I finally had the opportunity to test an idea: Use a linear CCD-array and the motion of a train to capture an image.

And yes, the images aren't very good as the setup was very improvised. My ModularCamera held in one hand, taking "screenshots" with my phone in the other hand. BUT it proves that it works! And it also made clear that you need quite the fast readout speeds to not get very squished images at normal ICE speeds.

The longer I'm looking at the pictures, the more I like them...