The given line graph shows the amount of goods which is transported by different modes in the USA since 1990 with previsions for 2040. The types of modes of transport are divided into road, water, railway, air, pipelines, and cable which represent as blue, yellow, red, green, brown, and dark blue line respectively. The figures are given in million tons.
Overall, it can be seen from the graph that the road is the most popular mode of transport in the USA during the stated period in a question.
As is illustrate by the graph, in 1990 show the road as the highest chosen choice of transport, rising from 35 to 40 million tons in 2015. In spite of some fluctuation between 1995 and 2005, there was a gradual increase, which is forecasted to reach 47 million in 2040.
Moreover, the quantities of goods transported by water and railway started at 20 million and 15 million in 1990. While mode of water fell slightly, railway increased slowly and equaling with water between 1995 and 2000. There is some fluctuation since 2000 to 2015 but both modes have same figure, 23 million tons, again in 2015. Goods transported by water are projected to stay constant at 25 million tons from 2025 to 2040 whereas railway is predicted to grow steady to 32 million tons in 2040.
In 1990, air, pipelines, and cable modes of transport were the least used mode with only 4 million tons. The amount of goods transported by air had minimally risen by 3 million, but pipelines, and cable by 1 million in 2015. The quantities of transport by pipeline, and cable fluctuate between 2000 and 2015. Furthermore, it is expected that air and pipelines will steady rise to 8 million and 6 million respectively after 2035 while cable will fall to 1990 figures in 2020, and maintain the same level throughout 2040.