The idea that arthority should spend money on developing rail way and subway lines or wider roads in order to improve traffic system is reamained a controversy. In my opinion, despite better roads is nessacery but I strongly support government to invest in subway lines because of some reason below.
On the one hand, due to the technology developement , trains are not only faster than cars but also safer for people. For instance, energeers from Japan were successful in testing their new electromagnectic trains which can speed up to 500 kilometers per hour. If Japan’s government built this new system across their country, japaness people could travel from the North to the South Japan in just 3 hour. In addition, there is a separate rail way for trains and they are controled automatically , that makes the accident rate of subway is much lower than that of car.
On the other hand, in order to reduce the green house effect, government should improve the public transportation such as subway lines, metro etc. Because today, most of trains are runned by electricity so they don’t cause any pollutant to the enviroment. Besides, subway lines were proved that it is an effective solution of traffic jams for some big cities such as New York, Bangkok etc. For those reasons, many developing countries choose to build subway lines instead of making wider road.
Generally, it is undisputable to say that we can not have a good traffic system with small roads but I think we should seriouly consider benefits of trains and subwaylines.