Mods/TrainCarts/Signs/Switcher

To link Minecarts together, all you have to do is give the Minecart a gentle push. When the two Minecarts collide, they will link together and form a train. However, you do need appropriate Permissions before you can link Minecarts.

After linking
The Minecarts in the train will try to keep a steady distance between their neighbours in the train. The velocity of the Minecarts are shared, therefore every external effect on a Minecart in a train is shared among all the members in the same train. Having multiple Minecarts in a single train also increases the momentum of the train, which increases the distance a Minecart can travel without being powered.