the signs layout you did is not optimized. As i can see you missused the chains, and the stop sign too. The chains you used for the parking is no needed. The 3 which one of them the train stopped, all 3 of them are missused.
The top of the SS you took have 2 stop signs there which it should'nt be ...

Same here, Sometime just pressing the button to enter the train makes game crash!
0.002 2017-05-05 16:48:29; Factorio 0.15.8 (build 29493, win64, steam)
0.002 Operating system: Windows 10 (version 1607)
0.002 Program arguments: "F:\Steam\steamapps\common\Factorio\bin\x64\Factorio.exe"
0.002 ...

First post updated.

just the fact to get in the train makes it crash

So im trying to set a bit of logic so i can retrive the amount of fuel in train then compare it to a value say like if (solid fule < 20) then output solid fuel = true else solid fuel = false.
Keep in mind that i did a little outside circuit to test it with a constant and a lamp, in which if ...