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257578 ORIGINAL TO CITY CL6RK �,� . CITY OF ST. PAUL F,OENCIL NO ' OFFICE OF THE CITY CLERK • ES TION—GENERAL FORM PR�ENTED BY Roger M. Conway _ February 28, 1972 COMMISSIONE AT� WHEREAS, In connection with the instaliation of an Impact Attenuator at EAST MJARYLAND AVENUE at BURLINGTON NORTHERN �AILROAD Tracks East of Johnson Parkway, this work will be done by City Forces at an estimated cost of $4,000.00 pius Engineering and Inspection, $560.00 and Traffic Bureau, $440.00 or a total estimated cost of $5,000.00, therefore be it RE50LVED, That the estimated cost of $5�000.00 be charged to the P. I.R. fund, Code 6000 and this fu�d to be reimbursed from Public Works Project Contingency Fund. T-1o53 s,,, ^p O�E �'LjSaV�i ,�ion Counset � S r �� MAR 1 1972 ' COUNCILMEN Adopted by the Counci� 19— Yeas Nays �-- �_ MAR 6197Z ~ve � 19� �'��-�.-c �'^ Levine � Tn Favor Meredith Sprafka yor �� A gainat " �e�teseo- ' Mr. President, McCarty PUBUSH�D M 1 1 �g �, �� . � 1 - - ....: . . . . - , . ,�. . - .. . i ___ r_ .. �. > , _- . � ', . �-. � . � - �`� .. . � . , , . . ;:: . t - - - ' _. � _ . :-.- � ye.�r..� '-..._ �...-.,�_ •- - .,,�,p� T � a ,: ' - �y p� T � - �� . y� -,. . . a� .... °"-"7rl��i��M"'��:��I�iN..:)[L��Y rsR� , a � . . . - �s .. . _ _ � �.r�� . � ,. ' �, _..�� T . . , �v a+ 'RE: . P � os+ed .rn�act Attsnuato� o� Maryland �ve. at Lhe But2 ington-liortficrn Ra ir `� � � ' :..� - �.��,SoP�cit iiA�.�etw�,,,i�hwson R:a�3c_ a�d_ Gla�te�c� .�. !'�i�.y .��t 1b,. �"�� : LOC� - . - < '_ . . � ° � � '�r � .;,_ :� _ . � � � � .�„, _ � �__ Jiafyland�t�ve. fs t�.c �r,.q cor,lnuous-ea�t-west' trafftt fatii'it�►�egTi�t�t��js�'"` �=_ �, t�ie ��ar east side an� cc�nnec�;.:; to �orio Rve. in the midway erea of St. Paal . This allgnment does have grade �separations at the ra+ iroad traeks and does brielge over �� `-��: '�;,is roatl:tiay preser�`3y"car�fies tr*a'ffic �-olunte� a�p}srci�ch'ing �O;04ff`vi�iti�lS'"'�'`"'� = ' per �ay ort four substantiarq i0 rt. and 11 ft. wide traffic lanes. - � ' � - The raferenced gra�e separatio� bridge was �onstructed with a pier ioCS�e� it��'"`+� -' the cente: of „ar�rtand Av�. ��e roadway on Maryiar►d Ave. has •n absolute minimu�+ width, ar,d the center p;er does im�ose an additional dangerous situation. Three accidents in whicl� vehic{es struck ttte pie- in tt�e last thr.ee yaars h�ve ��suitsd in two serious personai injuries and une fatality. rESi�N R�PpP.T Thc: impact atte�uator �ev;ce �ve �have sci�.tca consisLS oj a eiuster of 44 hollo��+ V:ily; �ic35�IG G%� iC�u�:iS � �d'.'f'1�" °:lc:i' ��IIGK i'::�ti5 � @ilif a n4r.ttn3i GIitSI�iC diameter pi s �x inch.s. The eeiis a]f'C �;��n �� i � 1cd wi �h a s�;lution containiny 3� pounds of eal- G +��R�� .�li'�r+C�C �t.i' �u7lOF1 Gf ��ti�:�' . ':�.`t� GO�iU�'�1 O� L�1C Cei �S are Cf05�� WiLfl ifle LOA C1�2 GO;�Lui��f1C� OritlG'�S t0 r@�� 1dtC: �i�� t"i:��c35e Or ��ater. pl vinyt cap atiached LO the tu� prevents cva�oration an� ca�ta��ination of the water in the cell . As tne ce� i wai � de`�ects ;r,warr:, ihe intcrnal voiume ciecreases � ca�sing a pr-r_ssure i�crease i;�side :��.: ��rai1 . Ti�e rate of pressure increase ahd the maximum ii5t�rnat a�essure are cor„rot t ed ��s �he or i F ices ir. the insert at tF�e top oF the ceii . St is this pressu�e which mitiga:es the crash by dissipiting the kinetic er+e�gy at c�ntrci ic� raies. . T~.� d�::s i,� ;ust: f i ca*_ion `cr t;; �� c-c:�i c� i s based on i ts ada�tab i 1 i ty to prevcn: e.-�c�oachr.;�,�t tnto tk�e Gc� i�aa;ed t��` ic .ianes . Tnis device appears to be designed su�:=, �.:�--, ��o solid debris wi11 be ;crt on the rfladway aft@r either a hcad-on or a s i �e �;�,;e im�aet. ?�:e City �as ~�an;r s �r.;i i�r r��;:arrous iccat :on; that should aiso be protected. ;yi -c�r„e, n�e are desirous o` insta� i i�,� tnis �ev'rce to give socne individuai exper- ienc� to aid in the determina:ion of particuiar conditio�s of use� as weii as a perTOr�:,ncc ��alu�tion. � , _ . ; � ,_ . '� -'� �� ;�:'�+`�.� �. � , � � 3 '+Y , tMx"� � ' �. '� p�JI 4f� S'�.. �5�.�� '<r� ,� �'�S . �Y." ''s.` � .��' 3 b'ry ...� .� '��x r � _ � `� � ��x j �� '�z ,.� �.��-. �r �� =.ie ,< � „"' � ,, �''�....:1 ' . ,�,� � � z y �� 1,� . �`'�:��,,, � ,, - �"'^,� < .� . ._. .�� . ;. � . �. , .., --� *''�' � , � � - :�,'+,�"�"3+.,..-: ` ��"s,.xr" ,;� � ��.-.,. � �� `�.r ' �� -�"� '��,,�=. . .m. ,axr->.� -,_.�.. -_a..�.... ,. , ... . �, ...« _,��_.:.,;;�r.c_�rc.. • � ... � — ai �.„�x°� � •� t� �� *►�,ro, � -. , , � � � - � _ . _ � �, ��w �: ;� /�I� �. ■ TWO hi-d�o cell insfoliotions on the ��"'�'"""�"""" Van Wyck E:pressway reveal before and ''" � �� I •her appearances. Clusfer in upper photo "i I _� is undisturbed. The other group has been ��,; '�� • strutk and � �"'��f��* pushed out of position by a car that quickly sped oway from the site. ,,� �y� �y,� ��.; _ �. ,,�-. .r�'�;. ,�*�, �r �,,a � ,. . -�' ''�r s., .z �»n.. < ...._ . . - �9. �:�' . �,>' i.. : _: ,.�.. ., ,. ... , a, ... �L�'.. ... ;�3ise.t . �'`,� _ �'�;. SOL GALLER cushioning, of the impact force, eas- in�. One tube w�as torn and another Assistant Engineer in Cho►ge, ing the deceleration of and lessening «-as pierced. Arterial Highways and the damage to the vehicle and its Perhaps the most significan� e�-i- Structure Maintenonce Division, occupants. dence of tne value of the protecti�•e Deparrment oF Nighways Each of the installations consists devices is that none of the accidents _ New York, New York of approximately 60 tubes fastened resu�tetl in a disabled car being left �ogether to provide some unity, with at the scene. Nor hace the police �WO CRITICAL gore situations the s�>stem attached to a rigid back- been notified of an�� personal in- on New York City's �'an Wyck up plate. The assemblies extend juries. In fact, the errant cars have Expressway ha��e been equipped from 6 to 8 feet in front of the gore been driven away� from the scene with imPact-absorbing devices apexes and occupy some little space promptly and quietly. There is little known as hi-dro cushions. These in the roadway. As a result the� doubt that the hi-dro cell sy�stems energy-absorbing systems cor,sist of probabiy are struck f:om time to ha�•e perEormed as intended. Tw�o clusters of poly-vinyl plastic cells 6 time by vehicles that might other- more �*ore installations ��ill be made inches in diameter and 40 inches wise maneuver clear of the gore in the near future. high filled with water containing nose. This circumstance, howe��er, is All told, the celis appear to per- calcium chloride to prevent freezing far outweighed by the protection form �.��ell. Maintenance prob]e.ms at ambient temperatures. (Specifica- that�s offered to drivers who attempt have been minimal. It does appeaz tions require protection to —20°F.) too late to recover from an error. that cell units may have to be re- They have been placed at gores on Maintenance of the ce1Ls was as- placeci periodically, but that is no viaduct sections of the expressway signed to a highway patrol team that great problem. The plastic w•a1Ls of where elimination or substantial routinely covers arterial highways the tu''�es have a lo��• tensile strength modification of the structures is not in Queens County. To date, their and a tendency to deform when feasible.The protective devices fune- principal effort has been to refill the struck. Tne fact remains, however, tion by spurting the contained solu- tubes from time to time, indeed that the impact absorption devices tion, which is naturally incompres- somewhat frequently. In the first do iunction as plan.ned. T:-iey are sible, out through small orifices in month the installations were struck prot�uve devices that shoiild re- the cell tops when struck by ve- six times, but with little damage. duce injuries and save lives at points hicles. The result is a deadening, or Once a cluster required straighten- of oo�•ious danger. ��❑ PLTBLIC VE'ORKS for May, 1970 Rl . -� - � �. _�' _ "r �;;� � ��`'-��_'� i ;E �r ..„� , �,,, +�� '�� k�. � ;� � .�' -,. -� � -1F»�y **4 i' '�r'Y�... �g �. � � �� _ -:, ,. �� ,� "�`. �.� ;,p»;�. � 8 �`' ��; v L•...r.J. � ' ��. � .. ' � � . ,.._. ,. �...:. ��' � � � A � *�u � � :� ;��;'.� _ 'r„t�,,�„' , - ��}�� 6 '�4� ,�.rL.IY.�K�i'I �':.�,i :�� • � �� ..�r^' , ,v�'a� . �.� ...� eitN. Y' Y �� « .�'&` �P�.��.i`.� . . ._<. � ;.<.erv +�,.._..aro -..'sr�... .w . .., ,,, ..,,. •dws 1 .v ..G;-�iY�r'.,1R> • � .. � — - « i k<a� ��, .�1 .;''.;,;:. a. �� — i °?�.�:�"�fr / � - � �� .'*.�"`�.�� ■ TWO hi-dro cell installations on the � �"�'�"� "` �.°':~ �:`.... Van Wyck Expressway �eveal before and �fter appeorances. Cluster in upper photo "L � i is undisturbed. The other group has been -� �,,� � �°� � � struck and pushed out of position by a x : cor thot quickly sped away from the site. .? �� b s> �; �"s. �'�«„ ,-r. .,�� .�... , �'.. �. «_.. _. '� S : . - �-:< �,��' " ° '§��. _ � w .. ._... �i�'i +r�-. -. ,'�� SOL GALLER cushioning, of the impact force, eas- ing: One tube w�as torn and another Assistant Engineer in Charge, ing ±l:e deceleration of and lessening «•as pierced. Arterial Highways and the damage to the vehicle and i�s Perhaps the most significant e��i- Strucrure Mainfenance Division, occupants. dence of tne ��alue oi the Drotecti�•e Department of Hig6ways Each of the installations consists devices is that none of the accidents New York, New York of approximately 60 tubes fastened resuited in a disabled car being left together to provide some uruty, with at the scene. Nor have the police TWO CRITICAL gore situations the s��stem attached to a rigid back- been notified of an�� personal in- on New York City's �'an Wyck up plate. The assemblies extend juries. In fact, the errant cazs have : Expressway have been equipped from 6 to 8 feet in front of the gore been driven away- from t.he scene with imract-absorbing devices apexes and occupy some little space prom�tly and quietly. There is little known as hi-dro cushions. These in the roadway. As a result the� doubt that the hi-dro cell systems energy-absorbing systems cor,�ist of probabiy are struck f:om time to have performed as intended. Tu�o clusters of poly-vinyl plastic cells 6 time by vehicles that might other- more gore installations will be made inches in diameter and 40 inches wise maneuver clear of the gore in the aear future. high filled with water containing nose. This circumstance, how�e�•er, is All told, the celis appear to per- calcium chloride to prevent freezing far outweighed by the protection form �n�ell. Maintenance problems at ambient temperatures. (Specifica- that�� offered to drivers who attempt have been minimal. It does appeaz tions require protection to —20°F.) too late to recover from an error. that cell units may have to be re- They have been placed at gores on Maintenance of the ce1Ls was as- placed periadically, but that is no viaduct sections of the expressway signed to a hi�hway patrol team that great problem. The plastic �•a1Ls of where elimination or substantial routinely covers arterial highways the tubes have a lo�� tensile suength modification of the structures is not in Qseens County. To date, their and a ?endency to cieform when feasible.The protective devices fune- principal effort has been to refill the struck. Tne fac�t remains, however, tion by spurting the contained solu- tubes from time to time, indeed that the impact absorption devices tion, which is naturally incompres- somewhat frequently. In the first do iunction as planned. They are sible, out through small orifices in month the installations were struck prot��ve devices that sho�.ild re- the cell tops when struck by ve- six times, but with little damage. duce injuries and save lives at points hicles. The result is a deadening, or Once a cluster required straighten- of ob�•ious danger. �0❑ PUBLIC V�'ORKS for May, 1970 Kl . . ' _THE NEW YORR TIMES, WEDNESDAY A►DVEMBER 12, 1969 City Testing Water-Filled Hi hwa Buffers ' � . ... . . �.� �� y �.. �N �'Y/3"S Clustered C linders �`y�. � � a �` ��t A��"��"`�� Yi� �°�'o��y�,�� ,r i' h k �`a � y�z ' , � " °',��'OO��,.s��.�o.. � . � . Set Up in Queens t .., .. ��,a, �: >. ,. Cushion Impact p� _ ;.;�.��>,..>,. . „ : v. �.. .. ; � _.... By Enw,�an t�rosox ;>�,�, _ The city's Highway De- ,„��' � I `l �� _ partment has begun to test water-filled 'buffers" on o�.,. 3 I lieavily traveled roadways in ` �'�F 4 �h .' • �a� an effort to reduce accident !:,� �� ;��;� - �. u in�uries. �` �� s� The buffers, or bumpers, •� `� � Tz��' ;.. • are clusters ot plastic cylin- ;; ! ,� ;�„ ,. ders. Thcy have been in- a � ��• � stalled in front M concrete � '�``° roadway dividers on two ° , ,u'�� '�`^�` main Queens arteries. '�"°"'3`�";�'> �`� '. • ;:;��;�°�:�,., �;:.;: When struck b a vehicle '�``""::•.::;�;�r�,"< :` ; y � .;;�.;.n.g;�.��E::, a:�:..,-k`.� ��+,,`:' � � the buffers cushion the blow ��. �� s��'' , , by releasing a apray of wa- �, ter from the top� of the cy- >::3 V linders. There ue about 50 .:<_�. , cylinders to one bufter. Each cylinder is about three feet � tall and six inches thick. ; �1@ installations were -�.N�,,,v��r�m��bY e:no�sn,,.�a„� made last week. Water-ftlled cyllnders form bufter at exit from Van Wyck Expressway to Northern Boule- One buffer was installed vard ln Flus in front oi a barrier dividing �S• ahen struck by a vehicle,devlces cushion the blow by releasing water. the east and westbound ' eaits to Northern Boulevard trom the northbound road- way of the Van Wyck Ex- pres�way fn Flushing. The test is the city's tirst The aecond was made on evaluation of the safety Alorthern Boulevard on ' devices. Ho�vever, similar eutbound traffic to the safety humpers have also Whitestone Expressway and been installed in several key the Bronx-Whitestone Bridge locations by the Port of lrom southbound traffic to New York Authority, accord- the Van Wyck Expressway �ng to a spokesman for the and Kennedy International bistate agency. These include ��rt the George Washington More Bu![ers Due � Bridge and the Lincoln Tun- nel. "Motorists who change ; The buffers have been also directions on the boulevard ' used in other cities and have at the last minute, and too produced "good advance re- late to avoid striking the ports" on their effectiveness, barrier divider, will bs the Transportation Admini- showered with water instead strator said. of broken glass and pieces of The cylinders are filled metal,"Constantine Sidamon- with a mixture of water and ' F.rlstolf, Transportation Ad- calcium chloride to prevent ; lninistrator, aaid in announa freezing in cold weather. The � ina the test. buffers operate on the same � Mr. Sidamon-Eristoff said basic principle as the water- that similar buffers would , filled bumpers that are car- soon be placed on the West' ried b�� some ta�cicabs in the Side Highway and the Frank- �ty to reduce damage to caba lia D.Roosevelt Drive as part and injuries to occupants. ot the six-month eaperimenk -- --- ,. � y„ , . ;� . . �'s , � ' . . PHOVE fi51 2195' Ey,�. f ` . � � ;� ti o n � C� . �� C� r � r � � � , , � , . . � , � ' '' :;�Ce��ibF� :' , , 19iO ^ • � I � � � � �, � � � � � � �� t # Mr. Wan `.,ePgmiller, P.E. , 1 ` V i ce Pre�. i cjent `�. _ � � Eneryy �hsorption Systerr�s �]`• Fr�e nr i ve � . S�cra�nento. C�liforr�ia 95815 , ' � _ Qear Wan: • As you know, tMe Oregon State Nighway Division has developed • � special accident report form for impact attenuators. AttachlA �' are copies of the reports on the first accident involving a H1• � � dro Cell and thP first accident involving a Fitch barrel . I < < ; think yo�u will find the repair cost very interesting. ; � '' � � LABOR E�UIPMENT MATERIALS TO_ � : . — Hi-dre Cell 81.00 25.00 - 0 - 106.00 Fitch aarrel 135.46 28.�� 1 ,113.75 1+278•00 `�ince these first two accidents the Highway Departn�►t has � � experienced two more accidents with the Hi-dro Cells and one : �dditional accident with the Fitch barrE�is . As soon as these 4 accident reports are available, I� will fo►�ward then► to you. � 7o date there has be�n no accidents involving the ta�o Texas ; barrel installati�ns �n �reqon, but they have been clipDed � several times. _ ,, ;; Sincerely, � _ , , - r . • �/ � 1 ' � DOUi71�5 ''. _�d��lt'��. , P.E. . . � � Ch1Pf � n;�' ��f'F"" QD/sh cc Coral - Gla�istone � Enclosures OF� 2 9 . P, , . � : . � q ► ♦. � � ��, I /��jy// i / . �J � •'\V�•: N'� h . . '' Y:. � r�w� . � �it L. �...CeorPe `� . ,�---�'- , � . �..�. N. gaL� , . � oj�a � � :_ .: , � • I» �. •Rulien � � . . ' ��; �, ;. � �1. J. Gix�/ ENERGY ABSORPTION. BARRIER , •�.� . • ` , , e'� ACC I DEN1' REPORT • � DISTRIfT 2rB C[TY POHTLAt�D PFIONE 654-?741,ext.�69 . REPORT OF ACC I DENT _ 1LOhn W� Shelrtrake DATE 9-28-70 Dr1TE OF ACC I DE�T 9-21-7Q HOUR 1Os30 or 11:W FK � TYPE OF BARRI ER - o Cushion LENGTH u' 3" ' �� LOCAT ION OF BARR I ER Columbia Hivor Fiwy� I-80 N. • $R !/2 �p 2C0_,_,_, � WEATH&R COVDITION , LIGHT CONDITION � • . ��?;,� � ( ) C L EAR ( ) DAWN '� �. � ,,,.. � (x) ��IET (not rAining) • ( ) DAYLIGHT AAknw�or�+G� ... — -- • ( ) RAINING . ± ( ) S�'OWING � ) DUSK : � " � (x) DARK (lighted) �s'S � �A h , ��' of � � ( ) ICE , ( ) DARK (not lighted) � Dra� Roadwa , �arrier ' � • ( � FOG � ) � t 1 `� . . . . , TNJUItIL'S: ( ) NO ( ) YES No. �� DIiATIIS: ( ) NO ( ) Y�S No. ' � DESCRIBL INJURI�S: Vehicle s�parently loft tho aceno ur�der iLs own po�sr. � � ' —° �. . A SEAT BELTS USED: ( ) NO ( ) YES VEHICLE SFEED (Approx.) �++n � _.._ � ;�`: • VEt1ICLE DAi�1AG�: (x) SLIGHT ( ) MODERATE ( ) SEVERB VEHICL�, �o*m � ' ` � � Type/Make DESCR I BE DAIHAGE: ��o�- gaaed on lack of wreckaae at the�cene.(o�e or t� trs�nents of__ '• �what appeared to be parking lemp lensee), damage could not have M. � ! In icate.• Dama e Area�-� ' ` , , hC.Ei1�-nre than "eliaJ�t'� � 8 ' . , � '� . R : . ji N . M . � • R � � � O • +�. ` " � �'(P�OBABIE)L a . • ANGLE GF IMPACT. � - 1� ° - � � ' YENICLE REACTION: ( ) HOOKED ( ) REBOUNDED ( ) ENTRAPPED ( ) �� `` ;; , -, BARRIER DAMaCE: (x) SLIGHT ( ) MODERATE ( } SEYERE . • - �DESCRIBE DAMAGE• No atructural demage. First 3 cell sectlon• v�csted so1��Li,oc►. ; -. n icate amage Area Collapsed in etra�i�ht line. 3� R � REACT I ON: ".` . • w . -- a • o v . w L a REPAIR COST: . �. . . ' pERSONNEL COST.�._�EQUIP�ENT COST �z5•� biATE�IAL COST Incidenta�pTAL � •� '. REPAIR TIME: MAN HOURS � 1 EQUIPMEtiT HO'1RS 8 . ,; ; . � , REMARKS:�, Intormat ion on car involvad�not av�ilable trom P.P.D.�no data ae car apparenL� le!'� " scene under ite atim po � • . . . . � s . • � � SlGNING ENGIN�ER ' � • ke� t� tio» • �_._ ,.. - -- ------�--�.._•-.-----��--- �---.,_...... � �•�• , ' ' .c � ' ,, � �. �.. .. �•";'� ' �, � rr eot ' • � � copy to: R: . . . � , '� . r . � � !. �-'�' . ° � ,w : ' � �NERGY A`�5�`i;P"rI�N BARRIER R' bucr*. , . J. � i°:. - ' • ACCIDr.!�T REPQRT . , , .'• . . e t• ��,.. . . ' . . 'y :. . � ,, . .� OISTR ICT _� � C t t'Y�_ �ale� �PHONE ' �. ° � � REPORT OF ACC1uf:NT_�__ � n�".aid R. ��::a.�� DATE 10-18-70 • � 1970 NOUR 4:00 A.M DATE OF ACCIDENT Fit �1h Tnea� ial Barrier [,ENGTH 2�'6" • • � , ' TYPE OF BARkI ER __.. --—�.__,^ ' • '' LOCATIOA OF BARRIER�'_�c�,fic H,1,9hway (I-5) & �s�mr.:�er ial StSR i-_S b1P; 5 .'�8 � � . . • . ; �� NE1lTHER COhDITION LIGHT CONDITION ; .'.;� � � , �c�s �' �� ( CLEAR ( ) DAWN � ' • ' - - 4.�.. 4 � �` � NET (not rninin�) ( ) DAYLIGHT �� ,:� � : �° � ''� ( RAININC �� ( ) DUSK � d�• s ��' . . • • • - � : t , � SNOIYING � ( ) DARK (iighted) � � � �• � � ICB (X) DARK (not lighted) � S rsN Roadwa , tarrier . ` � .( •) FpC ( ) �t i t . � .., . ' . . .�. ,, ; , ► �: r' , _ t �; :. ; INJURI ES: (X) NO ( ) YES No . ______ DEATFIS: ( � NO ( ) YE! 1to. -� ' � DESCRIBE INJURIES: Vehicle left the scene under its owrt power a��iclwo_trin9,_� � r ' � fender pressinq on tire. _ _ � , SEAT BBLTS USED: (x) NO O YES YEHICLE SPEED �(Approx'.�, �� • ! k. � ; YEHICLE DA�tAGE: (?� SLIGHT O MODERATE O SEVERE YEHICLE s ��.�.--' � i►' � . '�'YPe�a . '•` :-� DfSCRIBE DA.�IACE: pamaqed left . front fender ; bum�er: � -- � side panel. f � �'� Estimated reeair cos�„�5128 � n cate,' t�e Area r, �..�._ t � �. �' . �+ • � . ' ' � o • : �, ' • a • L � � , . � �� /1i�tGL� 'OF IMPACT � � - 2 • . . , _ - . 1 VEHI�LE REACTION: ( ) HOOKF.D ( } REBOUNDED ( ) ENTRAPPED ( )_,Qr,$,ve throuvr � BARRYER DMIAGE: ( ) SLIGHT (X) DiODEEUITE ( ) SEVERB . , � DESCRIBE DADIAGE•�Destroyed first 4 berrels ,_scrapped �urth barrel �d • � �� .� � � ` • • • � broke open �fifth and sixth barrels. � .� . � ..:�._. ._.� a cate a�� rea � , REACTIONs �rrels sh�t;�red ar.d �pll �ver a � � • � � array from t_h.e..r�= - --• ~ . 11 1 '�° ';. 3 r.' � �I, �, � f p4 � REPA�R COST: • �, pERS NNEL COST��5�QL11P�tENT COST��4'.NaTERIr1L COSt� 1_1 '�.?S TOTAL 51,.27A.�0._ . ' REPAIR TIAIE: 1►IAN HOURS�,�4.__ £QUIP�iE�T tiG�R:.� � 16 � . ... ti , . „ ..� . � , . . .- . � REMt1RK5:. Driver. may hdve do�ed en�� thcr� tripd nvo�,d i�act �� ,�,,.,��.� ' �� limitina th� s e o£ SAnd. !-n h re �r and ' ' �� _ .� �� .t..��. �.s_S�L+--.—��- -- �: behind. ' ' ' .; . -. ;, L:NE:t sll�(1:-15-70 . • • , •:�. ' , ( , ,� • �• . . � ... � . . i�l� ' � •+ .. . . • • •',r ., - 4l * , • Il�ACT ATT�`TJATIO�i DE7I�B ' ACCID:..'��' IYSP?.CTIOid Rr",PO�T CO�..CTICJT ST4T:. FsU?t�aTJ OF :-iIiY�TAYS - OF.yIC� OF TPA.�'FIC l. Lxation: I-95 Westbound @ Roadway to Relocated Route 7 Northbound, bdt 15, Noz-walk 2. Description of Site: Right hand ead.t a,t structure. ��].]. lane drop. 3. 1�rpe of �evics: 1�ydro-Cell 8 Bay 1�. Date of Installation: 7�70 5. A.�.T. 69,�+00 (1969) 6. Posted Speed: 5o m.p.h. ?. Average Speed 55 m.p.h. 8. Esti�rated Vehicle Spesd Prior to Impact: 30 - 35 m.p.h. 9. Date o: Irapact: 2/5/71 lo. Ti.-ne: 6- 9:00 A.M. 11. RoadWa�y Conditioa: Snaw, Glare, ice 12. ?dumber of Passen;ers In 7ehicle: Not known 13. Passen3ers xearing ssat belts: Not known 11t. I��uy to Driver: None pres�ed 15. Ir�j u-y to Passsn3ers: None pres�ed 16. AnP2e of Impact: Hea,d-on 17. 7ehicle Year, '^ake and Kodsl: Passenger size 18. Description of oehicle Damage:• Not knowa 19. Cost of �ehicle Da*naga: ftot known 20. *�a.�a�e to Device: No unanticipa,ted parts daxoage 21. Cost o�' Installation Repafrs: parts = $.16 Iabor � $9.1? Tota1 = $9•33 22. Total Im�acts at Tus Location as o� this Date: 1 23. Conclusions: See atta.ched sheet Addsnd�.u�s Attac�sd: Conclusions, photos, construction plan . . � roww �uie sTO :�o� � INTERDEPARTMENT MAIL I owTC � February 22, 1971 DEIARTMENT Mr. G. R. Turner, Division Engineer Federal Highway Administration FROM DErARTM[NT Mr. R. M. Williston, Director of TraffYc Transportation, Bureau of Highways su��ccT Report of Accident Involving Impact Attenuation Device Transmitted herewith is a report campiled by this of'f`ice concerning a recent accident involving an eaperimental impa:ct attenuation device. Type of device: Aydro-Cushion Cell 8andwich Unit Location of device: I-95 at Boaduay to Route 7 northbound� Norwalk. Date of impact: February 5� 1971 Federal aid project a�'ber: I-IG-95-1(10)15 �� , ,� (�.;,� J r .� �`�D R. M. Williston � JWF�lcs cc: A. C. England T. H. Sellew R. M. Williston - �'. M. D'Addabbo G. S. Koch - T. E. Cressey R. Monteleone - J. C. Spenepr J. Sollmi - J. W. Ford Central Files REPRINTED BY ENBtGY ABSORPTION SYSTEMS 915 FEE DRNE SACRAMENTO, CALiF. 95815 PH. 9Z7-0178 . • � CONCLUSIONS Thi.s was the first iacpact on the I�ydro-Cushion Cell Sandwich Unit since its installation. 7:he impact was first reported to this office by Mr. Arthur Dinitz of F�ydro-Cell, Ltd. who noticed it as he passed the unit on the moraing of February 5, 1971. Photos 1 through 4 were taken by Mr. Dinitz and clear�y shaw the direction of impact. It is evid.ent fr� these pictures that the vehicle wa.s probably a passenger car or sma11 truck. The operator had apparent�y lost control of his vehicle due to the icy pavement in the area at the tim,e. Note the ice build-up on the exit sign. The skid marks of the vehicle indicate the front wheels had been turned to the left in a vain attempt to avoid colliding with the unit. (Note the variance in the width of the skid maxks as theyapproach the unit, indicating that the operator had attempted to steer away). The unit tiras compressed some f�ve feet in the. colLision. Mr. Dinitz ha.s informed this office that such a compression w�uld indicate a.n impact speed of 30 to 35 m.p.h., assuming the vehicle was a standard size and weight passen�er car. Photos 5 thru l� were ta.ken by the State during an investigation of the scene by engineers f�om the Off�ce of TraffYc. It should be noted that most of the tra.cks in the gore had been obscured by Maintenance Forces during snow removal opera.tions. Photos 5 thru 8 show various f�ont views of the device. Several of the cell covers had �een imrerted by the escaping water. Photos 9 and 10 show side views of the unit. In photo 10 the relative ccm�pression of the device is shown. The location of the primary cable anchor is direct],y beneath the right leg of the figure in this photo. Co�parison of this photo should be made with the copy of the construction plaa attached. Examination of the device revealed no serious damRge. Aa expected, the secondary ca.bles had released on impact. This is shown in photo 1�F. The moisture seal of one individual cell was missing. 1Qo other damage to the unit was observed. Ma.intenance forces had restored the device to flil.l operational sta.tus by Monday moraing, Februaxy 8th. The cost of necessary repa3rs was $9•33• Photos 15 thru 1$ were �aken following repair of the unit. It is the opinioa of this office that the I�ydro-Cushion Cell Sandwich Unit installed at this location f�nctioned as intended. Given the roa.dway conditions and. estimated speed of the vehicle, it has been determined that the concrete para,pet wall would have been struck itt such a marmer as to cause serious d�mage to the vehicle a.nd probable personal injury to the occupa.nt(s) had �he device not been present. It is to be ass�ed that neither cax or driver were serious�jr affected since no report has been ma.de to either State or Local Police. 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RECONIl�fENDED EQUIPMETd`P AND TOOLS for ' � r" , • INSTALLATIOPI OF HI-DRO CELL UNIT 1 -- . Skil Roto Hamrler Model t�10. 728 2 -- 1/2" Carbina tip Bits for Roto Hammer 3 -- 3/4" Carbide `iip �its for Roto Hammer • 1 -- 1/2" Drive �mpact Wrench (Electric) 3/4�� - 9/16" - 1/2" (3/4" Deep Socket) sockets for above 1 -- 1-1;8" x 18" Box End Wrench 1 -- 6 lb. Mall (Hammer) 1 -- 3/8" Electric Drill with 1/8" - 1/4" - 5/16" Bits � +�i 1 -- 5" Ratchet Wrench with l/8" Drive with 7/16" - 1/2" . 3/8" Sockets ' 1 -- 3/8" Die to clean Threads 1 -- 9/16" Die to clean Threads (Hex Type for use with Socket Wrench) 1 -- 14" Pipe Wrench, For Cable (7/8") 1 -- 18" Pipe Wrench 1 -- Broom 1 -- 100' 3 Wire Extension Cord . 1 -- 10" Crescent Wrench 1 -- 2500-3000� Watt Generator . 1 -- 600 Gal. Water Container _ 1 -- Acetylene Cutting Torch l -- Large Funnel with 3/4" Outlet 1 -- Truck with Crane Facilities ("A" Frame of Hydraulic) 1 -- 3/4" Drive x 24" Ratchet Wrench 1 -- 3/4" x 6" Estension 1 -- 3/4" x 1-1/8" Socket Means for blowing Concrete Dust out of Drilled Holes Calcium Chloride to prevent freezing (Chart Enclosed) _, _ . . � 3 � �� - � ;�,� ,� �'.:�� irES! ,�iioE � g .. � . ��a�i8�:� .. � - "� � �� Y � �.x � - � . Y°"� & " �. ,�,� " ' A�: ° Proposed ;m��;4P�tten�ator, on hta�yland Ave. at thc Burt ington-t�orftttrn Rat 1roa� � s Y . _,;,�:.,.�r x.��. �rad�e��i�fi�Iw ��'� :�''°h";°� .,.Aiw y. .� L i a r+�tsc.e SX. C i t y. tro j tt L-.1�.��,��.�Y:�, - LQL�I OA� � : ~'tiar"land f�v�. i'S Lhc c;`•� `�:a^ifnuous Teast'�we�t tt'aft""�c .ffcility Degtrt►+iRq "�C � .�s.� :ta° , Y p�,l 7hi s ti�e rar €ast sicie a�d connec.;.�f� to �orr� Ave. in t�e �idway area of St. • al ignnertt dqes have `grade ,se�rat ions a-t the r�i i�oad'traC oacha d�ZO�b��i 1!^S '"�; - �' - '��jr. '1`ii'es roaiiway pi-escr,�ty catries tr��`�ic`vclumc� �►PP � per �ay ort faur s�tistandard i0 rt. and il ft. wide traffic 1aFtes. _ The referenced gra�e separat�� brid�e v�as constructzd with a pier loeated-in�"-:� ¢ ' the eenter of Maryland Ave. T�►e roadw�y on Maryiand /4ve. ha5 on absoiut� m�n�m�m width , ar;d the center p'ser does irr��ose a'�a�dAtL�a��st�thr�ssyearsah�ve•f�tiuited . acc+dents in which vehie{es 5truck tbe p in two serious p�rsonai injuries and one fatality. 1?i.`',r;�► �,r Q(3RT i,h� impact attenuator uevice we have se3e_teo consists or a etuster of k�+ hoJlow Y:�ly` �ii�i.^i:IG G%iiC:�lc:iS � `�3';1:� ;; ':li.il �:IiGK Vv�i: � 5 � ��1C� c f101;�t�18i o�tsidc diameter Ot � � ounds of cal- six inct�vs. The eei :s arc i�.cn fii }ed with a so�ution cG�taining �� GiU�� i�l,,}� iuC JGI' <;v� �i�n GL tYo<e�'' . ':.°?r +iGLic�"1 O� lhe Ce� iS are GlOSC�� With ihC LO� c-id cc.,;;tui�ting orii'ic�es to re;;uia:e �':�c rc:lease or ��ate� . A vinyi eap attached to the t�;� ��vents evaporation and cc►nia.�inat�o�� of the water in the cell . ps t,3e c�ii wai � de`lects inwarc;, t�e int�rza� volume decreases , cwu5iny a p�f'SSV;e j�F�;i:?,�@ It15IG�Z :h�= �•:�� 3 . Ti�E raZe o= pressure increa�e and Lh@ R1dXIf1U�1 ;;��;�a? pressure are control ':ed ;�y tk-�e o�'� `ices in LF►e insert at the to� of the ;;;;; , , it 'ss t�is pressure which mitiyaies the crash by dissip�ting the ki�etic er,e;;�,° at cor,lrc i icd ra:es . - , :: u•�51 J� �USt I f I�uL 10"1 �Gi" L�i= � i-i`i �Gc^. I S based Or1 I �S adaptab+ 1 1 t�J tJ �1'eVC�l� r� • e,�ct o�1��nr.,e;;t intu t;,e ae� i�4��:cd tr�a�� ic .ianes. T��i s device �ppears to be designe ��,c�; �,-,,,t no ;o; i d Lebr i s w i l 1 be .�ei't on t`e roadway af ter e i thcr a head-on or a S� u�� t,n;ie im�aet. ii.s3Ft 5�ti:t li:r i�u�urGOU:� tOGdL1Oi��i tfli�t �houtid also i�e protected. Ti.L C 1 l'� �:L$ �7� ;;;�-cfc„•e, r�e ure de� irous o.` ir�staiiin� t�,is c;evice to give sor±se individua] exper- iencL to aici ir► ths determinaiion of particuiar cvnditions of use. as weii as a , per t�cr;�a�+:.c cva wat �on. � I . , „ . • • _ ��