For example, the transportation costs of certain kind of goods is not only related with the flow and the demand of itself, but also related with the flow and the demand of its substitution.
Since the transportation costs of certain kind of goods is not only related with the flow of itself, but also related with the flow of other kinds of goods, the equilibrium problem when some kinds of goods are transported through the same traffic network should be considered.
Because the increasing of the flow and the demand of the substitution will put a whole lot of pressure on the transportation of the certain kind of goods under the same traffic network, the marginal cost will increase.
Statistical analyses on crash counts/rates are important steps for transportation safety planning and evaluations of certain transportation facilities.
Your ecological footprint is the total amount of carbon dioxide that you produce in life by using energy, especially fossil fuel, through transportation, use of electricity, consumption of certain food that require transportation and industrial fertilizers, waste and pollution.
The US State Department cautioned against all but essential travel to areas of Thailand affected by the flooding, including Bangkok, because of transportation difficulties and shortages of certain food items.
According to the ability of the virus to mutate over time and considering that new viruses can be introduced into the area through animal sources or transportation, a certain level of evolution of the viruses present in the area is expected.
With the operation of high-speed railways, the market share of air transportation has certain decrease, and there exist intense competitions between these two modes.
The council is responsible for such amenities as police protection, health services, transportation, and certain aspects of public assistance.
Furthermore, increases in fertility rates could significantly impact the usage and performance of the transportation system for certain periods of the day, by the year 2031.
