Board Thread:Questions and Answers/@comment-75.27.113.181-20140404014304/@comment-15636815-20140404161425

This question does not have a single answer with only one number. Basically, a new street has the same number of grid spaces as your existing streets at the time you buy the new street. All streets on the same station always have exactly the same size, and they always grow together.

Each of the three stations begins with one street that contains 70 grid spaces. Each station has street extensions available for sale, and the maximum size of a player's street is 360 (after purchasing all extensions).

So, for example:
 * If your Main Station has one street and two street extensions, that street is 90 grids wide. If you buy the Second Street at that point, the Second Street also will have 90 grids.
 * If your Main Station has four streets with 340 grids each when you buy the Fifth Street, all five streets will have 340 grids each.
 * The above examples work exactly the same way on the Second Station and Third Station.

After purchasing a new street, all streets on a station will add the same number of grids when you purchase a new Street Extension.