I don't, I love trains. My trains do not run on one track and they do not crash each other to bits. They just pass each other politely.
Oh! what am I saying - where is the fun in that!??
Well, I actually happen to be on the Train Saftey Society, (TSS). We have noticed this problem at the TSS, and have been encouraging math teachers around the globe to stop using such horrible depictions! We have had no luck, despite telling the teachers that this is setting a bad example for the kids. We are working as hard as we can to solve this, and will get back to you at a later date.
Council member, Devo
Train Saftey Society