the train company that advertises on bus rears

We've got many clients who are fans of utilising rear space on their own buses for advertising purposes.

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It's their own product and it's invariably free so I can see their thinking. Local companies also seem to be fans too, which is probably more a reflection on price rather than suitability of medium.

But I don't think I've ever seen a train company take advantage of a bus rear. So step forward, and congratulations Dutch Railways.

Great idea, even better execution.