WO2000008258A1 - Traffic divider for calibrating the deceleration of vehicles upon impact - Google Patents
Traffic divider for calibrating the deceleration of vehicles upon impact Download PDFInfo
- Publication number
- WO2000008258A1 WO2000008258A1 PCT/IT1999/000146 IT9900146W WO0008258A1 WO 2000008258 A1 WO2000008258 A1 WO 2000008258A1 IT 9900146 W IT9900146 W IT 9900146W WO 0008258 A1 WO0008258 A1 WO 0008258A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- barrier
- roads according
- safety barrier
- elements
- receptacle
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/02—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic specially adapted for sustaining vegetation or for accommodating plants ; Embankment-type or crib-type noise barriers; Retaining walls specially adapted to absorb or reflect noise
- E01F8/027—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic specially adapted for sustaining vegetation or for accommodating plants ; Embankment-type or crib-type noise barriers; Retaining walls specially adapted to absorb or reflect noise with external support, e.g. wall facing
- E01F8/028—Through-type, e.g. between adjacent kerbs
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/04—Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips supported above ground at spaced points
- E01F15/0407—Metal rails
- E01F15/0415—Metal rails with pivoting members
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0088—Suspended, e.g. ropes or mesh
Definitions
- the present invention relates to a traffic divider, and in particular to a bifi lar ⁇ i.e. forming two rows) asymmetric barrier, with an amount of earth interposed for the purpose of providing an ornamental hedge ac ing as protection means against l ight rays. More specif i ca I ly, the barrier according to the invention is a barrier of this kind, having a New Jersey profi le comprising several prefabricated modules.
- Barriers with a high resistance are therefore very rigid; for this reason, upon impact by a light vehicle (automobiles having a weight between 800 and 1500 Kg), even at very high speeds corresponding to energies up to 70kJ, no problem is encountered with respect to vehicle retention, but the decelerations transmitted to the passengers may be very high and fatal. In many cases of accidents caused by automobiles, the relatively low energies involved, are not sufficient to trigger a displacement of the barrier so as to cal ibrate and reduce the decelerations.
- Barriers preven ing vaulting by goods vehicles with a weight between 3 and 44 tons may represent a fatal obstacle (because of their rigidity) upon impact by automobi les having a weight comprised between 800 and 1500 Kg.
- the most important problem is to obtain protection and prevent vaulting of the barrier - particularly in the case of traffic dividers -, for the whole variety of vehicles circulating on the road, w ich have extremely different masses, dimensions and velocities.
- the bivalence or twofold nature of the barrier (the guarantee of protection both for heavy vehicles and l ight vehicles), is obtained using barriers made of concrete and with a shape of their inner side - facing the road -, w ich is named "New Jersey", and which is useful for "lifting" the light vehicle and realign it with respect to the carriageway, in case of very low impact energies.
- the impact energy is low if the impact angle and/or the velocity is low.
- the present "New Jersey" barriers used as traffic dividers are unable to cal ibrate the decelerations which the barrier transmits to a light vehicle hitting the barrier with a high impact angle and a high velocity; the impact energy of the light vehicle, being high but not extremely high, may fail to cause a displacement of the barrier, which has a considerable mass (about 3 tons per metre ) .
- An object of the present invention is to realize a traffic divider of the New Jersey type made of prefabricated concrete modules, being suited to calibrate the decelerations of the vehicle upon impact, according to the type of vehicle and its impact energy, the latter being determined by its mass, velocity and impact angle with respect to the barrier.
- the barrier of the present invention must however always ensure the retention of a colliding vehicle having a noticeable mass (from 3 to 44 tons), so as to maintain its "bivalence".
- the barrier must ensure, by means of the earth interposed between the two rows of the New Jersey barrier, the realization and maintenance of an ornamental hedge serving as a means of protection aga i nst I i ght rays.
- a two-row (bif Mar) asymmetric barrier comprising a mass of interposed earth, by providing a receptacle for said earth, which is laid on the embankment and forms two continuous gaps (spaces) behind the rear wall of each element of the barrier.
- said receptacle is formed by a "sack" of nonwoven fabric, suited to allow the passage of rain water and to ensure the growth and maintenance of the hedge .
- the receptacle is preferably laid on the embankment, between both elements of the traffic divider, and is hooked to brackets or supports fixed at the upper ends of the barrier elements.
- the calibration of the resistant forces ⁇ and of the resultant decelerations) in case of i pacts caused by automobiles with energies up to 65-70 kJ is obtained through a first "free" displacement, of some centimetres, and through a second step which starts when the barrier which is hit by the vehicle abuts the mass of earth (loam soil which is lightened by the addition of expanded clay or the l ike) contained inside the sack, and causes a partial lateral compression of said earth, since the latter is neither much compacted, nor hindered by an obstacle on its rear side.
- the barrier since the mass of earth ⁇ before impact and in the initial condition) does not abut the barrier elements, the barrier is able to move rearwards , thereby limiting the vehicle deceleration.
- the displacement of the barrier in case of an impact caused by a heavy vehicle, where the energies involved are much higher, the displacement of the barrier does not end after the step previously described, instead, it continues and causes the displacement of the sack, until abutment with the other barrier element and compression of said amount of earth occurs.
- the barrier is therefore suited to provide resistant forces which increase as a function of the energies involved during the i pact, and at the same time it is suited to calibrate the decelerations of the vehicle and consequentl of its passengers.
- the barrier may be provided on its lower side with devices or runners which are fixed to the module of the barrier and/or to the support of the foundation (for instance the curbstone made of concrete, the road pavement or the soi l).
- the runners are formed by stainless steel plates with a flat smoothed surface.
- first stainless steel plate to a barrier module, and a second steel plate of identical extension, to the foundation curbstone, if any, or to the pavement.
- Fig. 1 is a cross-sectional iew of a two-row (bifilar) asymmetric barrier with an amount of interposed earth, according to the invention, in the initial condition ( before he i pact ) ,
- Fig. 2 shows the free displacement of the barrier of Fig. 1, in the initial step of the impact
- Fig. 3 shows the displacement of the barrier of Fig. 1 and the compression of the earth during the second step of the impact, which would be caused only in a small amount by a light vehicle, but entirely by a heavy one
- Fig. 4 is a detail of Fig. 1, showing (in cross section) a particular embodiment of the runners, mounted in the junction region of the New Jersey barrier;
- Fig. 5 is a sectional view of an alternative embodiment for the shape of the sack made of nonwoven fabric shown in Fig. 1, suited to increase the gaps with respect to the New Jersey barriers; the initial condition (before the impact) being shown in this figure.
- the figures show a two-row asymmetric traffic divider including an amount of interposed earth, and of the so- cal led New Jersey type, according to the present invention, comprising two asymmetric, continuos, concrete-made modular elements 1,1', between which is arranged a receptacle 2 for the earth 3 (loam soi l l ightened by adding expanded clay or the like).
- the upper layer of said earth amount 3 is preferably formed exclusively by expanded clay and forms the mulching (soi l cover) for the protection of the ornamental plants used as a hedge 4 for protection against the l ight rays.
- arth means any kind of mixture obtained by combining loam soi l and expanded clay or some other kind of light material of analogous features, employing variable ratios between the volumes of the single components in order to vary the specific weight and consequently the weight per metre, according to the desired displacements and decelerations to be produced by the vehicles hitting the barrier 1,1'.
- the receptacle 2 does not extend inside the whole space between the two continuos elements 1,1' forming the barrier, instead, it leaves two gaps or spaces of variable size according to the maximum al lowable free displacement ( in the first step of the impact) of the barrier element 1 or 1', which is simply laid on the foundation support.
- the continuos elements 1 or 1' are laid on concrete-made curbstones, denoted by 5, 5', but this is not always the case.
- the two elements 1, 1' wi ll be laid on the road pavement, l ike that indicated by 6, 6', and that, possibly, the road pavement 6, 6' continuosly extends below the whole barrier 1, 1 '.
- the receptacle 2 is made by a sack of non woven fabric, which may be reinforced and protected by a net with variable mesh of suitable material (e.g. nylon, plastics, etc) or geo-texti le (that is environment friendly fabric) material, which al lows the passage of water and at the same time gives a certain toughness and the desired shape to the "sack" 2.
- This external covering of the receptacle 2 makes possible to real ize different configurations of the "sack" 2, for instance l ike the one shown in the variant of Fig. 5.
- the lower portion 7 of the receptacle 2 is paral lel to both barrier elements 1, 1 ', so that, in contrast with the representation of Fig. 1, the two gaps 8, 8'do not become narrower towards the base of the barr i er.
- the shape of the gaps 8, 8' may vary according to the design.
- the receptacle 2 is fixed by means of hooks or the like, to holding brackets 9, 9', which may extend continuosly or d i scont i nuos I along the barrier. Th e holding brackets 9,9' must not resist to a high weight, since the receptacle 2 is laid for this reason on the embankment, and the hooking system must be provided with screw couplers or the like, which can adjust the tension and the "traction" exerted by the receptac I e 2.
- a fixing system of a removable kind comprising hooks or the l ike, al lows to replace the receptacle 2.
- the sack 2 may also be arranged so that its base penetrates inside a cavity or trench (not shown) which is paral lei to the barrier and is formed in the embankment, between the two elements 1,1'. It is also possible to realize the receptacle 2 in a continuos form, in the longitudinal direction, by means of superposition, or to realize per i metr i ca I I y closed sacks to be located at desired reciprocal distance.
- an upper plate 10 for instance of stainless steel which is fixed to the barrier, including a lower portion 11a and a vertical portion 11b which are integrally formed (actually the plate forms an angle iron),
- a lower plate 12 (e.g. stainless steel) having in general a smal ler tnickness than the thickness of the upper plate 10, and which is fixed to the support 5;
- a layer of material with a low friction coefficient for instance a Teflon sheet 13, arranged in sandwichl ike fashion between said plates 10, 12, and fixed or glued to either of the plates 10, 12.
- the upper plates 10, 10' (Fig. 1) of the barrier 1, 1' are also used in order to connect two respective adjacent modules.
- a bush 15 is embedded in the concrete, at the foot of a module, whereas the other bush is embedded in the concrete of the foot of the adjacent module.
- the cross section can only show a single bolt 14 and a single corresponding bush 15.
- tha value of the decelera ions can be optimized in the first step or first period of the impact, so as to ensure maximum protection also to the vehicles with a weight between 800 and 1500 kg.
- the present invention is not limited to the case of sl iders arranged at the junction between adjacent modules.
- the sliders or runners can be mounted at different locations on the base of the elements 1,1'; in this case the vertical portion 11b used for the connection, could be omitted, and the upper runner 10 can be formed only by the horizontal portion 11a, fixed for instance by screw anchors to the base of the e I ements 1 , 1 ' .
- portion 11a and the lower plate 12 may extend from one end to the other of the base of the module, in the transversal or longitudinal direction.
- the number of runners or sliders, provided for each module, may also vary.
- the detail A of Fig. 4 should not be interpreted in a limitative way.
- a s illed reader can appreciate that a sliding device may comprise only the upper plate, or only the lower plate, or only the two plates, omitting the layer or sheet of very low friction material arranged between the plates themselves.
- the sliders may be fixed using instead of pins (see plate 12) or bolts 14 ⁇ see plate 10) any other known method, e.g. a magnetic means, or glues, resins, etc.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
- Road Signs Or Road Markings (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
- Traffic Control Systems (AREA)
- Luminescent Compositions (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU41635/99A AU4163599A (en) | 1998-08-07 | 1999-05-25 | Traffic divider for calibrating the deceleration of vehicles upon impact |
EP99925269A EP1102898B1 (en) | 1998-08-07 | 1999-05-25 | Traffic divider for calibrating the deceleration of vehicles upon impact |
DE1102898T DE1102898T1 (en) | 1998-08-07 | 1999-05-25 | CENTER STRIP GUIDANCE FOR CALIBRATING THE DELAY OF AN IMPACTING VEHICLE |
AT99925269T ATE282736T1 (en) | 1998-08-07 | 1999-05-25 | CENTER STRIP GUARDS FOR CALIBRATION OF THE DECELERATION OF AN IMPACT VEHICLE |
US09/744,717 US6517279B1 (en) | 1998-08-07 | 1999-05-25 | Traffic divider for calibrating the deceleration of vehicles upon impact |
DE69922013T DE69922013T2 (en) | 1998-08-07 | 1999-05-25 | MEDIUM STRIP PLANKS FOR CALIBRATION OF THE DELAY OF AN IMPACTING VEHICLE |
GR20010300065T GR20010300065T1 (en) | 1998-08-07 | 2001-11-30 | Traffic divider for calibrating the deceleration of vehicles upon impact |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1998RM000533A IT1302427B1 (en) | 1998-08-07 | 1998-08-07 | ROAD SAFETY BARRIER FROM NEW JERSEY PROFILE SCORING WITH DEVICES FOR THE CALIBRATED DECELERATION OF HURRYING VEHICLES. |
ITRM98A000533 | 1998-08-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000008258A1 true WO2000008258A1 (en) | 2000-02-17 |
Family
ID=11406093
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IT1999/000146 WO2000008258A1 (en) | 1998-08-07 | 1999-05-25 | Traffic divider for calibrating the deceleration of vehicles upon impact |
Country Status (9)
Country | Link |
---|---|
US (1) | US6517279B1 (en) |
EP (1) | EP1102898B1 (en) |
AT (1) | ATE282736T1 (en) |
AU (1) | AU4163599A (en) |
DE (2) | DE1102898T1 (en) |
ES (1) | ES2161205T3 (en) |
GR (1) | GR20010300065T1 (en) |
IT (1) | IT1302427B1 (en) |
WO (1) | WO2000008258A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105155445A (en) * | 2015-09-25 | 2015-12-16 | 中建交通建设集团有限公司广西分公司 | Loose-leaf type template for planting groove and anti-collision guardrail |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6851887B2 (en) * | 2002-02-25 | 2005-02-08 | Carl Lembo | Roadway barrier system with restraining bracket and method of installation |
US20030223812A1 (en) * | 2002-05-07 | 2003-12-04 | Ben Vandenbossche | Magnum FP planter barrier |
WO2006006947A1 (en) * | 2003-05-10 | 2006-01-19 | Ben Vandenbossche | Planter security barricade system (psbs) |
US20040261332A1 (en) * | 2003-06-30 | 2004-12-30 | Lakdas Nanayakkara | Blast protective barrier system |
US7252331B1 (en) * | 2003-11-24 | 2007-08-07 | Dorothy Goodrich Walton | Security bench |
DE102005030412A1 (en) * | 2005-06-30 | 2007-01-04 | Tss Technische Sicherheits-Systeme Gmbh | Restraint system |
KR100594892B1 (en) | 2006-03-30 | 2006-06-30 | 주식회사 선진엔지니어링 종합건축사 사무소 | A median strip for absorbing shock |
GB0804487D0 (en) | 2008-03-11 | 2008-04-16 | Terram Ltd | Cellular structures |
US20090235814A1 (en) * | 2008-03-24 | 2009-09-24 | Cashin Arthur H | Mobile Reconfigurable Barricade |
US20090250675A1 (en) * | 2008-03-24 | 2009-10-08 | Arthur Henry Cashin | Vehicle Barrier |
US20090235507A1 (en) * | 2008-03-24 | 2009-09-24 | Arthur Henry Cashin | Method Of Repairing A Ballistics Barrier |
US20090235813A1 (en) * | 2008-03-24 | 2009-09-24 | Arthur Henry Cashin | Ballistics Barrier |
DE102008045502A1 (en) * | 2008-09-03 | 2010-03-04 | Scharfenbaum, Hans-Jörg | Road for traversing by tractor, has driving surface limitations i.e. concrete protection walls, that are spaced apart from each other, and biological useful plant that is provided as energy carrier on center strip for energy utilization |
GB2493007B (en) | 2011-07-21 | 2017-08-30 | Fiberweb Holdings Ltd | Confinement structures for particulate fill materials |
US8545126B1 (en) * | 2013-01-08 | 2013-10-01 | Abdulreidha Abdulrasoul AlSaffar | Portable traffic safety barrier |
ES2671643B2 (en) * | 2018-04-25 | 2018-10-05 | Jesus RAMIREZ CARPEÑO | SUPPORT FOR ROAD REMOVAL PROTECTIONS |
US10508394B1 (en) * | 2018-06-19 | 2019-12-17 | Chongqing University | Device for vehicle hindrance and rainwater treatment and system comprising the same |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1073416A (en) * | 1963-08-19 | 1967-06-28 | Holland Proc | Highway guard |
DE2337498A1 (en) * | 1973-07-24 | 1975-02-13 | Walter Schaefer | Road boundary protection - has catch net with rollers to guide vehicles back and earth dam with bushes in centre |
US5054954A (en) * | 1989-03-16 | 1991-10-08 | International Barrier Corporation | Roadway barrier |
WO1998019015A1 (en) * | 1996-10-31 | 1998-05-07 | Autostrade Concessioni E Costruzioni Autostrade S.P.A. | Single-row traffic divider |
Family Cites Families (7)
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US3982734A (en) * | 1975-06-30 | 1976-09-28 | Dynamics Research And Manufacturing, Inc. | Impact barrier and restraint |
US4423854A (en) * | 1979-11-26 | 1984-01-03 | International Barrier Corporation | Roadway barrier |
US4321989A (en) * | 1980-01-22 | 1982-03-30 | Meinco Mfg. Co. | Energy absorbing impact barrier |
US5052850A (en) * | 1990-07-17 | 1991-10-01 | Bishop Robert J | Resilient safety extension for highway barriers |
US5531540A (en) * | 1995-01-13 | 1996-07-02 | Yew Corporation | Reinforcement system for highway barriers |
AU8586598A (en) * | 1997-07-14 | 1999-02-08 | Vision Molded Plastics, Ltd. | Spacer for supporting a guard rail on a post |
US6276667B1 (en) * | 1999-10-15 | 2001-08-21 | W. Eugene Arthur | Energy dissipating system for a concrete barrier |
-
1998
- 1998-08-07 IT IT1998RM000533A patent/IT1302427B1/en active IP Right Grant
-
1999
- 1999-05-25 DE DE1102898T patent/DE1102898T1/en active Pending
- 1999-05-25 WO PCT/IT1999/000146 patent/WO2000008258A1/en active IP Right Grant
- 1999-05-25 AU AU41635/99A patent/AU4163599A/en not_active Abandoned
- 1999-05-25 EP EP99925269A patent/EP1102898B1/en not_active Expired - Lifetime
- 1999-05-25 ES ES99925269T patent/ES2161205T3/en not_active Expired - Lifetime
- 1999-05-25 AT AT99925269T patent/ATE282736T1/en not_active IP Right Cessation
- 1999-05-25 US US09/744,717 patent/US6517279B1/en not_active Expired - Lifetime
- 1999-05-25 DE DE69922013T patent/DE69922013T2/en not_active Expired - Lifetime
-
2001
- 2001-11-30 GR GR20010300065T patent/GR20010300065T1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1073416A (en) * | 1963-08-19 | 1967-06-28 | Holland Proc | Highway guard |
DE2337498A1 (en) * | 1973-07-24 | 1975-02-13 | Walter Schaefer | Road boundary protection - has catch net with rollers to guide vehicles back and earth dam with bushes in centre |
US5054954A (en) * | 1989-03-16 | 1991-10-08 | International Barrier Corporation | Roadway barrier |
WO1998019015A1 (en) * | 1996-10-31 | 1998-05-07 | Autostrade Concessioni E Costruzioni Autostrade S.P.A. | Single-row traffic divider |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105155445A (en) * | 2015-09-25 | 2015-12-16 | 中建交通建设集团有限公司广西分公司 | Loose-leaf type template for planting groove and anti-collision guardrail |
Also Published As
Publication number | Publication date |
---|---|
DE69922013D1 (en) | 2004-12-23 |
DE1102898T1 (en) | 2002-01-17 |
EP1102898A1 (en) | 2001-05-30 |
AU4163599A (en) | 2000-02-28 |
DE69922013T2 (en) | 2005-11-24 |
US6517279B1 (en) | 2003-02-11 |
ITRM980533A0 (en) | 1998-08-07 |
ES2161205T3 (en) | 2005-05-01 |
GR20010300065T1 (en) | 2001-11-30 |
IT1302427B1 (en) | 2000-09-05 |
ITRM980533A1 (en) | 2000-02-07 |
ATE282736T1 (en) | 2004-12-15 |
EP1102898B1 (en) | 2004-11-17 |
ES2161205T1 (en) | 2001-12-01 |
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