At the very least they should be shoveling in the morning or putting down some sand. Have you said anything to them about it? If they are licensed it might be a regulation to keep exits free and clear (to get kids out safely) so bring it up.
That said, I live in a hill in upstate NY. We have to be plowed every storm, sometimes multiple times) And they will sand for us (for an additional fee) I tell my families that for obvious reasons 4 wheel or All wheel drive is best and to wear appropriate foot wear in case of ice/snow. This after a parent tried to walk up my driveway during an ice storm in stilettos...