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2. Grade (slope) - Wikipedia

   en.wikipedia.org/wiki/Grade_(slope)

   Grade, pitch, and slope are important components in landscape design, garden design, landscape architecture, and architecture; for engineering and aesthetic design factors. Drainage, slope stability, circulation of people and vehicles, complying with building codes, and design integration are all aspects of slope considerations in environmental ...

3. Cross slope - Wikipedia

   en.wikipedia.org/wiki/Cross_slope

   Cross section of a road. 1. Gutter; 2. Shoulder; 3. Sub-base; 4. Base course; 5. Asphalt. Cross slope, cross fall or camber is a geometric feature of pavement surfaces: the transverse slope with respect to the horizon.

4. List of steepest roads and streets - Wikipedia

   en.wikipedia.org/wiki/List_of_steepest_roads_and...

   San Francisco, California is known for having numerous steep streets: . The Filbert Steps section of Filbert Street has a maximum gradient of 31.5% (17.5°). [4] The steepest hill on Filbert is the one-way down east half of the block between Hyde and Leavenworth.

5. Road surface - Wikipedia

   en.wikipedia.org/wiki/Road_surface

   Pavement design methods are continuously evolving. Among these are the Shell Pavement design method, and the American Association of State Highway and Transportation Officials (AASHTO) 1993/98 "Guide for Design of Pavement Structures". A mechanistic-empirical design guide was developed through the NCHRP process, resulting in the Mechanistic ...

6. Geometric design of roads - Wikipedia

   en.wikipedia.org/wiki/Geometric_design_of_roads

   A geometric design saved on construction costs and improved visibility with the intention to reduce the likelihood of traffic incidents. The geometric design of roads is the branch of highway engineering concerned with the positioning of the physical elements of the roadway according to standards and constraints. The basic objectives in ...

7. Hairpin turn - Wikipedia

   en.wikipedia.org/wiki/Hairpin_turn

   Hairpin turn in Oregon, US A hairpin, after which the feature is named. A hairpin turn (also hairpin bend or hairpin corner) is a bend in a road with a very acute inner angle, making it necessary for an oncoming vehicle to turn about 180° to continue on the road.