i'm not so good, but i think you could make the jet look more at the bg if you would decrease the contrast, that would kinda look like he would be farther behind. I'm not sure if I'm understandable^^ hopefully it can help you sometime^^
Great job. This is how a freight train should look like (but "two standart tracks scheme" is a big question) But someone always said that keeping standart trains will be cheaper despite being less effective when you need to transport not only passengers. I hope that if the passenger trains will be changed to MagLev's in the future, freight trains will become what they should have been. And it's nice to see VTOL and Tank Hunter again(and to see that they are well detailed despite not being in the center of attention)
I like the mix of conventional and futuristic technologies. When I look at that train engine I get this really weird feeling.... like i really want to touch a plastic minature model copy of that engine.... my palms are tingling at the thought of it.