Service Platforms A-G are infrastructure buildings located to the northeast of the starting game zone, adjacent to the Airport Terminal. They were added during an update on 12.20.2013.
Purchase of each Service Platform along with the corresponding Tunnel Entrance enables the purchase of one Subway Train.
A total of 175 assets are needed to complete construction of all seven Service Platforms. This equates to 175 if one were to buy every asset instead of waiting to receive them from neighbors.
Once a Service Platform foundation is purchased, the construction site cannot be deleted using the bulldozer tool.