@Dylan the Train Man posted:
I plan to use Lionel's Fastrack grade crossing with flashers and gates. I want to know if there is a way to wire the lights and gates to a fixed 12-14V power supply. It should be possible.
If you're talking about 6-12052 there is a youtube video which suggests you splice your 12-14V external power into the red wire that comes connected to the "hot" center rail.
Jump to 7:40 in the video if the link doesn't automatically start there: