First, that cute little engineer on the left needs an engineers hat. 
Second, how about a separate line running within the one you have there but not connected. This way you can run a second train at the same time without worry of them slamming into each other.
Second, how about a separate line running within the one you have there but not connected. This way you can run a second train at the same time without worry of them slamming into each other.
![[-]](https://www.blueplastictracks.org/images/collapse.png)