Question

What characteristics of southeast adia geography make construction of railroads a challenge

Answer 1

Most of South-East Asia consists of island countries, where most of the population resides in specific islands, and the rest of their territories are of very low density of population. Constructing railroads requires rather high density, since demand is what drives the need and usage of it. Railroad construction in SEA may also only be utilized for some of the more wealthy of the countries, such which sadly means that the majority will not be targets for railroad constructions.