Whenever a new road or train station is opened, there is an opportunity for development companies to build housing and retail space for a new group of people. They see it as an opportunity to expand, and locals often see it as a way to help revive their economy. The importance of good transportation into a nearby city can make or break a small community, so adding commuting capacity is usually seen as a boon. While there are issues those who live in the local area will suddenly face, they can be overcome with good planning.
The work of any development company is to turn any land into a place where people will pay to live, work or play. Many of them specialize in different fields, but all of them are concerned with the goal of creating good places for those with the money to afford them. Their work is done once all the units in a development is sold, but they do have to keep their reputation in mind when creating any new development.