Fig. 5: Traffic signal diagnosis: isolated intersections & traffic signal coordination.
From: Traffic light optimization with low penetration rate vehicle trajectory data
a Intersection geometry and traffic control parameters of an example isolated intersection: Quarton Rd. & Cranbrook Rd. b Green split diagnosis for the morning peak (AM, 07:00–10:00). The horizontal axis is the green duration for the major phase and vertical axis is hourly weighted summation of total delay and number of stops. c Cycle length diagnosis for the morning peak. This figure shows how the hourly total delay and number of stops change with different cycle lengths, where one stop is equivalent to 10 s of delay. d An example corridor: Adams Rd. which is composed of six signalized intersections. e Illustration of green band, offsets, and relative offsets. f Pair-wise coordination line search diagnosis for the midday period (MD, 10:00–15:00). Total delay & number of stops change with different additional relative offsets between the first two intersections.
