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  2. Stairs - Wikipedia

    en.wikipedia.org/wiki/Stairs

    The tread depth of a step is measured from the edge of the nosing to the vertical riser; if the steps have no nosing, it is the same as the going; otherwise it is the going plus the extent of one nosing. The going of a step is measured from the edge of the nosing to the edge of nosing in plan view. A person using the stairs would move this ...

  3. Pavement condition index - Wikipedia

    en.wikipedia.org/wiki/Pavement_Condition_Index

    The pavement condition index (PCI) is a numerical index between 0 and 100, which is used to indicate the general condition of a pavement section.The PCI is widely used in transportation civil engineering [1] and asset management, and many municipalities use it to measure the performance of their road infrastructure and their levels of service. [2]

  4. 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 ...

  5. Grade (slope) - Wikipedia

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

    If one looks at red numbers on the chart specifying grade, one can see the quirkiness of using the grade to specify slope; the numbers go from 0 for flat, to 100% at 45 degrees, to infinity as it approaches vertical. Slope may still be expressed when the horizontal run is not known: the rise can be divided by the hypotenuse (the slope length).

  6. Neely, 30, died after Penny, a Marine veteran from Long Island, held him in a chokehold for six minutes on May 1, 2023, after he began shouting at and threatening passengers on a crowded subway ...

  7. Complete streets - Wikipedia

    en.wikipedia.org/wiki/Complete_streets

    By providing safe options for people to walk and bike, Complete Streets can lead to fewer people driving in their cars, resulting in lowered automobile emissions. The 2009 National Household Travel Survey found that 39% of all trips in metropolitan areas are three miles or less and 17% of all trips are one mile or less. [ 39 ]

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