurrently Accepts

and 350 MASH TMA’s.

Singapore and New ZealandPlanning Stages for MASH

Implementation

Truck Mounted Attenuator Test configuration NCHRP-350 VS MASHMASH is to compare to NCHRP-350

Optional

Optional

NCHRP-350 MASH

NCHRP-350 Geo Metro MASH KIA Rio

820 kg Geo Metro 1100 kg Kia Rio

280 kg Increase in Weight

NCHRP-350 Chevrolet MASH Dodge Ram

2000 kg Chevrolet 1500 2270 kg Dodge Ram

270 kg Increase in Weight

MASH Test Requirement's

NCHRP-350Recommended that support vehicle for testing

weighed 9000 kg.Stated testing could be conduct for infinite

unlimited weight support vehicle.No mention minimum support vehicle weight.

MASHProvides clear guidance for heaviest and lightsupport vehicle weight used in testing. That

will than apply to in field applications.Three of the four tests are to be conductedwith the heaviest allowable support vehicle.

One of the four tests to conducted withlightest allowable support vehicle.

Test 3-50 Evaluates TMA Impact Performance with Small Car.Test Should be Conducted with the Heaviest AllowableSupport Truck or a Rigidly Blocked Support Truck for

No Upper Support Truck Weight Limit.

Test 3-51 Examines the Energy Dissipation Capacity of the TMA.Test Should be Conducted with the Heaviest Allowable Support

Truck or a Rigidly Blocked Support Truck forNo Upper Support Truck Weight Limit

Test 52 Examines the Capability of a TMA to SafelyAttenuate Off Center Impacts from a Heavy Vehicle.

Test Should be Conducted with the Heaviest AllowableSupport Truck or a Rigidly Blocked Support Truck for

No Upper Support Truck Weight Limit

Test 53 Examine The Capability of a TMA to SafelyAttenuate Off Center Impacts from a Heavy Vehicle.

Test Should be Conducted with the LightestAllowable Support Vehicle

MASHEvaluation Criteria

NCHRP-350Evaluation Criteria

Evaluation Criteria C:Performance may be redirection, controlled

penetration, or controlled stopping of the vehicle.

Examples of Measurement Points for In Cab Deformation

-Roof ≤ 102 mm-Windshield window no tearingor penetrationmax. deformation 76 mm-Foot well ≤ 229 mm-Side front panel ≤ 305 mm-Frt side above seat ≤ 229 mm-Frt side below seat ≤ 305 mm-Frt side above seat ≤ 229 mm-Floor pan and transmissiontunnel ≤ 305 mm

Evaluation Criteria D:Elements, fragments, or debris not penetrateor show penetrate occupant compartment.

Evaluation Criteria F:Vehicle should remain upright during and after collision.Maximum roll and pitch angles not to exceed 75 degrees.

Roll Exceeds 75 Degrees Pitch Exceeds 75 Degrees

Evaluation Criteria H:Occupant Impact Velocity (OIV) should not exceed

a maximum of 12.2 m/s.

Evaluation Criteria I:Occupant Ridedown Acceleration (RA) should not exceed

a maximum of 20.49.

Testing

Submit Form ToFHWA

FHWA FormSubmittal

Signed Formfrom Test Lab

FHWA SignedEligibility Letter

Design