Thanks GreyBeard, those are some good options, I will try the spawn code. I loaded the map string into the editor and couldn't find any uranium anywhere but the tiny bit at the spawn point.

Here is the map string:
>>>AAAPAB4AAQADAwcAAAAEAAAAY29hbAEEBAoAAABjb3BwZXItb3Jl ...

I have no Uranium. There was a small patch in my starting area and now there is none. I'm playing with rail world like setting with Uranium set on Low frequency, and big size. Using the following mods: (not that these would be the problem)
AutoDeconstruct
AutoFill
Base Mod
Big Brother Tweaked ...

OK, that got the trains out of the circle and into the 2 way lines but now they won't go back in to the circle. Aaargh.

https://steamuserimages-a.akamaihd.net/ugc/832454969385810555/2EC2EF0255B2101FAFB4DD61AE4BC5BEEF4AD349/?interpolation=lanczos-none&output-format=jpeg&output-quality=95&fit=inside ...

I was worried that was the solution. Much harder to prevent trains from jamming the roundabout when you have the exit signal so close, but that is definitely what the problem was.

Thanks

I'm having problems with this rail design. I changed two tracks leaving the circle in the middle to the north west. They used to be one in and one out. I want them to be two separate two way tracks that are both in and out. The track is manually navigable, there are no flashing signals, and each ...

I see what I was doing wrong now, thanks everyone.

I got it to work by moving the signals at the intersection further away from the intersection. What do you mean by double signals?

I just started using trains. I've watched the tutorials. I understand all the basics, blocks, stations, repeater signals etc. For some reason my trains are getting "No Path" errors.

My setup is very simple 2 separate lines that cross each other. Funny thing is trains on both lines work fine but as ...