It's a workable idea, but I do see some issues. For example, what would it look like when trains "battle?" A train wreck destroys both trains -- consider the Russian movie "The Edge" for example, for a train on train "battle."
Trains are necessarily on tracks, and to permit access to your tracks requires deliberately connecting to the enemy's tracks.
Your trains might be metaphorical trains, such as large trucks with many connected trailers.
Or your story could be the tale of a group of post-apocalyptic survivors who use a train to escape a wasteland, rebuilding bridges and laying new track when the have to, so that they have hope of starting over in greener lands.
Every time i up load a book and for a print when i receive it the beginning of the chapter are on pages where other chapters ends How do i get it to start on the next page?