How to avoid train accidents! - a 5 yr old's perspective

Raghav and I were discussing the recent train crash in West Bengal and I was explaining what happened, what was in the papers and so on......he came up with this theory - "amma, do you know why this accident happened?.....it's because there are no changing tracks for the trains......on the road, cars can move from left to right and right to left and avoid dashing into each other!.....if they had built changing tracks for trains, this would not have happened!" Hear ye.......Railway Minister!!