indiana jones isn't the only one who runs on top of trains....

so, there's some old railroad tracks close to my house. every once in a while there will be a small set of train cars left abandoned on the tracks,which will then disappear a few days later. so sometimes i'll climb up and sprint across the tops... but then i thought, "why is this abandoned here for a few days in the first place? why couldn't the one train take it all the way?" if anyone could enlighten me, i would be greatly obliged.