The increase in the kilometers of railway in the period from 1900 to 1909 can be attributed to several factors:
Economic growth: The turn of the 20th century saw significant economic growth in many countries, especially in Europe and North America. With economic growth came increased demand for transportation of goods and people, which led to the construction of new railway lines.
Industrialization: The period from 1900 to 1909 was characterized by rapid industrialization in many parts of the world. The construction of new railway lines was necessary to transport raw materials and finished products to and from factories.
Technological advancements: The late 19th and early 20th century saw significant advancements in railway technology, such as the development of more powerful locomotives, which made it possible to construct longer and more efficient railway lines.
Government investment: Many governments during this period invested heavily in railway infrastructure as a means of promoting economic growth and national development. This government investment helped to fund the construction of new railway lines.
Overall, the increase in the kilometers of railway during the period from 1900 to 1909 can be attributed to a combination of economic, technological, and government factors.