Hi Jim
Like you I am using the TJet slot cars, but for the amount of slot track that I am proposing, there aren't enough varieties to fill it up, so for the track that is farther away from the trains, I have had to resort to the 1/64 scale.
The circuits that I have come up with so far include a delay track, where a car passing over it would shut that section of track down for a predetermined amount of time. This would work independantly in both directions. That way a second car that was close behind would be stopped so that it wouldn't be prone to rear-end the first car. With this control, you can run several cars in each direction, allowing for more animation.
Another circuit I am working on is for RRXings. I wanted something a little more realistic than just stopping the cars when a train approched. In real life there are always the fools who will still try to cross until the last minute. What I wanted was for the signals to activate but still have the cars cross the tracks until the train reached a certain point, and then as soon as the last car had gone by, start up again. It may not sound so difficult, but to do it so that it worked with the train coming from either direction turned out to be a real puzzle. I think that I have figured it out, but haven't breadboarded the circuit to make sure that it works.
The third circuit that I am working on is a traffic light controlled intersection. I am fairly confidant that it will work, but I haven't been able to breadboard it yet either.
If any of these sound like they might be useful to you, or if you have any ideas for other areas that need to be addressed I would be happy to offer any help that I can.
You might try checking out similar threads at
http://www.railroad.net/forums/model/ and
http://www.talk.rrdepot.com/viewforum.php?forum=4&64. There are a number of people there with some really good ideas.
It is always nice to find new people with intrests in the same little niche of this hobby. I am constantly amazed at how many of us there are.there are.
Clark