I'm pretty sure browsers will always detect my Surface as a device with an accurate pointing device, which is not how I use it most of the time, so I doubt the API is reliable. Also, according to caniuse.com, Firefox doesn't support it.
I don't know if they still have those screens though - those pages got discontinued last year.
They probably use a smartphone app now. (One of my friends is a traffic controller at ProRail, and if I’m over at his place and there’s some question about whether the trains run on time, he checks his phone. I’ve never looked, so it could be be just uses the NS app, but I get the impression he has access to more info than that provides.)