[Feasibility?]Detecting car count/congestion percentage in a road. [closed]

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We have a sample test case consists of a road (don't mind the right side of the road)

where we should detect the "occupied" percentage of a road as shown in the image.

We conclude that we could use calculating/measuring the areas of the road to detect the percentage.

Another proposed (pls dont mind the excess cars)sample is the 50% scenario .

Also another scenario will be that it detects no cars/congestion