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  2. Grade (slope) - Wikipedia

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

    Slope may still be expressed when the horizontal run is not known: the rise can be divided by the hypotenuse (the slope length). This is not the usual way to specify slope; this nonstandard expression follows the sine function rather than the tangent function, so it calls a 45 degree slope a 71 percent grade instead of a 100 percent. But in ...

  3. List of steepest gradients on adhesion railways - Wikipedia

    en.wikipedia.org/wiki/List_of_steepest_gradients...

    Incline from the Causeway Street Tunnel up to the Lechmere Viaduct on the Green Line (MBTA), Boston, Massachusetts, United States [15] This incline is commonly believed to be the "steepest grade of tracks in the T system." [16] 1 in 15.9 (6.3%) Alishan Forest Railway, Taiwan: 1 in 16.4 (6.1%) Hunsrückbahn, Germany: Built as a rack railway.

  4. Grading (earthworks) - Wikipedia

    en.wikipedia.org/wiki/Grading_(earthworks)

    Section through railway track and foundation showing the sub-grade. Grading in civil engineering and landscape architectural construction is the work of ensuring a level base, or one with a specified slope, [1] for a construction work such as a foundation, the base course for a road or a railway, or landscape and garden improvements, or surface drainage.

  5. Bright Angel Trail - Wikipedia

    en.wikipedia.org/wiki/Bright_Angel_Trail

    It has an average grade of 10% along its entire length. At trail's end, the River Trail continues another 1.9 miles to the Bright Angel Campground and Phantom Ranch . These two trails combined are the most common method used to access Phantom Ranch by hikers and mules.

  6. Pikes Peak Cog Railway - Wikipedia

    en.wikipedia.org/wiki/Pikes_Peak_Cog_Railway

    The average grade of the line would be 12% but would top out at 25%. Normal trains can not retain traction on the rails at grades steeper than 10%, so the railway would need to use a cog and rack system to help pull trains up the mountain and control the speed of the descent. [4] Pikes Peak Cog Railway locomotive and car, circa 1900

  7. Slope - Wikipedia

    en.wikipedia.org/wiki/Slope

    Slope illustrated for y = (3/2)x − 1.Click on to enlarge Slope of a line in coordinates system, from f(x) = −12x + 2 to f(x) = 12x + 2. The slope of a line in the plane containing the x and y axes is generally represented by the letter m, [5] and is defined as the change in the y coordinate divided by the corresponding change in the x coordinate, between two distinct points on the line.

  8. Geometric design of roads - Wikipedia

    en.wikipedia.org/wiki/Geometric_design_of_roads

    The alignment is the route of the road, defined as a series of horizontal tangents and curves. The profile is the vertical aspect of the road, including crest and sag curves, and the straight grade lines connecting them. The cross section shows the position and number of vehicle and bicycle lanes and sidewalks, along with their cross slope or ...

  9. Banked turn - Wikipedia

    en.wikipedia.org/wiki/Banked_turn

    Up until now, highway engineers have been without efficient tools to identify improperly banked curves and to design relevant mitigating road actions. A modern profilograph can provide data of both road curvature and cross slope (angle of incline). A practical demonstration of how to evaluate improperly banked turns was developed in the EU ...