City planning would often bring many changes. The changing of the function of the city center, the transference of management, the update of the business sector and residential area, the transformation of the environment… as well as the revision of the roadmaps through the city.
As its name suggested, San Lin City had many mountains and forests. The earliest highways and roads were built around the geographical conditions; therefore, they had many twists and turns. After the city grew to a certain size, new straight roads were fixed to save travelling time, and the roads became wider and flatter. This was the reason the earlier roads had been abandoned.
