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  2. Fundamental diagram of traffic flow - Wikipedia

    en.wikipedia.org/wiki/Fundamental_diagram_of...

    The graphs are two dimensional graphs. All the graphs are related by the equation “flow = speed * density”; this equation is the essential equation in traffic flow. The fundamental diagrams were derived by the plotting of field data points and giving these data points a best fit curve. With the fundamental diagrams researchers can explore ...

  3. Linear interpolation - Wikipedia

    en.wikipedia.org/wiki/Linear_interpolation

    Linear interpolation on a data set (red points) consists of pieces of linear interpolants (blue lines). Linear interpolation on a set of data points (x 0, y 0), (x 1, y 1), ..., (x n, y n) is defined as piecewise linear, resulting from the concatenation of linear segment interpolants between each pair of data points.

  4. VASCAR - Wikipedia

    en.wikipedia.org/wiki/VASCAR

    VASCAR (Visual Average Speed Computer And Recorder) is a type of device for calculating the speed of a moving vehicle. The first VASCAR device was created in 1966 by Arthur Marshall. [ 1 ] It is used by police officers to enforce speed limits , and may be preferred where radar or lidar is illegal, such as some jurisdictions in Pennsylvania ...

  5. Velocity - Wikipedia

    en.wikipedia.org/wiki/Velocity

    In terms of a displacement-time (x vs. t) graph, the instantaneous velocity (or, simply, velocity) can be thought of as the slope of the tangent line to the curve at any point, and the average velocity as the slope of the secant line between two points with t coordinates equal to the boundaries of the time period for the average velocity.

  6. Traffic flow - Wikipedia

    en.wikipedia.org/wiki/Traffic_flow

    The resulting plot is a pair of cumulative curves where the vertical axis (N) represents the cumulative number of vehicles that pass the two points: X 1 and X 2, and the horizontal axis (t) represents the elapsed time from X 1 and X 2. Figure 8. Simple cumulative curves Figure 9. Arrival, virtual arrival, and departure curves

  7. Tobler's hiking function - Wikipedia

    en.wikipedia.org/wiki/Tobler's_hiking_function

    Tobler's hiking function is an exponential function determining the hiking speed, taking into account the slope angle. [ 1 ] [ 2 ] [ 3 ] It was formulated by Waldo Tobler . This function was estimated from empirical data of Eduard Imhof .

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    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Shortest path problem - Wikipedia

    en.wikipedia.org/wiki/Shortest_path_problem

    Shortest path (A, C, E, D, F) between vertices A and F in the weighted directed graph. In graph theory, the shortest path problem is the problem of finding a path between two vertices (or nodes) in a graph such that the sum of the weights of its constituent edges is minimized.