The line graph shows the quantities of produces transported by six various of system transport in the USA since 1990 with lead before 2040.
Overall, it is clear that goods transport such as road,water,and railwat incresead rapidly,while the reverse true for air,pipelines,and cable leveled out steadly.In addition,road was higher than other mdels in the USA.
In term of the road grew dramatically at around 40 millions tons by 2015,which the road will reached at 50 million in 2040. At the start of the period, water and railway raised gradually at 30 and 25,respectively,by 1990 but, by the end,railway was most popular and it will peak at 35 milliom tons by 2040.
With regards to the amount of air produced,it began at around 3 tones and then peaked at 7 million tones in1990. Likewise, the pipelines and cable flustuated slightly, while the air raised significantly.After then goods transported will peaked at 8 tones million.
