All that UPS cares about safety is anything that will cost them money. That is why there is so much training on safety so there is nothing they cannot blame the driver for.
Think about it, there is nothing that can happen on the route that they havnt already thought of and can twist it so its the drivers fault. I even heard one story about a driver who's truck was rear ended and they gave him a warning letter for running his route out of trace. They claimed if he had run it in trace he wouldnt have been at that spot at that time.