U.S. Deportment 1200 New Jersey Ave., SE 

of Transportation Washington, D.C. 20590 

Federal Highway 


Administration 


In Reply Refer To: ,

.. HSST-1/B-263 

Ms. Karla Lechtenberg 

Midwest Roadside Safety Facility 

130 Whittier Research Center 

2200 Vine Street 

Lincoln, NE 68583-0853 

Dear Ms. Lechtenberg: 

This letler is in response to your November 3, 201 5 request for lhe Federa l J Ji glnvay 

Adrninis!rnlion (PHW/\)lo review a roadside sa l'ely device. hardwa re. nr system for eli gibility 

for rcirn hu rsemt:n! under the 1-'ccleral-aicl highwily program. This 1:1-1 W/\ let!cr or eligibili!y is 

assigned Fl JWA con!rol number B-263 and is valid until a subsequent le!tcr is issued by FHW/\ 

!hat expressly references this device. 

Decision 

The fol lowing devices are e ligible, with details provided in the fo rm which is attached as an 

integral part of!his letter: 

• MGS to Thrie Beam Stiffness Transition with 4-in. Tall Sloped Curb 

Scope of this Letter 

To be fo und el igible for Federal-aid funding, new roadside safety devices should meet !he crash 

test and evalua!ion criteria contained in the Ameri can Associalion of State Highway and 

Transportation Officials' Manual for Assessing Safety Hardware (MASH). However, the 

FHWA, the Department of Transportalion, and the United States Governmcn! do not regulate the 

manufacture of roadside safety devices. 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. 

This letter is not a determination by the PHWA, the Department ofTransportation, or the United 

States Govenunent that a vehicle crash involving the device will result in any particular outcome, 

nor is it a guarantee ofthe in-service performance of this device. Proper manufacturing, 

installation, and maintenance are required in order for this device to function as tested. 

This finding of eligibility is limited to the crashworthiness of the system and does not cover other 

structural features, nor confonnity with the Manual on Uniform Traffic Control Devices. 
2 

Eligibility for Reimbursement 

Based solely on a review of crash test results and certifications submitted by the manufacturer, 

and the crash test laboratory, FHWA agrees that the device described herein meets the crash test 

and evaluation criteria of the American Association of State 1-ligh"vay and Transportation 

Officials' Manua l for Assessing Safety Hardware (MASH). Therefore, the device is eligible for 

reimbursement under the Federal-aid highway program if instal led under the range of tested 

conditions. 

Name of system: MGS to Thrie Beam Stiffness Transition with 4-in. Tall Sloped Curb 

Type ofsystem: Longitudinal Barrier 

Test Level: MASH Test Level 3 (TLJ) 

Testing conducted by: Midwest Roadside Safoty Facility 

Dale of request: November 3, 201 5 

Date initiall y acknowlc:dgcd: Novembcr 15, 2015 

Dak of compl eted package: Apri l l J, 201 <) 

'FJ JWA concurs with the recommendation ofthe accrcdilecl crash !csting laboratory as stated 

within the attached form.' 

Full Description of the Eligible Device 

The device and supporting documentation, including reports of the crash tests or other testing 

done, videos of any crash testing, and/or drav.,1 ings of the device, are described in the attached 

form. 

Notice 

Jr a manufacturer makes any rnodiii cation to any of their roadsiJ e safety hardware that has an 

existing eligibility letter from FHWA, the manufacturer must notify FI-IWA ofsuch modifi cation 

with a request for continued eligibility for reimbursement. The notice of all modifications to a 

device must be accompanied by: 

o 	 Significant modifications - For these modifications, crash test results must be 

submitted with accompanying documentation and videos. 

o 	 Non-signification modifications - For these modifications, a statement from the 

crash test laboratory on the potential effect ofthe modification on the ability of 

the device to meet the relevant crash test criteria. 

FHWA's determination of continued eligibility for the modified hardware will be based on 

whether the modified hardware will continue to meet the relevant crash test criteria. 

You are expected to supply potential users with sufficient information on design, installation and 

maintenance requirements to ensure proper performance. 
3 

You are expected to certify to potential users that the hardware furnished has the same chemistry, 

mechani cal properties, and geometry as that submitted for review, and that it will meet the test 

and evaluation criteri a of the MASH. 

Jssuance of this Jetter does not convey property rights of any sort or any exclusive privilege. This 

letter is based on the premise that information and reports submitted by you are accurate and 

correct. We reserve the right to mod ify or revoke this letter if: (J) there are any inaccuracies in 

the information submitted in support of your request for this letter, (2) the qualification testing 

\Vas fl m.ved, (3) in-service perfo rmance or other informa tion reveals safety problems, (4) the 

system is significantly different from the version that was crash tested, or (5) any other 

information indicates that the letter was issued in error or otherwise does not refl ect full and 

complete information about the crashworthiness of the system. 

St and ard Provisions 

('.' 	 To prevent misunderstanding hy othns. this letter ol"cligibility designated as 1: 11 WA 

conlrnl number n-263 shal l not he rcprnducctl c:-;ccpt in ful l. This kllcr and the lest 

documentation upon whi ch it is based arc public in formation. /\II such letters and 

documentation may be revie'"'ed upon rcciucst. 

o 	 ·1his letter shall not be construed as m1lhoriza1io11 or consent by the Fl !WA to use, 

manufacture, or sell any patented syslcm for whi ch the applicnnl is not the pnlent holder. 

o 	 If the suqject device is a patcntccl product it mny be consiclercc! to be proprietary. Jf 

proprietary systems arc specified by a higln:vay agency for use on Federal-aid projects: 

(a) lhcy must be supplied through cornpctiti ve bidding with equall y suitable unpatented 

items; (b) the J1i oll\vay agency must ccrti Y that they arc essent ial for synchroni za tion 

,,·ith the existi ng highway focili tics or 11la1 no equally suitable altcrnatiw cxisls; or (c) 

they must be used for research or for a distinctive type of construction on relati vely short 

sections of road for experimental purposes. Our regulations concerning proprietary 

products are contained in Tille 23, Code of Federal Regul ations, Section 63 5.4 11. 

Sincerely yours, 

Michael S. Griffith 

Director, Office of Safety Technologies 

Office of Safety 

Enclosures 
Version 9.1 (11/15) 

Page 1 of 4 

Request for Federal Aid Rein1burse1nent Eligibility 

of Highway Safety Hardware 

.... 

Q) 

..... 

·'= E 

.0 

:J 

Vl 

Date of Request: April 11, 2016 I ('New \. Resubmission 

Nam e: Karla Lechten berg 

Company: 

Address: 

Midwest Roadside Safety Facility 

130 Whittier Research Center, 2200 Vine Street, Lincoln, NE 68583-0853 

Count ry: USA 

To: Michael S. Griffith, Director 

FHWA, Office of Safety Technologies 

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

highway program. 

- ·-- - ·-------i-- --­

Tc.:s t Systern Type ubmission Type Device Narne I Variant Testing Criterion Level 

MGS to Thrie Beam AASHTO MASH TL3 'B': Barriers (Roadside, (0 Physical Crash Testing Sti ff1w ~~ T1 amilion with Median, 81 idye 11ailinys) r E119ineC'I ing /\nalysi~ 01 without 4-in. Tall Curb 

--- - -- ---

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

t hat the product(s) was (were) tested in conformity with the AASHTO M anual for Assessing Sa fety 

Hardware and that the evaluation results meet the appropriate evaluation criteri a in t he M/\SH. 

Identification of the individual or organization responsible for the product: 

Contact Nanw : l<iirla Lechtcnberg Sarne as Subrnitter [g) ----------· - Company Name: Midwest Roadside Safety Facility Same as Submitter ~ 

Address: 130 Whittier Resea rch Center, 2200 Vine Street, Li ncoln, NE 68583­ Same as Submitter ~ 

Country: USA Same as Submitter ~ 

Enter below all disclosures of fin ancial interests as required by the FHWA ' Federal-Aid Reimbursement 

Eligibility Process for Safety Hardware Devices' document. 

The Midwest Roadside Safety Facility (MwHSF) and its employees are requesting a letter of eligibi lity on behalf of 

the state departments of transportation participating in the Midwest States Regional Pooled Fund Program. 

MwRSF's financial interests are as follows: 

(i) No compensation, including wages, salaries, commissions, professional fees, or fees for business referrals; 

(ii) Consulting relationships consist of answering design and implementation questions; 

(iii) Research funding or other forms of research support include continuing to fund research projects with 

MwRSF; 

(iv) No patents, copyrights, or other intellectual property interests for this system; 

(v) No licenses or contractual relationships for this system; and 

(vi) No business ownership and investment interests for this system. 
Version 9.1 (11/15) 

Page 2 of 4 

PRODUCT DESCRIPTION 

\. New Hardware or 

Significant Modification 

(' Modification to 

Existing Hardware I 

The Nested MGS W-beam to Thrie Beam Stiffness Transition with or without Curb (STG04a-b) is an adaptation of 

the MGS W-bearn to Thrie Beam Stiffness Transition with Standard Posts (STG03a-b) that allows the stiffness 

transition to be used with or without a curb. It utilizes a 4-in. tall curb placed such that the toe of the curb is 

flush with the back face of the guardrai l. An additional 12-ft 6-in. long, 12-gauge W-bea m segment (RWM04 a) 

was incorporated into the system, such that 12 ft - 6 in. of nested W-beam guardrail precedes the 10-gauge Wto-thrie Transition segment (RWT02a). The Nested MGS W-beam to Thrie Beam Stiffness Transition with Curb 

(STG04a-b) may be used with or without soil backfill installed behind the curb. 

If using a curb, the 4-in. tall curb should be placed through the entire length of the Nested MGS W-beam to 

Tl11 ie 80<m1 Stiffness Tr<1nsition. In othe1 words, the curb should Pxtend from lhf' brid9c through the nestc'd VI/ ­

beam section before being termin;ited ur transitioned to another curb type. It is reco1n111ended to utili1e a 

minimum lcnyth of 3 fl for il 11y cu rb shape trilnsitions or terminations, such <is transition from 4-in. curb to no 

curb./\ minimum of 2 ft ol level 01 ntly sloped fill should be placed behind tht' posts, unless spPcial design 

provisions h;:ivp been mzidc to ilc.c.ount fo1 dcueased post soil 1esistance. 

Although the reference point has been changed to the upstream end of the nested rail segment, these 

recommend<i tions rPsult in the sarnr systPm lengths upstream of the W-to-lhriC' l rLlnsition !->egmcnt (HWl 02ll) 

thilt were recommPndcd for the MGS \IV be<im lo Thrie Beam Stiffness -1 ransition with Sta11cla1cl Posts (STG03ab). The recommendations for utilizing the Nested MGS W-beam to Thi ie 8earn Stiffness Transition with or 

without Curb (STG04a-b} includf': 

(1) The total system length of an acceptable TL-3 guardrail end terminal should be the minimum length of Wbearn guardrail installed upstrea111 of the nested W-beam section. The guardrail terminal's interior end 

(identified by stroke length} should not intrude into the nested W-beam section of the Nested MGS W-bcam lo 

Thrie Beam Stiffness Tri111 sition with or without Curb (STG04a-b). 

(2) /\minimum barrier length of 34 ft - '1Vi in. is recommended to be installed beyond the upslrea 111 end of the 

nested W-beam section, which includes standard MGS, a crashworthy guardrail end terminal, and an acceptable 

anchorage systc.>111. 

(3) For flared gu<irdrilil <1pp l irntion~. a minimum leng th of 12 ft - 6 in. is recommenclecl between the upstrea m 

end of the nested W-bea m section and the start of the flared section (i.e. bend between flare and tangent 

sections). 

(4) For non-blocked MGS applications, a minimum length of 12 ft - 6 in. of standard MGS with spacer blocks 

(SGR20a-c) is to be placed adjacent to the upstream end of the nested W-beam section prior to transitioning to 

a non-blocked, 31-in. tall W-beam guardrail system. 

For further information on implementation recom111endations, see Chapter 9 of MwRSF report no. 

TRP-03-291-14. 

CRASH TESTING 

A brief description of each crash test and its resu lt: 

Required Test 

Number 

Narrative 

Description 

Evaluation Results 

3-1 0 (1 1OOC) 

Test no. 3-1 O is for barrier Length of Need. LON testing for 

MGS was conducted and covered in FHWA letter B-212 of 

6/10/2011. 

Non-Relevant Test, not 

conducted. 

3-11 (2270P} 

Test no. 3-11 is for barrier Length of Need. LON testing for 

MGS was conducted and covered in FHWA letter B-212 of 

6/ 10/2011. 

Non-Relevant Test, not 

conducted. 
Version 9.1 {11/15) 

Page 3 of 4 

Required Test 

Number 

Narrative 

Description Evaluation Results 

3-20 (11 OOC) 

The results of test no. MWTC-2 conducted on November 30, 

2012 are found in MwRSF report no. TRP-03-291-14. A 2,410-lb 

small car with a simulated occupant in the left-front seat, 

impacted the MGS to thrie beam stiffness transition system 

with a 4-in. curb at a speed of 61 .3 mph and at an angle of 

25.6 degrees. At 0.312 sec, the vehicle exited the system at a 

speed of 19.6 mph and al an angle of 11.0 degrees. 

Exterior vehicle damage was moderate, and the interior 

occupant compartment deformations were minimal with a 

maximum of 1 in., consequently not violating the limits 

establ ished in MASH. Damage to the barrier was also 

moderate, consisting of contact marks on and deformation to 

the \1\1-beam rail and the guJrdrail poc;ts and fracturPd wood 

spacer blocks. The maximum lateral d~1 ami c r.iil and post 

deflections were 14.'1 in. and 16.4 in., respectively. The 

working width of the system was 32 . ~ in. All occupant risk 

mci1sur es wcr1' w ithin !hr recommended limits, and tllC' tC'st 

vehicle showed no tendency for rollover. 

PASS 

3-21 (2270P) 

The resultsof test no. MWTC-3 conducted on May 16, 2013 are 

found in MwRSr: reporl no. TRP-03-291 1'1. /\ '1,969-lh pickup 

truck with a simulated occupan t seated in the left-front scat, 

impacted the MGS to thric beam stiffness transition system 

with a Ii-in. curb at a speed of 61.0 mph Jnd al an angle of 

24.4 degrees. At 0.218 sec after impact, the vehicle became 

parallel with the c;ystem. /\l 0.326 sec, the vehicle exited the 

system al a spe~d of 38.3 mph and rit an angle of 11.7 

degrees. 

Exterior vehicle damage was moderate, and the interior 

occupant rnmprirtment deformations were minimal with ;i 

mc1xi mur n of 2 117. in., consequently not violaling the limits 

established in MASH. Damage to the ba rrier was also 

moderate, consi sting of contact marks on and deformation to 

the W-beam rail and the guardrail posts and fractured wood 

spacer blocks. The maximum lateral dynamic rail and post 

deflections were 23.9 in. and 22.0 in., respectively. The 

working width of the system was 40.8 in. All occupant risk 

measures were within recommended limits, and the test 

vehicle showed no tendency for rollover. 

P/\SS 

Full Scale Crash Testing was done in compliance w ith MASH by t he following accredited crash test 

laboratory (cite the laboratory's accreditation statu s as not ed in th e crash test reports.): 
Version 9.1 (11/ 15) 

Page 4 of 4 

Laboratory Name: 

Laboratory Signature: 

Midwest Roadside Safety Facility 

Karla Lechtenberg 0 1gilc1T.y )igned by K.iHl.1 Lt:chtPnberg 

O~· rn.,KarJ11i lechtenbc-rg, o::: M1dwesl o~dsidc Safety ~cillly (MwRSF J. 

0.1. enwl!• po'ivk.l1@1 un l.tdJ. c~us 

0.-,1c.JOl60u11.;st.Ol ·OS'OO' 

Address: 

130 Whittier Research Center, 2200 Vine Street, 

Lincoln, NE 68583-0853 Sa me as Submitter IZJ 

Country: USA Same as Submitter IZJ 

Accreditation Certificate 

Number and Dates of current 

Accreditation period : 

A2LA Certificate Number: 2937.01, Valid to November 30, 201 7 

C,. '9'°'~11J'~rl ~l~'V 

S b ()'l ~naJC.tJ\1\tt,.,ltnb.-'9.-Md..,.\I 

llo1:hl ;jt ~lt1r, 0~ry IM.,., RSr), ov . s· . Karla 

u m1tter 1gnature: L b "'"'"• ~i.Q l-.'l. 1""' """·<•i.r.. ec1 .~ ~1~04 1 1 11 Ml• .o 'OO iten erg 

/ \TTA C'H MENTS 

Attach to this form: 

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

'.:! ) A copy of the f'ull tcst report, video, and a Tes! D<1l <1 Summary Sheet for each lest rn11cluctccl in 

suppurl or this request. 

1) A drawing or drawings of the dcvicc(s) that conform to the Task Force- I J Drawing Spec ifications 

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

11sually acceptable to illu strate the product, with detailed spC'cification s, intended use, and contact 

inlonnati on provided on th ~ reverse. Additional drawings ( 11 0 1 in TF- 13 rormat) showing details that 

arc rdevant to understanding the dimensions and pC' rformance of the dl!vice should also be submilled 

to fac il itate our review. 

Fl-IWA Offi ciJI Business Onil1.: 

Eligibility Letter AASHTO TF13 

Number Date Designator Key Words 
·' . . ,r"'~ -­;-~ .. 

0.000 sec 0. 162scc

Test Agency ................................. ................................... .................. ,\!wRSF 


Test Number ................................................................................. C..IWTC-2 


Date ........................ .......................... ............ ..... '1/30/ 12 


MASH Test Designation...... ................. ....... ........ .. ... 3-20 


Test Aniclc ................................................. Stiffness Trans1t1on between MGS 


and Thrie Beam Traasition wnh Curb 

Total Length ................................... . 87 5 ftC6 7 m) 

Height to Top of Rail ............................ . . .31 m (78 .., mm) 

Steel 12 gauge (2.66 mm) W-Beam Guardrail 

Segment Location - Single ............ . Post no I to !'pl ice 6n 

Segment Location - Nested ............................... Splice 617 to Pest no. <J 

Steel 10 gauge (3.42 mm) W-Beam to Thne Beam Transition 

Segment Location ... . .............. ...... .............. . ... . Post n('; 9 to I I 

Steel 12 gauge (2.66 mm) Thric Beam Guardrail 

Segment Location - Single.......... .. ...Post nos 11 to 14 ar.c I <l :o 21 

Segment Location - Nested ............ . . .................. Post nos 14 to 19 

Guardrail Posts 


Post Nos. 1-2 ........... ........ ..... 46 in. ( 1. 168 mm) loni.:. BCT t1 rnb~r posts 


Post Nos. 3-15 ................ 72 in. ( t .S:9 mm) long. W6x8 5 (W; 52x1 2.6) 


Post Nos. 16-18 ............... 84 in. (2.134 mm) long. W6xl5 (\\' 152"22.3) 


Post Nos. 19-21 .............. 29% in. (752 mm) long. W6x20 (Wl 5:x29.8) 


Post Spacing 

Post Nos. 1-8, 19-21 ........................ .................... 75 m (!.9fl5 mm) 

Post Nos. 8-12. 16- 19 ...................... . .................. 37y, m. r953 mm) 

Post Nos. 12-16 ...................................................... 18'!.m.r.:-6 mm) 

Soil Type ............................................................................ AASl ITO Grade B 


Vehicle 


Make and Model ................................................ ...... . . 20<"'- Kia Rio 


Test Inertial..................................... ................... . 2.410 lb ( i .Q93 kg) 


Gross Static ................................... .... ........... ... 2.575 lb r1.1 liS kg) 


Curb ............................ ................ .... ..... . . ....... 2.390 lb ( 1.0~4 kg) 


Impact Conditions 


Speed ........................ ................ .. .. .. ......61 3 mph (<l~ 7 kmih) 


Angle .......................................... ... .......... ....... .. :5.6 deg 


Impact Severity (IS) ........... 56.5 kip-ft (76 6 kJ) > 51 0 k1p-f: (..;9 I k.1) 


Impact Location ................ 11 V. m. ('.!86 mm) downstream ofpos: no. 7 


Exit Conditions 

Speed .......................................... . .. ........... .. .. 19.6 mph (31 5 km/h) 

Angle ............................. .............. ........... .......... ....... ... ... ...... . 1 l 0 deg 

Exit Box Criterion ..................................... ............. . . .. .. .......... Passed 


Vehicle Stability........................................ ............... ...... .. .... Satisfactory 


0.4 12 sec 0.558 sec 

\'ch,c!c uamacc 

0.772 sec 

I u ·-1· r•t - 1 

I 

......43.0 fi (1 3 I m) downstream of impact 

....... 3.8 n ( 1.2 m) laterally m fron t of system 

.. ................................ Moderate 

VOS -

CDC1

' 

........... . .............................. ........ 1 l-LFQ5 

. . ............................................... I l-LFEW2 

.\la,:1mu·1' Inte rior Dcfon:iat;<'r . ...... ......................... ........... Im (25 mm) 

Tes: J\'11c;c Damai.:r .......... ........................................... Moderate 

~i ax11:1u:1· Test :\r• 1c:c D·:Gcc:io~> 

P~rr1oncn t Sc· .... ................... ...... 16.1 in (409 mm ) 

............................ 164in.(417mm) 

\V"rking Wia··· . .. ..... ........ ............. ...... 32.5 in. (826 mm ) 

~ fa •;1mu:n Angular D;~(.1ccmcnt:: 

R0I: ........ .... .............. ......................... ...... -13. 7° < 75° 

?1:d1 ...... ....... ......................... . ... -8.6° < 75° 

Ya" ... . .... ........ ................................. ........ -70.7° 

Tran<<luCl'I Data 

Evah.:a:ion Criteria I Transducer MASH 

DTS DTS SLICE EDR-3 Limit 

I I ""i '"I ' -23.04 -24 21 540 OIV I ongnud111:11 -- ~ 

ft/s 16 i8) (-7.02) (-7.38) (122) 

{mis) I Lateral I :: 53 24. 14 21.1 9 540 

I 

I ((., ~7) (7.36) (6.46) (12 2\

Olv\ I L0112itud111 ~l I -15 65 -16.58 -1 172 < 20.49 

e's Lateral : 3 J5 12.45 10.88 < 20.49 

TH! V- f::s (mis) I 31 ')6 31.79 NA not 

(9 (.5) (9.69) reauired 

PHO-g's I :s 6~ 18.84 NA not 

rcau1rcd 

• not A~I I I · 1.40 1.27 rcau1rcd 

Figure 84. Summary of Test Results and Sequential Photographs. Test No. MWTC-2 

0 

,.. 

­

­
0.000 sec 0.013 scc 

Test Agency.................... ....................................... ........... MwRSF 


Test Number ....................... ........................ ......................... . ..... ... vl\VTC-3 


Date ........... .. ... ...... .......... ....... ...... ....... . . ...... ... .. .. . .... S/1611 3 


MASH Test Designation........................ . .. 3-21 


Test Article ...............................................Stiffness Transition bet""crn MGS 


and Thrie Beam Transition "1•h Curb 


Total Length ........ .............. ......... . Si 5 it fC.6. 7 m ) 

Height to Top of Rail .. .......................... . 31 in liS7 mm ) 

Steel 12 gauge (2.66 mm) W-Bcam Guard:a1I 

Segment Location - Single ....... . .Post 10. I to ~riicc 6/i 

Segment Location - Nested ........ ... .............. Splice 617 to !'ost no 9 

Steel 10 gauge (3.42 mm) W-Beam to Tune Beam Trans1ticn 

Segment Location ............ ..... .... Pos: r.0s. o to I l 

Steel 12 gauge (2.66 mm) Thrie Beam Guardrail 

Segment Location - Single.......... ...Post ll'lS. 11 to 14 amt 1ri to 21 

Segment Location - ·ested ...... .. ..... Post n0s I : to 19 

Guardrail Posts 


Post Nos. 1-2 ......................... 46 111 . (1 .168 mm) long. BCT t1mhc: posts 


Post Nos. 3-15 ................... 72 in. ( l .829 mm) long. \\'6x9 (\\' is::, 13.4) 


Post Nos. 16-18 ............... 84 in. (2.134 mm) long, W6x! S \\'i~2"22.3) 

Post Nos. 19-21 ............... 29Ya in (752 mm) long, W6x20 (W I 52:-.:29.8) 


Post Spacing 

Post Nos. 1-8, 19-21. ...............................................75 in (1.905 mm) 

Post Nos. 8-12, 16-19................... ............. . .... 3711: in ('l.53 mm) 

Post Nos. 12-16 ..................................................... !S'/. in. (476 mm) 

Soil Type .... ............................................ 


Vehicle 


Make and Model ............................ . 


Test Inertial ................................ .. 


Gross Static ................................. . 


Curb ................................................ . 


Impact Conditions 

Speed ............... ........................ 

Angle .......................... ............. 

..... A/ISHTO Grade B 

2006 Dodge Ram 1500 Quad Cab 


.... 4.969 lb (2.254 kg) 


............... . .. 5.135 lb C:.: 2.CI kg) 


..... 5.134 lb 12..32.9 kg) 


..61 0 mph (O~ i km/h) 

........ ........ : .: -! deg 

Impact Severity .. ....... ... 105.8 kip-ft (143.4 kJ) > 105 .6 k1p-fi 11~::. 2 kJ) 


Impact Location .................75in.11.905 mm) Upstream of Pl'~t No 9 


Exit Conditions 

Speed .... ... . ............. ..................... . ...... . . .. 38.3 mph((,; 7 km/h) 

Angle .. .... .................................... .. . ......... ......... 11 7 deg 

Exit Box Criterion .......... ..... ... ..... . ..... . ... ... ... ..... . . .. Passed 


0.035 sec 0.096 sec 0.292 sec -------101· {!08 ,..!_______, 

Figure 93 . Summary of Test Results and Sequential Photographs. Test No. MWTC-3 

Vch1ck S1ab1lity 

\'ch1cle <;!C'ppmg Disw·cc 

Vch1dc !)amag.c. 

vns · CDC'' 


Mn,11min- lntcno: Dc"r,· 1l<lliu:1 


Tc~· \-;1ci~ Dama~c 

~!a\!:·11:111 Test Art1d~ IJ~ :~cct:0:·s 

Pcn:1ancnt Set 

D) namic . 

W0~k111g \\'1d·i· 

Max11nua1 Angular D·s1~i<?cen1cnts 

Roi! ........ . 

Ptt~h . ... 

r~ <duccr Data 

..... Satisfactorv 

IOI fl (30 8 m) d0\\11Stream of 1mpa;t 

. 6.4 fl (2.0 m) lateral!~ behind system 

.. ....... .............. .. . ....... Moderate 

............................. . ..... 11 -LFQ4 

.................. .. ... ....... 1l-LFEW2 

............................. 2\1,m (64mm) 

.. .... . .......... ... ......... ..... :vloderatc 

.... ... ............................ 17.8 in (452 mm) 


.. .... ........................ .......... 23 9 in. (607 mm\ 


....................... ao.s m. (1.036 mm) 


................................................ -21 .s• < 15° 


.. .............................................-10.s• < 75° 


......... .. ........................................... 55.4° 


E,·:::1ua110n Cntcna I 

I DTS 

T:ansducer 

DTS SLICE DTS 

MASH 

Limit 

OIV 

ft's 

(mis) 

I I.ong.1tud i11~I 

I Lateral ' I 

-I 7 62 

(-5 3i\ 

I~ 31 

..J.97) 

I -1 7.46 

(-5.32) 

17.79 

(5 42) 

-18 77 

(-5.72) 

17 11 

(5.22) 

S40 

(12.2\ 

S40 

(12 2) 

ORA I Lom!lludmal ' - 12.52 -12.29 -1 307 s 20.49 e·s I Lateral I 1n ?J 9.18 10. 12 < 20 49 

Tl!IV- f; ·s (m/s) ! - -> ... """" .,_ 

(7 "2) 

23.75 

(7.24) NA not 

reou1rcd 

!'HD-g's i l' ":'I 14.83 NA not 

rcolllrcd 

A:- I I 0 SS I 

I 0.93 0.92 not 

required 

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BEGIN STIFFENED Tf-'RIE BEGIN SGR20o-b 

BEAM BRIDGE RAIL OR EQUIVALENT 

~-- ~-------- ----~325 "3/ 6" [8 75 )------------- ~~-~ 137 . /2"(953 ) 1----75"("905)- - --l 

16D DOUBLE 

HEADED NAIL 

F880 6 FOR c OR 

12-FB801 F2B0 7 -0~ b Optional Post 

2- RTM 1Oo DOUBLE 

(2-PLY 

I I 

I I I I I I 

I I I I 

I I 

I I I I I I 

NESTED) RTM09c 8-F53C' 2 - RWM04o DOU BLE 

(2-PLY NESTED) 3. "( 788 ) r A 

I I 


Curb I I 


Ground 

Line 
INTENDED USE 

Nested Midwest Guardrail System (MGS) W-beam to Thrie Beam Transit ion with Curb is intended to be used when the MGS is placed 

adjacent to a stiffened thJie beam approach guiirdrail transiti on to a stiff bridge rail with a 4" [I 02] curb. The Nested MGS W-bcam to 

Tllfic Beam Transition with Curb without the optional post upstream of the Asymmetrical W-bcam to Thrie Deam Transit ion (RWT02) 

should be used in locations where a ma ximum dynamic deflection of 32.5" [826] or less is acceptable and where a working width of40.8'' 

[l,306) is provided. Nested MGS W-beam to Thrie Beam Transit ion with Curb with tbc optional post upstream of the Asymmetrical Wbeam to Thric Beam Transition (RWT02) may be used in locati ons where safety benefi ts of reduced vehicle pocketing and snag and 

system d ynamic defl ections of 27" [686) or less is desired. The Nested MGS W-beam to Thrie Beam Transition with Curb may be used 

with or without soil backfill and should be installed with a minimum of24" [6 10) of level or gently-sloped fill placed behind the posts. 

The Nested MGS W-bcam lo ThJi e 13cam Transition with Curb should be used with the following guidelines: 

I. A mi nimum barrier length installed upstream of the nested W-beam (RWM04a) should be the total system length of an acceptable 

Test Level (TL-3) guardrail end terminal. The guardrail end terminal's interior end (stroke length) should not intrude into the 

nested W-beam (RWM04a). 

2. /\ mi nimum ba1Ticr length of 4 12.5" 110,478] should be installed beyond the upstream end of the nested W-beam (RWM04a), 

which includes standard MGS, ;1 rrashll'orthy g1 wrdrail end ll:rminal, and an accept ab le anchorage system. 

3. For flared guardrail applications, a minimum b:micr length of 150" [38 10) should be used between the upstream end of the nested 

\\I-beam (RWMO<la) ancl thi: stall oftht• lla1ccl section (i.e., bL·ncl b..:twcen llan; and tangen t sect ion~). 

T hr N:.:sted MGS \\'-beam lo 'f hric lkam Tran,ition with Curh has l1C'cn rn h tested under TL-3 rnndition' of' the: f\l1111u:tl for A'sessing 

Saf..:ty l hnclwarr (MASI I) and th.:~. ml'll accc p«1bk acccndi11g to the. MASH safely pcrfo1mancc crit eria. 

COMPONENTS 

Unit Length=325 13/16" [8275) ____ __ _ _____ 

DES I GNATOI~ 

RWM04a 

PD818 

RTMIOa 

RTM09a 

PWE06 

PDBIOa 

R\VT02 

FDl306 

FB IJ07 

FBBO J 

PDBl l 

PDB21 

PDE02 

COMPO NENT 

Stiffi.:nccl Thric Ht'am 13ridgc Rai l System 

4-Sparc \\l-13ram Guardrail 

6x l 2x 19" It 52x305x483) SY!' Ulockout 

12 '-6" [38 1 OJ Thrie Beam, Quarter Post Spacing 

6'-3" 11 905] T hri c Beam, Quarter Post Spacing 

\V6x8.5 72" [I 829) l'osls 

6x I 2x 14.25'' II 52 x305x362] SYI' Ulockoul 

Asymmetrical \\' lo Thric Beam Transition 

14" [356) GuHdrai l Bolt and Recessed Nut 

21" 1:156) Ciua1drail Bolt and Rccr s~<·d Nut 

16[) Double 1lcad..:d Nail 

1.5" 138) Guardrai l llolt and Recessed N ut 

6x l 2x l 4.5" [1 52x305x368) SY P 131ockout 

6x l 2x 19" [J52x305x483) SYJ> Blockout 

6x8" [I 52x203] 72" [1829] Wood Post 

E LIGIBILITY 

Fl-IWA eligibility will be pursued . 

QlJ,.\ NTITY SYSTEM 

I 

2 

6 

2 

I 

9 

3 

I 

14 

14 

4 

40 

3 

6 

9 

a-b 

a-b 

a-b 

ah 

a-b 

h 

a-b 

a-b 

b 

b 

b 

NESTED MGS W-BEAM TO THRIE BEAM TRANSITION WITH CURB 

4.-"'. ' '•~I 

STG04a-b 

SHEET NO. DATE: 

2 of4 1/812015 
Ground - Tine 

cj ::::::. -:.::::::..-:.:::::::::::: ~ 

-r·'1"f 102 ] 

_­ l':'"~ L 1"[1l _l___ 

I 

SECTION A- A 

NESTED MGS W-BEAM TO THRIE BEAM TRANSITION WITH CURB 

STG04a-b 

SHEET NO. DATE: 

3 of4 1/8/2015 
REFERENCES 

Winkelbauer, B.J., Putjentcr, J.G., Rosenbaugh, S.K., Lechtcnberg, K.J\., Bielcnberg, R.W., Faller, R.K., and Reid, J.D., Dynamic 

Evnl11alio11 o.fMGS Stiffness 7i·a11sitio11 with Curb, Final Report to Midwest States Pooled Fund, Transportation Research Report 

No. TRP-03-291-14, Project No. TPF-5( 193) Supplement #58 and 63, Mid west Roadside Safety Facility, University of NebraskaLincoln, Lincoln, NE. June 30, 2014. 

CONTACT JNFORMATJON 

Midwest Roadside Safety Facility 

Nebraska Tra nsportation Center 

University of Nebraska-Lincol n 

130 Whi ttier Research Center 

2200 Vi ne Street 

Lincoln, NE 685 83-0851 

(402) '172-0965 

Email: mwrsf(f1)unl.r d11 

Website: http ://111wr f'. t111l.edu / 

NESTED MGS W-BEAM TO THRJE BEAM TRANSITION WITH CURB 

STG04a-b 

SHEET NO. DATE: 

4 of4 1/8/2015