Posted on 9/26/2025
Every vehicle produces some normal sounds at highway speeds. Wind resistance, tire rotation, and engine noise are all expected. But if you start noticing a constant humming or droning sound, especially one that wasn’t there before, it may be a sign that something is wrong. Many drivers ignore these sounds, especially if the car still drives normally. The problem is that these noises can point to wear or damage in parts that are critical to your safety and comfort. Here are some of the most common causes of humming noises on the highway and how to tell the difference between a minor annoyance and a serious problem. Uneven Tire Wear or Cupping Tires that are out of balance or improperly aligned can wear unevenly. This often results in a pattern called cupping or scalloping, where patches of rubber wear down faster than others. At lower speeds, the sound might be minimal, but at 55 mph and above, it can become a rhythmic hum or even a low-pitche ... read more