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The problem

Drivers of autos and trains ought to slow down when driving around blind curves, lest they hit something around the corner. For instance, a rock that recently fell onto the railroad track can cause the train to derail, perhaps causing an environmental problem if the train's cargo was hazardous.

A proposed solution


  • a suitably hi-res terrain model
  • the road or railroad path
  • the braking and acceleration characteristics, both what's physically possible and the cost.