"Yeah, a complete redo of the Equestrian railway. And it's quite needed if you ask me, cause we're talking about trains running on these tracks everyday at 125 mph. Also, as I said earlier, a new signalling system will be in place. You see, the railway line will be separated in blocks. Each block will be introduced by a signal placed next to the tracks:
If there's a train in a block, the signal protecting this block will display a red aspect, meaning Danger. The driver in that case will need to stop the train before the signal.
If there is a clear block separating two trains, the signal protecting this clear block will display a yellow aspect, meaning Caution. When encountering this signal, the driver must slow down to at least 25 mph as quickly as possible, in order to be able to stop at the next signal, expected to be at Danger.
When two blocks are clear, the signal will show a double-yellow aspect, meaning Preliminary Caution. You have to start applying the brakes and stay at moderate speed. 75 mph is a good speed to be able to be able to react to whatever the next signal you encounter displays.
And finally, there's the signal displaying a green aspect, meaning Clear. You may proceed at the speed limit of the line you're running on."
While explaining, Azure gave Molotov a drawing about what he was talking about, so it would be clearer.
"Also, there would be magnets between the rails, 220 yards ahead of every signal. These would serve for the Advanced Warning System. I'll talk about it later, since it's cockpit stuff. There also will be speed limitations of course, you'll never see a train going through a sharp curve at 125 mph!" He would chuckle, looking at Molotov. "Oh, and level crossings will be removed on 125 mph sections. It'd be too dangerous for ponies nearby."
"As for your robotized service, it'd be cooler than ponies for sure! I'll give you the passenger cars' blueprints so you can see how to make the wiring and stuff fit in. Same goes for the radio stuff."
Azure nodded in agreement, raising a hoof to brohoof his new friend. "That's a deal, Partner! So, tell me about the size of your device needing a battery, so I can make it fit and not weigh too much. Batteries can be heavy you know?"
Azure was opening his mouth to speak once he realized a friend of his finished building a simulator of the Celestial Express 125's cockpit. A bright smile drew his face. "I was on my way to describe you what would be in the cockpit, but I'm sure you'd love a direct demonstration of what would the driver face when this beauty's in service: a friend of mine finished building a simulator of this train's cockpit. I ain't asking if you wanna get there, I already know the answer." Making a smug smile, the Pegasus nudged the Unicorn inventor while winking at him.