Click on the Settings Tab and then scroll down to Train Settings.

There are two bars, one "Cars per Train" and the other "Number of Trains".

Pull or push the bars to increase/decrease both the number of cars and the number of trains. The default setting is One Train. You may need to adjust your station lengths, which should all be the same length. I go for 5 platform sections per station to have three car trains x the number of stations available.

Please note:- Your ride MUST be closed before you can move the sliders.

Also the same thing for other rides with multiple vehicles.

Originally posted by diazepamxx:

Having two different Monorail trains on the circular track.
My monorail track has 3 separate stations but only 1 monorail train going around the circle. Is it possible to add another monorail train (using the sync station option?) so I can shuttle more people around more quickly? Or will it just be the 1 monorail train going to the 3 separate stations?

No. There can more than 1 train.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3319124245

Originally posted by Wai:

Click on the Settings Tab and then scroll down to Train Settings.

There are two bars, one "Cars per Train" and the other "Number of Trains".

Pull or push the bars to increase/decrease both the number of cars and the number of trains. The default setting is One Train. You may need to adjust your station lengths, which should all be the same length. I go for 5 platform sections per station to have three car trains x the number of stations available.

Please note:- Your ride MUST be closed before you can move the sliders.

Solved. You must have at least *4* station segments at every station in order to have more than 1 train on the circular track.