Stafful

Yeah we've worked out what's causing it now, but the remedy may be put into a post-release patch at this point so we can be sure its tested properly.
 
Cool, this is the IWBUMS thread so wanted to check. We have some general optimizations ready to go into that branch towards the end of next week - and Yuri is due to start work on some general vehicle optimizations too. I suspect that the increased/changed car spawns in the recent versions haven't helped much.

Make sure that you have it placed in the right part of your install folder. If you've got it through steam, it'll look like this:
C:\Program Files (x86)\Steam\SteamApps\common\ProjectZomboid\media\maps
Make sure you aren't just putting the BedfordFallsV2 folder in there. Open that up and copy the bedford and muldraugh folders into your media\maps folder.
Hope that helps!