It's hard to say, but that could be from, either the brake pad rubbing against the rotor, which the dust in between the moving rotor and brake pad could cause a loud whine while driving. Or the second possible problem could be from a faulty wheel bearing. and that noise, could/would get louder when veering in one or either direction (from lane to lane on a highway or two lane road).. see if any of those issues suit the problem in your vehicle.