It is very important that we must be patient to your 'Snow Removal Contractor'. You tend to panic when the snow on your driveway is not remove right away. As much as you want your snow to disappear, same thing that your 'Contractor' is eager to tend your needs. As we all know that it takes 12 hours for the 'Contractor' to remove your snow (As indicated to your "Contract").
However, there are many reasons why there is a delay for your 'Contractor' to be there right away.