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This paper presents a simple approximate procedure for traffic
analysis that can be described geometrically without calculus. The
procedure, which is graphically intuitive, operates directly on piecewise
linear approximations of the N-curves of cumulative vehicle count.
Because
the N-curves are both readily observable and of direct interest for
evaluation purposes (e.g., they yield the total vehicle-hours and
vehicle-miles of travel in a time interval, and the vehicular accumulation
as a function of time) the predictions made with this method should be
practical and easy to test.
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