Some road transportation is done on regular routes or for only one consignee per run, while others transport goods from many different loading stations/shippers to various consignees.
This occurs due to a reduction in commuting time, as well transport costs but these benefits tend to accrue disproportionately to the influential and well-educated.
The parameters of photon transport, including the step size and deflection angle due to scattering, are determined by random sampling from probability distributions.