Rail Wars, a popular anime, will get a Vita visual novel adventure in Japan thanks to 5bp. The story follows the railway guards (literally, armed and what not) trying to protect the passengers, stations, lines and trains from rivals and enemies. Its all fairly light stuff, not a Mad Max style affair.
The TV series has just started airing in Japan, making good time for the game, which will be fully revealed in the this week's issue of Famitsu. Here's the trailer for the TV series, you can find full episodes on YouTube if you want to get a better feel for it. Hopefully they'll be a little rail simulator buried in the game, to tide over the likely character-heavy plots.