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2. Five Advantages of a Gravel Driveway - AOL

   www.aol.com/five-advantages-gravel-driveway...

   Generally speaking, gravel driveways cost about $1 to $3 per square foot, according to Angi's List, which is much cheaper than asphalt ($7 to $15) or concrete ($4 to $15). The total cost depends ...

3. Cross slope - Wikipedia

   en.wikipedia.org/wiki/Cross_slope

   Cross slope, cross fall or camber is a geometric feature of pavement surfaces: the transverse slope with respect to the horizon. It is a very important safety factor. Cross slope is provided to provide a drainage gradient so that water will run off the surface to a drainage system such as a street gutter or ditch.

4. Drainage gradient - Wikipedia

   en.wikipedia.org/wiki/Drainage_gradient

   Drainage gradient (DG) is a term in road design, defined as the combined slope due to road surface cross slope (CS) and longitudinal slope (hilliness). Although the term may not be used, the concept is also used in roof design and landscape architecture. If the drainage gradient is too low, rain and melt water drainage will be insufficient.

5. Cellular confinement - Wikipedia

   en.wikipedia.org/wiki/Cellular_confinement

   Early research (Bathurst and Jarrett, 1988) [13] found that cellular confinement reinforced gravel bases are "equivalent to about twice the thickness of unreinforced gravel bases" and that geocells performed better than single sheet reinforcement schemes (geotextiles and geogrids) and were more effective in reducing lateral spreading of infill under loading than conventional reinforced bases.

6. Offering 12 new route designs, guide promotes region as ... - AOL

   www.aol.com/news/offering-12-route-designs-guide...

   The pleasure inherent in coursing headlong over sloping gravel is no less acute today. The network of trails and unpaved roads that surrounds Santa Fe is labyrinthine: Tesuqué, Cerrillos, the ...

7. Permeable paving - Wikipedia

   en.wikipedia.org/wiki/Permeable_paving

   Unlike a full-depth porous asphalt pavement, OGFCs do not drain water to the base of a pavement. Instead, they allow water to infiltrate the top 3/4 to 1.5 inch of the pavement and then drain out to the side of the roadway. This can improve the friction characteristics of the road and reduce road spray. [27]