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  2. Gravel road - Wikipedia

    en.wikipedia.org/wiki/Gravel_road

    A gravel road in Asikkala, Finland. A gravel road is a type of unpaved road surfaced with gravel that has been brought to the site from a quarry or stream bed.Gravel roads are common in less-developed nations, and also in the rural areas of developed nations such as Canada and the United States.

  3. Impervious surface - Wikipedia

    en.wikipedia.org/wiki/Impervious_surface

    Parking lots are highly impervious.. Impervious surfaces are mainly artificial structures—such as pavements (roads, sidewalks, driveways and parking lots, as well as industrial areas such as airports, ports and logistics and distribution centres, all of which use considerable paved areas) that are covered by water-resistant materials such as asphalt, concrete, brick, stone—and rooftops.

  4. Bitumen - Wikipedia

    en.wikipedia.org/wiki/Bitumen

    In the horse-drawn era, US streets were mostly unpaved and covered with dirt or gravel. Especially where mud or trenching often made streets difficult to pass, pavements were sometimes made of diverse materials including wooden planks, cobble stones or other stone blocks, or bricks. Unpaved roads produced uneven wear and hazards for pedestrians.

  5. Program available to reduce unpaved roads' erosion - AOL

    www.aol.com/news/program-available-reduce...

    For premium support please call: 800-290-4726 more ways to reach us

  6. Washboarding - Wikipedia

    en.wikipedia.org/wiki/Washboarding

    Washboarding effect on a road. Washboarding or corrugation [1] is the formation of periodic, transverse ripples in the surface of gravel and dirt roads.Washboarding occurs in dry, granular road material [2] with repeated traffic, traveling at speeds above 8.0 kilometres per hour (5 mph). [3]

  7. Answer Man: Unpaved trails to connect Asheville ... - AOL

    www.aol.com/answer-man-unpaved-trails-connect...

    The project is called AVL Unpaved, a community-supported initiative with the goal of "building a network of multi-use natural surface trails that will help Asheville-area residents and visitors ...

  8. Dirt road - Wikipedia

    en.wikipedia.org/wiki/Dirt_road

    Cattle on a dirt road in Paraguay.. A dirt road or track is a type of unpaved road not paved with asphalt, concrete, brick, or stone; [1] made from the native material of the land surface through which it passes, known to highway engineers as subgrade material.

  9. Rasputitsa - Wikipedia

    en.wikipedia.org/wiki/Rasputitsa

    Spring thaw and huge puddles in Komi Republic, March 2015. Rasputitsa (from Russian: распу́тица [rɐsˈputʲɪtsə]; literally "season of bad roads" [1]) is the mud season that occurs in various rural areas of Eastern Europe, [2] when the rapid snowmelt or thawing of frozen ground combined with wet weather in spring, or heavy rains in autumn [1] [3] lead to muddy conditions that make ...