You can see who is the most successful at making deliveries by train amongst all of the players who choose to do so. To access this information, simply press on the large gold trophy in the upper corner. Here, you will see two categories of leaders: world leaders, and leaders amongst your friends. The global top leaderboard displays the 200 players that have done the best job delivering goods via trains. The friends leaderboard shows the most prolific players on your friend list. Load up trains if you’d like to make it onto the list too!
By the way: the faster you load a train, the more rating points you will get.