Beta 327:
-prevent building impossible track layouts, when a room was in it's path.
-prevent build track if platform length not equal to track length
-prevent build track if rooms in path of platforms edges either side
-prevent building tracks when there is non contiguous floor on the platform (1 cell left or right of track). This is a slight change in the rules to ensure there is always space to reduce or extend your track along a 3 cell channel beyond it's start/end. In very rare cases, some users maye have deliberately been building concourse onto platforms onto platform reserved cells beyond the end of the track. This was possible only by building up on those cells before building the track and was a loophole in the system and the cause of some unknown bugs in the past. This is no longer possible, so if you have done this, when you load a station that has this set up, you will notice that any track not conforming to the new rules will have sold itself. Sorry about that inconvenience, this is one of the only times I have permanently changed the building rules surrounding tracks in early access.
-commuters that say "NO WAY OUT" more robustly recreate needs
-if you change a turnstile/stair/target that a commuter is pathing towards they will despawn. While it may be slightly less realistic, this is just more robust and less bug-prone than attempting to recalculate routes. in most cases it is not noticeable.
-fix potential hard crash when building/cancelling building of two celled shops.