Board Thread:Questions and Answers/@comment-173.25.72.209-20131228224500/@comment-15636815-20140520180947

It's working perfectly. You just don't have enough information to understand how it works.

A train ride has two separate limits, not just one limit. The gold or materials have one limit, and the XP has another limit. A player can keep collecting gold and materials until reaching the XP limit for that ride. If the player missed some XP, the train rides continues until the player collects the maximum XP.

The reverse is NOT true. After the player collects the maximum XP, the train ride stops giving anything, even if the gold or materials collected are less than the maximum. To achieve maximum gold or materials, a player should avoid collecting the XP icons immediately when they become available. Instead, allow the first XP icon to float away, then collect 1 XP. Repeat this process until collecting the maximum amount of gold or materials.