When driving a you start to hear a noise that isn't what you would normally hear then it's a good idea to have it checked out for your safety as well as those around you. A humming noise could be a wheel bearing that the bearing has begun to fail. This can happen due to age, mileage or excessive weight. The bearing will fail internally and after a period of time it can become a safety hazard.
Give us a call and let us take care of you. 541-791-2886