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Dirt roads almost always form a washboard-like surface with ridges. The reason for this is that dirt roads have tiny irregularities; a wheel hitting a bump pushes it forward, making it bigger, while a wheel pushing over a bump pushes dirt into the next bump. However, the surface can remain flat for
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where they pass, and may be sandy, stony, rocky or have a bare earth surface, which could be extremely muddy and slippery when wet, and baked hard when dry. They are likely to become impassable after rain. They are common in
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352:, especially in wet weather, or on rocky or very sandy sections. It is as easy to become bogged in sand as it is in mud; a high clearance under the vehicle may be required for rocky sections.
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266:
regularly to produce an enhanced camber to encourage rainwater to drain off the road, and drainage ditches at the sides may be absent. They are unlikely to have
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not paved with asphalt, concrete, brick, or stone; made from the native material of the land surface through which it passes, known to highway engineers as
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Driving on dirt roads requires great attention to variations in the surface and it is easier to lose control than on a gravel road.
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through low-lying areas. This leads to greater waterlogging and erosion, and after heavy rain the road may be impassable even to
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Minicars, Maglevs, and Mopeds: Modern Modes of
Transportation Around the World: Modern Modes of Transportation around the World
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would normally be similar but less suitable for larger vehicles—the distinction is not well-defined.
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of many developing countries, where they may also be used as major highways and have considerable width.
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of many countries, often very narrow and infrequently used, and are also found in
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Unpaved roads with a harder surface made by the addition of material such as
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While most gravel roads are all-weather roads and can be used by ordinary
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Dual carriageway / Divided highway / Expressway
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132:"Fieldway" redirects here. For the area of Croydon, England, see
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Dirt roads take on different characteristics according to the
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545:"Road Bumps: Why dirt roads develop a washboard surface"
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Compared to a gravel road, a dirt road is not usually
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by highway engineers. Improved unpaved roads include
60:. Unsourced material may be challenged and removed.
202:, or the "Class Four Highway" designation used in
27:Unpaved road made from the land's native material
2008:
238:(stones), might be referred to as dirt roads in
329:velocities less than 5 mph (8 km/h).
274:. For this reason, in some countries, such as
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517:Sultana, Selima; Weber, Joe (2016-04-18).
120:Learn how and when to remove this message
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142:
14:
2009:
1707:Median / Central reservation
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341:, dirt roads may only be passable by
58:adding citations to reliable sources
29:
24:
1625:Risk compensation (road transport)
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25:
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461:Spraying dirt road with water in
1991:Glossary of road transport terms
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136:. For the light rail stop, see
45:needs additional citations for
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13:
1:
1973:Pavement performance modeling
1963:International roughness index
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413:Mountain track in Switzerland
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1968:Present serviceability index
1762:Sidewalk / Pavement
1307:Diamond grinding of pavement
7:
1940:Underpass / Tunnel
1935:Overpass / Flyover
1689:High-occupancy vehicle lane
1579:Driving under the influence
653:Freeway / Motorway
562:
437:Cycling on a rough road in
425:Detail of a dry, loamy road
10:
2033:
867:Highway systems by country
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1978:Granular base equivalency
1948:
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1797:Traffic signal preemption
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1205:Right-in/right-out (RIRO)
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1111:Single-point urban (SPUI)
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389:Lincoln Park neighborhood
242:but are distinguished as
220:Laterite and murram roads
1958:Pavement condition index
1684:High-occupancy toll lane
1679:Contraflow lane reversal
1654:Barrier transfer machine
812:Express-collector setup
1996:Road types by features
1891:Raised pavement marker
1858:Constant-slope barrier
1782:Traffic directionality
1772:Street running railway
1195:Protected intersection
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1853:Concrete step barrier
1190:Offset T-intersection
476:Rural dirt road near
387:Wrightwood Street in
333:Driving on dirt roads
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1896:Road surface marking
1594:Single-vehicle crash
1317:Full depth recycling
1215:Seagull intersection
286:, they are known as
54:improve this article
1722:Pedestrian crossing
1285:Reinforced concrete
1121:Three-level diamond
832:Two-lane expressway
817:Farm-to-market road
374:Fremont, California
1752:Runaway truck ramp
1574:Driver's education
1362:Rubberized asphalt
1297:Crocodile cracking
1220:Split intersection
988:Hierarchy of roads
949:Single carriageway
323:metropolitan areas
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150:on a dirt road in
138:Fieldway tram stop
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1812:Wide outside lane
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1615:Automotive safety
1496:Road slipperiness
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1091:Diverging diamond
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954:Single-track road
896:Bicycle boulevard
579:Green lane (road)
530:978-1-4408-3495-0
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288:dry-weather roads
272:off-road vehicles
252:macadamized roads
190:Terms similar to
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16:(Redirected from
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1848:Cat's eye (road)
1669:Complete streets
1441:Dead Man's Curve
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1342:Pavement milling
1257:Asphalt concrete
1200:Quadrant roadway
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663:Elevated highway
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1906:Traffic barrier
1866:F-Shape barrier
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1777:Traffic calming
1737:Reversible lane
1727:Pedestrian zone
1712:Motorcycle lane
1674:Contraflow lane
1646:time allocation
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1630:Underride guard
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1170:Continuous flow
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297:A dirt road in
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258:Characteristics
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134:Fieldway (ward)
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2017:Types of roads
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1807:Unused highway
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1787:Traffic island
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1584:Drowsy driving
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1165:Channelization
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1008:business route
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807:County highway
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244:improved roads
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1792:Traffic lanes
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1697:Living street
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1664:Climbing lane
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1566:Human factors
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1531:Traffic light
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1481:Oversize load
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1471:Manhole cover
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1302:Crushed stone
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1185:Michigan left
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1137:Intersections
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1086:Directional T
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1003:special route
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921:Frontage road
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43:This article
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19:
1911:Traffic cone
1901:Rumble strip
1802:Truck bypass
1757:Shared space
1717:Passing lane
1702:Managed lane
1659:Bicycle lane
1541:Washboarding
1536:Traffic sign
1461:Hairpin turn
1311:
1230:Texas U-turn
1160:Box junction
1054:Interchanges
998:Route number
906:Country lane
648:Bike freeway
574:Country lane
569:Byway (road)
549:. Retrieved
547:. 2007-08-15
539:
523:. ABC-CLIO.
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395:, Illinois,
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248:gravel roads
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52:Please help
47:verification
44:
1949:Performance
1881:Kassel kerb
1838:Botts' dots
1826:Demarcation
1526:Storm drain
1491:Road debris
1416:Aquaplaning
1409:environment
1397:Road safety
1275:Cobblestone
1225:Superstreet
1030:Winter road
978:Concurrency
971:Other terms
962:Sunken lane
931:Main street
876:Local roads
400: 1880
319:rural areas
280:New Zealand
268:embankments
216:earth track
181:Terminology
177:material.
69:"Dirt road"
1951:indicators
1920:Structures
1871:Guard rail
1747:Road verge
1620:Seat belts
1556:Snowsquall
1521:Speed bump
1501:Road train
1322:Glassphalt
1262:Bioasphalt
1235:Turnaround
1210:Roundabout
1140:(at-grade)
1106:Roundabout
1071:Cloverleaf
926:Green lane
862:Trunk road
790:Main roads
673:By country
551:2022-12-06
504:References
212:dirt track
200:earth road
80:newspapers
18:Dirt roads
1742:Road diet
1644:Space and
1589:Road rage
1476:Oil spill
1436:Crosswind
1426:Black ice
1421:Avalanche
1347:Permeable
1180:Jughandle
1175:Hook turn
1081:Free-flow
1025:Toll road
944:Side road
901:Boulevard
857:Super two
852:Ring road
827:Link road
726:Hong Kong
681:Australia
623:hierarchy
299:Kärsämäki
276:Australia
236:aggregate
192:dirt road
160:dirt road
2011:Category
1930:Causeway
1767:Shoulder
1603:Vehicles
1551:Whiteout
1511:Rockfall
1506:Roadkill
1431:Bleeding
1407:Road and
1367:Sealcoat
1292:Corduroy
1280:Concrete
1270:Chipseal
1249:Surfaces
1101:Raindrop
916:Driveway
911:Dead end
891:Backroad
842:2+2 road
837:2+1 road
761:Portugal
751:Pakistan
563:See also
482:Michigan
478:Kingsley
439:Tanzania
350:vehicles
175:subgrade
152:Paraguay
1833:Bollard
1817:Woonerf
1546:Washout
1486:Pothole
1399:factors
1387:Texture
1357:Plastic
1337:Macadam
1126:Trumpet
1076:Diamond
847:Parkway
822:Highway
736:Ireland
716:Germany
706:Croatia
686:Belgium
393:Chicago
314:geology
303:Finland
284:Finland
168:unpaved
94:scholar
1926:Bridge
1610:Airbag
1382:Tarmac
1327:Gravel
1155:Bowtie
1096:Parclo
1020:Stroad
983:Detour
958:Street
886:Avenue
771:Taiwan
756:Poland
721:Greece
696:Canada
691:Brazil
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497:Brazil
343:trucks
264:graded
232:gravel
148:Cattle
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1352:Plank
1266:Brick
1116:Stack
882:Alley
766:Spain
746:Nepal
741:Italy
731:India
701:China
584:Trail
463:Benin
310:soils
214:, or
208:track
204:China
164:track
101:JSTOR
87:books
1862:Curb
1693:Lane
1456:Ford
1372:Sett
1312:Dirt
940:Road
620:Road
525:ISBN
339:cars
312:and
282:and
278:and
250:and
234:and
206:. A
194:are
171:road
73:news
1516:Rut
1451:Fog
1332:Ice
391:of
345:or
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