BRISTOL/VERGENNES — A school bus may hiss and roar and squeak and fart in exactly the same way wherever it goes, but when it arrives in your neighborhood on a misty late-August morning it will sound vastly different than it did when it departed the previous June. It will sound different again transporting a sports team to a rival school, or dozens of energetic fourth-graders to a local museum, or an entire route of steaming and steamed kids who were anticipating a snow day. Now, in the middle of a global h … (read more)