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Because the Jersey-shape design requires very little modification to become an F-shape design, asphalt resurfacing, because it raises the overall height of the road surface relative to the barrier, can convert the Jersey-shape barrier into a more F-shape-like barrier that is safer for lighter cars.
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In spite of these tests, the F-shape barrier has not supplanted the Jersey-shape. The Jersey-shape barrier was already in wide use, and it also met the crash-test criteria. The states' contractors already had a significant investment in the Jersey-shape casting forms and it would cost them money to
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The F-shape and the Jersey-shape have the same slopes, but the distance from the ground to the slope break point of the F-shape is 255 millimetres (10.0 in), which is 75 millimetres (3.0 in) lower than the Jersey-shape. This lower slope break point reduces vehicle lift, improving the
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study, one that systematically varies the parameters, was done through computer simulations of barrier profiles labeled A through F. The result showed that the one labeled F performed better than even the shape of the Jersey barrier. A series of full-scale crash tests later confirmed these
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computer-based results. What is known today as the F-shape barrier takes its name from the label it was given on these tests and not from any part of the shape of the barrier, unlike, for example,
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However, these increased layers of asphalt also reduce the working height of the barrier which reduces its effectiveness for heavier vehicles.
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Dual carriageway / Divided highway / Expressway
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226:. Turner-Fairbank Highway Research Center. Archived from
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150:, originally designed to divide lanes of traffic on a
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Road safety barrier used to separate vehicle traffic
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60:. Unsourced material may be challenged and removed.
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158:design, and is generally considered safer.
154:. It is a modification of the widely used
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120:Learn how and when to remove this message
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1363:Median / Central reservation
7:
1665:
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58:adding citations to reliable sources
1679:. You can help Knowledge (XXG) by
1281:Risk compensation (road transport)
174:change the profiles of the forms.
25:
1667:
1647:Glossary of road transport terms
34:
1675:This road-related article is a
45:needs additional citations for
1:
1629:Pavement performance modeling
1619:International roughness index
224:"Basics of Concrete Barriers"
1624:Present serviceability index
1418:Sidewalk / Pavement
963:Diamond grinding of pavement
1596:Underpass / Tunnel
1591:Overpass / Flyover
1345:High-occupancy vehicle lane
1235:Driving under the influence
309:Freeway / Motorway
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1662:
523:Highway systems by country
1642:
1634:Granular base equivalency
1453:Traffic signal preemption
861:Right-in/right-out (RIRO)
767:Single-point urban (SPUI)
185:The UK equivalent is the
1614:Pavement condition index
1340:High-occupancy toll lane
1335:Contraflow lane reversal
1310:Barrier transfer machine
468:Express-collector setup
178:barrier's performance.
1652:Road types by features
1547:Raised pavement marker
1514:Constant-slope barrier
1438:Traffic directionality
1428:Street running railway
851:Protected intersection
204:Constant-slope barrier
136:
1509:Concrete step barrier
846:Offset T-intersection
187:concrete step barrier
135:
1552:Road surface marking
1250:Single-vehicle crash
973:Full depth recycling
871:Seagull intersection
54:improve this article
1726:Protective barriers
1378:Pedestrian crossing
941:Reinforced concrete
777:Three-level diamond
488:Two-lane expressway
473:Farm-to-market road
1408:Runaway truck ramp
1230:Driver's education
1018:Rubberized asphalt
953:Crocodile cracking
876:Split intersection
644:Hierarchy of roads
605:Single carriageway
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1468:Wide outside lane
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1271:Automotive safety
1152:Road slipperiness
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747:Diverging diamond
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610:Single-track road
552:Bicycle boulevard
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69:"F-shape barrier"
16:(Redirected from
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1504:Cat's eye (road)
1325:Complete streets
1097:Dead Man's Curve
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998:Pavement milling
913:Asphalt concrete
856:Quadrant roadway
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671:Street hierarchy
319:Elevated highway
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1562:Traffic barrier
1522:F-Shape barrier
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1433:Traffic calming
1393:Reversible lane
1383:Pedestrian zone
1368:Motorcycle lane
1330:Contraflow lane
1302:time allocation
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1286:Underride guard
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1102:Expansion joint
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841:Michigan left
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793:Intersections
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287:Types of road
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230:on 2006-04-27
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148:crash barrier
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71: –
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65:Find sources:
59:
55:
49:
48:
43:This article
41:
37:
32:
31:
19:
1681:expanding it
1674:
1567:Traffic cone
1557:Rumble strip
1458:Truck bypass
1413:Shared space
1373:Passing lane
1358:Managed lane
1315:Bicycle lane
1197:Washboarding
1192:Traffic sign
1117:Hairpin turn
886:Texas U-turn
816:Box junction
710:Interchanges
654:Route number
562:Country lane
304:Bike freeway
232:. Retrieved
228:the original
218:
184:
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107:
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64:
52:Please help
47:verification
44:
1731:Road safety
1605:Performance
1537:Kassel kerb
1494:Botts' dots
1482:Demarcation
1182:Storm drain
1147:Road debris
1072:Aquaplaning
1065:environment
1053:Road safety
931:Cobblestone
881:Superstreet
686:Winter road
634:Concurrency
627:Other terms
618:Sunken lane
587:Main street
532:Local roads
1736:Road stubs
1720:Categories
1607:indicators
1576:Structures
1527:Guard rail
1403:Road verge
1276:Seat belts
1212:Snowsquall
1177:Speed bump
1157:Road train
978:Glassphalt
918:Bioasphalt
891:Turnaround
866:Roundabout
796:(at-grade)
762:Roundabout
727:Cloverleaf
582:Green lane
518:Trunk road
446:Main roads
329:By country
234:2009-01-07
210:References
163:parametric
80:newspapers
1398:Road diet
1300:Space and
1245:Road rage
1132:Oil spill
1092:Crosswind
1082:Black ice
1077:Avalanche
1003:Permeable
836:Jughandle
831:Hook turn
737:Free-flow
681:Toll road
600:Side road
557:Boulevard
513:Super two
508:Ring road
483:Link road
382:Hong Kong
337:Australia
279:hierarchy
110:June 2010
1586:Causeway
1423:Shoulder
1259:Vehicles
1207:Whiteout
1167:Rockfall
1162:Roadkill
1087:Bleeding
1063:Road and
1023:Sealcoat
948:Corduroy
936:Concrete
926:Chipseal
905:Surfaces
757:Raindrop
572:Driveway
567:Dead end
547:Backroad
498:2+2 road
493:2+1 road
417:Portugal
407:Pakistan
193:See also
145:concrete
1489:Bollard
1473:Woonerf
1202:Washout
1142:Pothole
1055:factors
1043:Texture
1013:Plastic
993:Macadam
782:Trumpet
732:Diamond
503:Parkway
478:Highway
392:Ireland
372:Germany
362:Croatia
342:Belgium
168:T-walls
152:highway
94:scholar
1582:Bridge
1266:Airbag
1038:Tarmac
983:Gravel
811:Bowtie
752:Parclo
676:Stroad
639:Detour
614:Street
542:Avenue
427:Taiwan
412:Poland
377:Greece
352:Canada
347:Brazil
96:
89:
82:
75:
67:
1008:Plank
922:Brick
772:Stack
538:Alley
422:Spain
402:Nepal
397:Italy
387:India
357:China
143:is a
101:JSTOR
87:books
1677:stub
1518:Curb
1349:Lane
1112:Ford
1028:Sett
968:Dirt
596:Road
276:Road
139:The
73:news
1172:Rut
1107:Fog
988:Ice
56:by
1722::
189:.
170:.
161:A
1708:e
1701:t
1694:v
1683:.
718:)
714:(
268:e
261:t
254:v
237:.
123:)
117:(
112:)
108:(
98:·
91:·
84:·
77:·
50:.
20:)
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