If anyone is willing to help me figure out why my carts don't work correctly, I uploaded my map to Mediafire. http://www.mediafire.com/?zdkotyzkyjy. My problem is explained below, so if you know how to fix it without looking at my map, you could just tell me, but I provided the map in case whoever willing to help me needs it to help me. My map is a single-stage plr map that doesn't have crossovers. What it has is a shared track that only one cart can be on at a time. To make it so that there is no griefing with keeping the cart in the shared track, and to make it so the tracks to not collide, once blue cart passes a certain path_track, red cart cannot move past one of their path_track. Once blue cart reaches another path_track, red cart can move again (and vice versa). That function isn't put in the map yet since the two ways I tried to do it failed, but that is my intention. Most of my cart problems, which have taken me up a good two days to work with, have been fixed thanks to the help of people in the chat. Currently, my problem is with the blue cart. Every time I go near it when I test it to move it, it makes me crash. I've tried redoing all of the cart's entities and triggers, and it results in either a crash or the cart not moving. I've copied the red cart and just changed all the information to fit for blue cart. That didn't fix it. I tried recopying Snark's blue cart from his library, and that doesn't help. I apparently screwed up somewhere, and cannot figure out what to do.