two PBS probs

[hovering teacup]

sorry if these are already known and simply left with low priorities;


1) train dosnt reserve the level crossing

in a PBS like this;

Code: Select all

<-- direction
=s|\/s=
==s/\s=

s : one-way signal to <--
\ / : switches
= : rail
| : level crossing

when a train is stopped in the upper line with its end still on the LC but have cleared the switch part, a next train willing to go into the upper line believes that the route be clear entirely and shoves into the tail of the previous.
in most cases this can be avoided by replacing the LC with a bridge


2) when there are non-accessible exits with green (non-accessible due to rail combination) and all accessible exits are red, the train penetrates into the PBS, and that's not all, it goes into an occupied exit and hit a train there.

(an exemple of such a PBS is that you have two parallel lines in the same direction, and in a station with 5 platforms the first and second platforms from the left is accessible to the left line, the first and second platforms from the right is accessible to the right line and the middle platform from both, and you can't separate the left junction and the right junction because there's no space for that)

[AndersI]

2) when there are non-accessible exits with green (non-accessible due to rail combination) and all accessible exits are red, the train penetrates into the PBS, and that's not all, it goes into an occupied exit and hit a train there.

(an exemple of such a PBS is that you have two parallel lines in the same direction, and in a station with 5 platforms the first and second platforms from the left is accessible to the left line, the first and second platforms from the right is accessible to the right line and the middle platform from both, and you can't separate the left junction and the right junction because there's no space for that)

As far as I understand, this is a situation that PBS will not handle, ever (at least that was the answer I got when I had the same question/bug report). PBS expects all connected rails to be usable paths. You (and I) have to redesign such stations or turn off PBS signaling there.

[Patchman]

1) It works if you leave an empty track tile between the crossing and the next signal. The problem is that TTD (not TTDPatch) unreserves the crossing as soon as the wagon has left it, not waiting for the wagon to leave the next tile like in the case of other PBS tiles.

2) can't be done without a rewrite of the pathfinder. Signal blocks never consider whether end points are reachable or not, they are always the whole block

[hovering teacup]

thx for tips, AndersI and Patchman