The trucking companies that OMYA uses have a good safety record. And they're riding on Route 7 and there are shoulders, passing lanes. These are narrow, winding, mountainous roads that are often snow and ice covered. There are accidents all the time. Cars flip over.
Winter is especially dangerous.
You mentioned the aesthetic issue. Yet, quarrying in Vermont, whether it's marble, slate or granite, has been a part of the state's heritage and economy for a long time. One could argue that OMYA's proposed quarry is in keeping with that heritage. This is a very different kind of mining operation than is traditional Vermont quarrying. Danby is the home to the largest underground marble quarry in the world.