@geoffkait I stated I studied Civil Engineering which branched off into road design and traffic engineering. i studies materials, structures (stress/shear/cantilever/moments/compression), geology, fluids, economics, business, etc, etc. i also stated I held a commercial pilots licence, through which aerodynamics is taught.
Please do not show your ignorance of engineering, and of Traffic Engineering. If you look at sonics and acoustic engineering, traffic flow is much the same, and fluid dynamics. Flow, compression, density and dispersion.
Not as simple as people may think. Then add to this driver behaviour which involves psychology and other factors. Then factor in a vehicle break down which complexes the flow dynamics further.
So, in essence my studies and work in Engineering is another form of what the OP is doing and what @audiopoint has written as explanation to my questions. I have a good idea of what is the theory, but the practical is a question I have been seeking answers for.
Thank you @audiopoint and @theaudiotweak for your candid explanations, the subject and answers of which I am finding on various forums and websites.