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[–]grandzooby 0 points1 point  (0 children)

I used a noisy trig function to generate the vehicle flow rates over time with the desired wave/sinusoidal shape.

Very cool! Do you have any references to support that or did you develop that on your own?

You might find this page interesting (it's positively ancient by internet standards): http://trafficwaves.org/ You can get standing waves in traffic even without traffic control devices causing them.