This button is useless for bus lines in terms on income and capacity.

I must confess that I don't get quite the idea of Prissi's example or if that is a particular case or general, but surely it is my limitation.

Say we have 3 stops, A, B and C. Let's assume they are in one straight line, say distance A to B is d and B to C is also d (thus A to C is 2d). Let's also assume that n people are travelling from each stop to each other stop (so n from A to B, n from A to C, n from B to A, n from B to C, n from C to A and n from C to B).

The "replicate backwards" schedule is A - B - C - B - A:

Expected income is: distance travelled * number of people:

A-B: n*d

A-C: 2*n*d

B-A: n*d

B-C: n*d

C-A: 2*n*d

C-B: n*d

In total: 8*n*d

Maximum capacity needed is 2*n (for example from B to C only the A-C and B-C travellers)

The "Prissi/circle" schedule is A - B - C - A:

Expected income is: distance travelled * number of people:

A-B: n*d

A-C: 2*n*d

B-A: 3*n*d (B-C is d, C-A is 2*d)

B-C: n*d

C-A: 2*n*d

C-B: 3*n*d

In total: 12*n*d

Maximum capacity needed is 3*n (for example from B to C only the A-C, B-C and B-A travellers).

In short: the "replicate backwards" schedule earns 67% of the "circle/Prissi" schedule, but needs only 67% of its capacity.

Financially, the "circle/Prissi" schedule is better, but if you're not looking for income (freeplay!) and if you're having capacity problems the "replicate backwards" schedule is a good option.

(Anyone still there?

).