Should government spend money on highways or public transportatio2

Should government spend money on highways or public transportation? Whether governments should spend more money on improving roads and highways or on improving public transportation is maybe one of the most important topics people are arguing about nowadays When I am asked about this question, I will give my answer, basing on some reasons and details listed below Public transportation, as named, is a transportation system for the whole society of a country It is efficient, when used in a country with high population density, such as China The number of population is billion here When every family occupied its own cars, you can imagine what a jam roads will be On the other hand, public transportation is economical A bus with 40 passengers in it consumes mush less gasoline than 40 cars in all Of course, with less gas being used, less pollution will be made From the advantages I listed above, you may prefer to let our governments pay money on public transportation, but you must know that there are a lot of countries in this world with low population densities To them, buses, trains and subways are always empty, because it is not convenient for passengers to get to the stations Even though someone live near a station, they have to wait for a bus several hours, because bus companies not want to provide a big bus for only several passenger without profit From the reasons and details above, we may safely get the conclusion that whether governments should spend more money on improving public transportation or on improving roads and highways depends on the population density in those countries