Balancing queues in RollerCoaster Tycoon?

Solution 1:

Do your best to put the entrances to both queues right next to each other. A lot of times if the line is too long, they'll leave. But based on the same set of interests they'll go into the other line. The alternative is to do a promotion for the ride that isn't getting enough attention to try to balance it out.

Solution 2:

No. The reason they do this is because one was built before the other, so they go to that one, and secondly it is normally closer.

Havn't found a fix for this.