- a significant difference in wage rate taken care of equivalent work done under differing circumstances.
- an improvement inside transportation price or perhaps the few vehicles per device time for you to exactly the same location over various roads, to be able to equalize traffic.
- a positive change in prices on the exact same course owing to variations in the products becoming transported.
- a positive change in wage price taken care of the exact same work carried out under differing circumstances.
- A difference in transportation rate or even the quantity of automobiles per device time and energy to similar destination over various channels, so as to equalize traffic.
- a positive change in prices over the same route due to differences in the products being transported.