A setting that slightly updates the pathfinding algorithm for trains.
New Train pathFinder (NTP) is an improvement on the original TTD pathfinder that does not always present the best choice, loses your trains, but has worked fine for 10 years and most of us have learned to live with it. It is always advisable to turn this on since it IS better than the old one and doesn't consume any more resources. The better alternative is to enable YAPF. Enabling YAPF or NPF will override this option.
This feature is disabled by default. You can enable this patch through the configure patches -> vehicles window or use the following syntax in Openttd.cfg:
[patches] new_pathfinding = true