pavzav opened the ticket and wrote:

If you set vehicle orders A, B, C, D the vehicle goes ABCD-ABCD-ABCD etc. but this would also be useful: ABCD-DCBA-ABCD etc. I.e. after the end of the orders, the vehicle would go back in the reverse order of orders. Passenger trains and buses in the real life have the schedule like this. Of course this system can be simulated by the current one but you need to add each station twice. Please, allow the player to set the system (ABCD-ABCD or ABCD-DCBA) for each orders list separately.

There is a problem with the non-stop orders - see example:
1: Go to A
2: Go non-stop to B
3: Go to C
It would make no sense if the reverse direction would be:
3: Go to C
2: Go non-stop to B
1: Go to A
You need non-stop BETWEEN 1 and 2 not before 2. So the orders should like this:
1: Go to A
non-stop
2: Go to B
3: Go to C
This would work in the backward direction like this:
3: Go to C
2: Go to B
1: Go non-stop to A

Reported version: 1.2.0
Operating system: All

This issue was imported from FlySpray: https://bugs.openttd.org/task/5196