Probably the biggest obstacle in making such a list, are the infinite variables available. For instance an automated crossing can be triggered by infrared sensors, by track occupancy, by reed switches, by computers, and the list goes on. Then you have multiple companies that make products to accomplish that, plus it may be totally different for DC or DCC.
The easiest way on here, would be to give us a set of parameters, as much detail on your trackwork, and any other pertinent info that you can, then sit back and wait for the questions to roll in, and eventually you will get the most suitable information for your situation. It's not a simple chore to blindly design a system for someone by long distance, but it can be done, and there are plenty of talented modelers here that would be glad to help.
By the way, all the information you seek is most likely already on the interweb, but it's a real job to find it.
Good luck,
Joe