Board Thread:Questions and Answers/@comment-24.127.133.196-20140228010642/@comment-5596770-20140302175721

Placing Buildings in your station increases your station's passenger production per hour, but also increases your maximum passenger limit. Another way is to have your friends place Flags in your station, which will temporarily provide a bonus to production and passenger limit. You may also watch an advertisement to get a Supersonic Flag.