I'll start, and then I'll ask some of our operating folks to discuss the protocol that is in place.
To be clear, when we looked at the records, there have been seven stopped train events in the last nine years. When this situation does occur, it is clearly of deep concern to the community and to us, which is why we have put protocols in place to address it.
I don't know if one of our operating guys would want to respond with exactly what the protocols are.