This is the legend of the haunted "Ghost Tracks" in San Antonio, Texas. The story is that in the early 1930's or '40's, there was a school bus carrying kids, making it's route and dropping them off after school. When the bus was going uphill over some railroad tracks, it stalled. Suddenly, a train, going too fast, crashed into the bus, killing all of the passengers.
While the ghost tracks is known to be the place to go on Halloween, it's visited by regular folks on any day of the week. I've gone there three times in the past five months with family members. I'm not from Texas, but the point of going there is the phenomenon that occurs. If you park your vehicle fifty yards away from the tracks, place it in neutral and turn off the engine, your vehicle will roll up and over the tracks.
We've tried it different ways and each time, it worked. We put the brakes on as we were coming over the tracks and we still rolled over them. We parked at the bottom of the tracks as were mysteriously pushed away. We were not allowed to go back up the hill. To attest to the ghost track's popularity, many people were there on all three nights that we visited.
It is said that the spirits of the kids who died on the bus push the cars away from the train tracks so the passengers don't experience the same fate. Legend has it that if you put powder on the back of your vehicle, you can clearly see small handprints in it, after the vehicle is pushed. I have seen many people do this and look for the handprints after they are over the tracks. I don't know if they found any and we didn't use powder.
Another creepy thing is that the roads near the railroad tracks are named after the children who died in the accident. The ghost tracks are on Shane Road. There's also Cindy Sue, Bobbi Allen, Richey Otis, Laura Lee Way, and Nancy Carole. I read a book that my grandmother bought form me called "Spirits of San Antonio and South Texas" by Docia Shultz Williams and Reneta Bryne. This book is interesting and has a couple of pages about the ghost tracks.